Close menu
Homepage
Sensor systems Sensor systems
Sensor systems (1284 results) Show all
Position sensors Position sensors
Position sensors (483 results) Show all
Inductive sensors Inductive sensors Photoelectric sensors Photoelectric sensors Laser distance sensors Laser distance sensors Ultrasonic sensors Ultrasonic sensors Capacitive sensors Capacitive sensors Cylinder sensors Cylinder sensors Ring sensors / Tube sensors Ring sensors / Tube sensors Magnetic sensors Magnetic sensors Mounting accessories for position sensors Mounting accessories for position sensors Reflectors Reflectors Sensor testers Sensor testers
Process sensors Process sensors
Process sensors (784 results) Show all
Pressure sensors Pressure sensors Pressure transmitters Pressure transmitters Submersible pressure transmitters Submersible pressure transmitters Pressure gauges Pressure gauges Flow monitors Flow monitors Flow sensors Flow sensors Volumetric flow meters Volumetric flow meters Compressed air meters Compressed air meters Temperature monitors Temperature monitors Temperature sensors Temperature sensors Temperature transmitters Temperature transmitters RTD probes RTD probes Continuous level sensors Continuous level sensors Point level sensors Point level sensors Float level sensors Float level sensors Conductivity sensors Conductivity sensors Process adapters Process adapters Mounting accessories for process sensors Mounting accessories for process sensors Probes / Coaxial pipes Probes / Coaxial pipes Seals / O-Rings Seals / O-Rings
Motion sensors Motion sensors
Motion sensors (15 results) Show all
Speed sensors Speed sensors Incremental encoders Incremental encoders Encoder accessories Encoder accessories
Vision sensors Vision sensors
Vision sensors (3 results) Show all
3D sensors 3D sensors
Machine condition monitoring Machine condition monitoring
Machine condition monitoring (4 results) Show all
Vibration sensors Vibration sensors
Sensor programming Sensor programming
Sensor programming (3 results) Show all
IO-Link programming IO-Link programming
Process instrumentation Process instrumentation
Process instrumentation (875 results) Show all
Pressure measurement Pressure measurement
Pressure measurement (280 results) Show all
Gauge pressure transmitters Gauge pressure transmitters Hydrostatic pressure transmitters Hydrostatic pressure transmitters Pressure switches Pressure switches Accessories for pressure measurement Accessories for pressure measurement
Flow measurement Flow measurement
Flow measurement (176 results) Show all
Electromagnetic flow meters Electromagnetic flow meters Ultrasonic flow meters Ultrasonic flow meters Thermal dispersion flow sensors Thermal dispersion flow sensors Vortex flow sensors Vortex flow sensors Turbine flow sensors Turbine flow sensors Paddle flow switches Paddle flow switches Coriolis flow meter Coriolis flow meter Accessories for flow measurement Accessories for flow measurement
Level measurement Level measurement
Level measurement (212 results) Show all
Capacitive level transmitters Capacitive level transmitters Radar level transmitters Radar level transmitters Ultrasonic level transmitters Ultrasonic level transmitters Hydrostatic level transmitters Hydrostatic level transmitters Vibrating level switches Vibrating level switches Capacitive level switches Capacitive level switches Conductive level switches Conductive level switches Rotary paddle switches Rotary paddle switches Float level switches Float level switches Accessories for level measurement Accessories for level measurement
Temperature and humidity measurement Temperature and humidity measurement
Temperature and humidity measurement (131 results) Show all
Din-rail and head transmitters Din-rail and head transmitters Industrial thermometers Industrial thermometers Compact thermometers Compact thermometers Temperature control units Temperature control units Accessories for temperature measurement Accessories for temperature measurement
Process control and monitoring Process control and monitoring
Process control and monitoring (101 results) Show all
Data managers / data loggers Data managers / data loggers Process indicators Process indicators Process transmitters Process transmitters HART Communications HART Communications Surge arresters Surge arresters Accessories for process control and monitoring Accessories for process control and monitoring
Control systems Control systems
Control systems (175 results) Show all
LOGO! Logic modules LOGO! Logic modules
LOGO! Logic modules (34 results) Show all
Logic modules with display Logic modules with display Logic modules without display Logic modules without display Digital expansion modules Digital expansion modules Analog expansion modules Analog expansion modules Text displays Text displays Communication modules Communication modules LOGO! Programming software LOGO! Programming software LOGO! Power supplies LOGO! Power supplies LOGO! Contact switching modules LOGO! Contact switching modules LOGO! Starter Kits LOGO! Starter Kits
SIMATIC S7-1200 SIMATIC S7-1200
SIMATIC S7-1200 (77 results) Show all
Central processing units Central processing units Digital input/output modules Digital input/output modules Analog input/output modules Analog input/output modules Communication processors Communication processors Power supplies Power supplies Programming software STEP 7 Programming software STEP 7 Memory cards / Accessories Memory cards / Accessories S7-1200 starter kits S7-1200 starter kits
HMI operating panels HMI operating panels
HMI operating panels (34 results) Show all
SIMATIC HMI Unified Comfort Panels SIMATIC HMI Unified Comfort Panels SIMATIC HMI Basic Panels SIMATIC HMI Basic Panels Programming software WinCC Comfort Programming software WinCC Comfort Programming software WinCC Basic Programming software WinCC Basic HMI / Touch panels HMI / Touch panels HMI programming software HMI programming software Accessories for HMI / Touch panels Accessories for HMI / Touch panels
Programmable controllers Programmable controllers
Programmable controllers (6 results) Show all
Compact controllers Compact controllers Controller software Controller software
Communication modules Communication modules
Communication modules (2 results) Show all
Ethernet I/O modules Ethernet I/O modules
IoT components IoT components
IoT components (22 results) Show all
IoT gateways IoT gateways
Safety technology Safety technology
Safety technology (190 results) Show all
Safety sensors Safety sensors
Safety sensors (131 results) Show all
Mechanical safety switches Mechanical safety switches Safety scanners Safety scanners Solenoid interlocks Solenoid interlocks Magnetic safety sensors Magnetic safety sensors Safety mats Safety mats RFID safety sensors RFID safety sensors Inductive safety sensors Inductive safety sensors Safety light curtains Safety light curtains Hinge safety switches Hinge safety switches Accessories for safety sensors Accessories for safety sensors
Safety controls Safety controls
Safety controls (26 results) Show all
Fail-safe SIMATIC S7-1200F Fail-safe SIMATIC S7-1200F Safety relays Safety relays Safety I/O devices Safety I/O devices
Safety input devices Safety input devices
Safety input devices (33 results) Show all
Emergency stop buttons Emergency stop buttons Palm switches / Foot switches Palm switches / Foot switches Safety rope pulls Safety rope pulls
Industrial communication technology Industrial communication technology
Industrial communication technology (53 results) Show all
Industrial Ethernet Industrial Ethernet
Industrial Ethernet (50 results) Show all
Unmanaged Ethernet switches Unmanaged Ethernet switches RJ45 patch cables RJ45 patch cables
Serial communication Serial communication
Serial communication (3 results) Show all
Modbus communication Modbus communication
Measuring & regulation technology Measuring & regulation technology
Measuring & regulation technology (120 results) Show all
Process displays / Counters Process displays / Counters
Process displays / Counters (60 results) Show all
Counters Counters Meters Meters Process displays Process displays Data loggers Data loggers
Temperature evaluation Temperature evaluation
Temperature evaluation (22 results) Show all
Temperature controllers Temperature controllers
Signal conditioning Signal conditioning
Signal conditioning (38 results) Show all
Analog signal conditioners Analog signal conditioners Current transformers Current transformers
Switches & signaling devices Switches & signaling devices
Switches & signaling devices (301 results) Show all
Switches Switches
Switches (258 results) Show all
Pushbuttons Pushbuttons Multiple pushbuttons Multiple pushbuttons Mushroom-headed pushbuttons Mushroom-headed pushbuttons Key operated switches Key operated switches Illuminated pushbuttons Illuminated pushbuttons Indicator lights Indicator lights Selector switches Selector switches Emergency STOP/OFF pushbuttons Emergency STOP/OFF pushbuttons Coordinate switches / Potentiometers Coordinate switches / Potentiometers Acoustic indicators Acoustic indicators Contact modules Contact modules LED modules LED modules Surface mounting enclosures Surface mounting enclosures 22 mm data connectors 22 mm data connectors PROFINET modules PROFINET modules Complete devices Complete devices Labels Labels Accessories for switches & signaling devices Accessories for switches & signaling devices
Palm switches Palm switches
Palm switches (2 results) Show all
Complete devices - palm switches Complete devices - palm switches
Stack lights Stack lights
Stack lights (34 results) Show all
Complete devices - stack lights Complete devices - stack lights Light modules Light modules Buzzers Buzzers Base modules / Mounting Base modules / Mounting
Status lights Status lights
Status lights (8 results) Show all
Compact signal lights Compact signal lights
Industrial controls Industrial controls
Industrial controls (212 results) Show all
Coupling relays / Timer relays Coupling relays / Timer relays
Coupling relays / Timer relays (53 results) Show all
Coupling relays Coupling relays Solid state coupling relays Solid state coupling relays Timer relays Timer relays Accessories for relays Accessories for relays
Contactors / Main contactors Contactors / Main contactors
Contactors / Main contactors (51 results) Show all
Main contactors Main contactors Solid state contactors Solid state contactors Contactors Contactors Accessories for contactors Accessories for contactors
Disconnect switches Disconnect switches
Disconnect switches (39 results) Show all
Disconnects Disconnects Disconnect accessories Disconnect accessories
Monitoring relays Monitoring relays
Monitoring relays (69 results) Show all
Thermal overload relays Thermal overload relays Electronic overload relays Electronic overload relays Voltage monitoring relays Voltage monitoring relays
Circuit protection Circuit protection
Circuit protection (309 results) Show all
Circuit breakers Circuit breakers
Circuit breakers (217 results) Show all
Miniature circuit breakers Miniature circuit breakers Multichannel circuit breakers Multichannel circuit breakers
Circuit breakers for motors and starters Circuit breakers for motors and starters
Circuit breakers for motors and starters (72 results) Show all
Circuit breakers for motor protection Circuit breakers for motor protection Circuit breakers for starter combinations Circuit breakers for starter combinations Accessories for circuit breakers Accessories for circuit breakers
Surge protection Surge protection
Surge protection (20 results) Show all
Surge protection for power supply units Surge protection for power supply units Surge protection for MCR technology Surge protection for MCR technology Surge protection for data technology Surge protection for data technology
Drive technology Drive technology
Drive technology (47 results) Show all
Motor starters / Load feeders Motor starters / Load feeders
Motor starters / Load feeders (11 results) Show all
Compact motor starters Compact motor starters
Variable frequency drives Variable frequency drives
Variable frequency drives (20 results) Show all
SINAMICS V20 VFDs SINAMICS V20 VFDs SINAMICS V20 accessories SINAMICS V20 accessories
Speed monitoring Speed monitoring
Speed monitoring (3 results) Show all
Speed sensors Speed sensors Speed monitors Speed monitors
Encoders Encoders
Encoders (13 results) Show all
Incremental encoders Incremental encoders Encoder accessories Encoder accessories
Enclosures / Control cabinets Enclosures / Control cabinets
Enclosures / Control cabinets (689 results) Show all
Enclosures Enclosures
Enclosures (137 results) Show all
Polycarbonate enclosures Polycarbonate enclosures Steel enclosures Steel enclosures Stainless steel enclosures Stainless steel enclosures
Compact control cabinets Compact control cabinets
Compact control cabinets (85 results) Show all
Polycarbonate control cabinets Polycarbonate control cabinets Steel control cabinets Steel control cabinets Stainless steel control cabinets Stainless steel control cabinets
Cable glands / Cable entry systems Cable glands / Cable entry systems
Cable glands / Cable entry systems (311 results) Show all
Polyamide cable glands Polyamide cable glands Brass cable glands Brass cable glands Stainless steel cable glands Stainless steel cable glands EMC cable glands EMC cable glands Divisible cable glands Divisible cable glands Cable entry systems Cable entry systems Blind plugs Blind plugs
Wire & cable management
Wire & cable management (20 results) Show all
Wire Duct Wire Duct
Enclosure accessories Enclosure accessories
Enclosure accessories (136 results) Show all
DIN rails DIN rails Mounting plates Mounting plates Mounting accessories for enclosures Mounting accessories for enclosures Locking systems Locking systems Control cabinet receptacles Control cabinet receptacles Fan-and-filter units Fan-and-filter units Enclosure heaters Enclosure heaters Other enclosure accessories Other enclosure accessories
Industrial lighting Industrial lighting
Industrial lighting (35 results) Show all
Machine lighting Machine lighting
Machine lighting (32 results) Show all
Surface mount lights Surface mount lights Machine lights Machine lights Signal lights Signal lights Accessories for machine lighting Accessories for machine lighting
Workstation lighting Workstation lighting
Workstation lighting (3 results) Show all
System lights System lights
Connection technology Connection technology
Connection technology (773 results) Show all
Sensor / actuator wiring Sensor / actuator wiring
Sensor / actuator wiring (238 results) Show all
M8 sensor cables M8 sensor cables M12 sensor cables M12 sensor cables Micro AC sensor cables Micro AC sensor cables 7/8" Mini sensor cables 7/8" Mini sensor cables DIN valve cables DIN valve cables M8 patch cables M8 patch cables M12 patch cables M12 patch cables M8 connectors, field wireable M8 connectors, field wireable M12 connectors, field wireable M12 connectors, field wireable DIN connectors, field wireable DIN connectors, field wireable M8 wiring blocks M8 wiring blocks M12 wiring blocks M12 wiring blocks Splitters Splitters Sensor cables / Master cables Sensor cables / Master cables
Terminal blocks Terminal blocks
Terminal blocks (284 results) Show all
Feed-through terminal blocks, screw connection Feed-through terminal blocks, screw connection Feed-through terminal blocks, push-in connection Feed-through terminal blocks, push-in connection Terminal block accessories Terminal block accessories Terminal labels Terminal labels
Cables / Wires Cables / Wires
Cables / Wires (170 results) Show all
Data cables Data cables Control cables Control cables Power cables Power cables Servo cables Servo cables RJ45 patch cables RJ45 patch cables D-sub cables D-sub cables Hook-up wires Hook-up wires Wire / Cable labels Wire / Cable labels
Industrial connectors Industrial connectors
Industrial connectors (60 results) Show all
Rectangular connectors Rectangular connectors Panel interface connectors Panel interface connectors
Installation & assembly material Installation & assembly material
Installation & assembly material (21 results) Show all
Grounding clamps Grounding clamps Insulated wire end ferrules Insulated wire end ferrules
Power supply Power supply
Power supply (59 results) Show all
Switched-mode power supplies Switched-mode power supplies
Switched-mode power supplies (43 results) Show all
DIN rail mounted power supplies, 24 V DC DIN rail mounted power supplies, 24 V DC DIN rail mounted power supplies, 12 V DC DIN rail mounted power supplies, 12 V DC
Transformers Transformers
Transformers (16 results) Show all
Control and isolation transformers Control and isolation transformers Buck-Boost transformers Buck-Boost transformers
Work tools Work tools
Work tools (170 results) Show all
Hand tools Hand tools
Hand tools (113 results) Show all
Wire / Cable strippers Wire / Cable strippers Crimping tools Crimping tools Wire and cable cutters Wire and cable cutters Screwdrivers Screwdrivers Pliers Pliers Universal tools Universal tools
Tool kits Tool kits
Tool kits (20 results) Show all
Tool sets Tool sets
Marking systems Marking systems
Marking systems (57 results) Show all
Thermal transfer printers Thermal transfer printers Terminal markers Terminal markers Wire / Cable markers Wire / Cable markers Device labels Device labels Printer accessories Printer accessories
0 Shopping basket
$0.00

Your shopping basket is currently empty

Items in shopping basket 0

Your shopping basket is currently empty

Results ()

Automation24 uses cookies in order to guarantee the best possible service. If you continue browsing this site, you agree to the use of cookies.

I agree
Trustpilot
Siemens
  • LOGO! 24RCE
  • LOGO! 8.2
  • Logic module with display
  • Power supply: 24 V AC/DC
  • 8 DI (Digital Inputs)
  • 4 DO (Digital Outputs)Relay
  • Memory: 400 blocks
  • modularly expandable
  • Ethernet
  • Integrated web server
  • User-defined web pages datalogging
  • Standard micro SD card
  • for LOGO! SOFT COMFORT from version 8
  • older projects executable
Log in and write a review

Logic module Siemens LOGO! 24 RCE - 6ED10521HB080BA0

Obsolete - replaced by: 404155
Item number: 103714
UPC / EAN: 804766530043
Corresponding accessories
Expansion module Siemens LOGO! DM16 24 - 6ED10551CB100BA2
Expansion module Siemens LOGO! DM16 24 - 6ED10551CB100BA2
LOGO! DM16 24 expansion module, Voltage supply inputs: 24 VDC, Outputs: 24 VDC/transistor, 8 DI (Digital Inputs), 8 DO (Digital Outputs) for LOGO! 8
Item number: 101754
MSRP: $162.00
$145.80
plus sales tax plus shipping
in stock
Shipping today
Expansion module Siemens LOGO! DM16 24R - 6ED10551NB100BA2
Expansion module Siemens LOGO! DM16 24R - 6ED10551NB100BA2
LOGO! DM16 24R expansion module, Voltage supply inputs: 24 VDC, Outputs: relay, 8 DI (Digital Inputs), 8 DO (Digital Outputs) for LOGO! 8
Item number: 101759
MSRP: $176.00
$158.40
plus sales tax plus shipping
in stock
Shipping today
Expansion module Siemens LOGO! DM8 12/24R - 6ED10551MB000BA2
Expansion module Siemens LOGO! DM8 12/24R - 6ED10551MB000BA2
LOGO! DM8 12/24R expansion module, Voltage supply inputs: 12/24 VDC, Outputs: relay, 4 DI (Digital Inputs), 4 DO (Digital Outputs) Relay for LOGO! 8
Item number: 101758
MSRP: $108.00
$97.20
plus sales tax plus shipping
in stock
Shipping today
Expansion module Siemens LOGO! DM8 24 - 6ED10551CB000BA2
Expansion module Siemens LOGO! DM8 24 - 6ED10551CB000BA2
LOGO! DM8 24, Expansion module, Voltage supply inputs: 24 VDC, Outputs: 24 VDC/transistor, 4 DI (Digital Inputs), 4 DO (Digital Outputs) for LOGO! 8
Item number: 101753
MSRP: $100.00
$90.00
plus sales tax plus shipping
few in stock
Shipping today
Expansion module Siemens LOGO! DM8 24R - 6ED10551HB000BA2
Expansion module Siemens LOGO! DM8 24R - 6ED10551HB000BA2
LOGO! DM8 24R expansion module, Voltage supply inputs: 24 VAC/DC, Outputs: relay, 4 DI (Digital Inputs) NPN, 4 DO (Digital Outputs) Relay, For LOGO! 8
Item number: 101757
MSRP: $108.00
$97.20
plus sales tax plus shipping
in stock
Shipping today
Expansion module Siemens LOGO! AM 2 AQ - 6ED10551MM000BA2
Expansion module Siemens LOGO! AM 2 AQ - 6ED10551MM000BA2
LOGO! AM2 AQ expansion module, Voltage supply: 24 VDC, 2 AO (Analog Outputs), 0-10 V or 0/4-20 mA, for LOGO! 8
Item number: 101762
MSRP: $189.00
$170.10
plus sales tax plus shipping
in stock
Shipping today
Expansion module Siemens LOGO! AM2 - 6ED10551MA000BA2
Expansion module Siemens LOGO! AM2 - 6ED10551MA000BA2
LOGO! AM2 expansion module, Voltage supply: 12/24 VDC, 2 AI (Analog Inputs), 0-10 V or 0/4-20 mA, for LOGO! 8
Item number: 101760
MSRP: $132.00
$118.80
plus sales tax plus shipping
in stock
Shipping today
Expansion module Siemens LOGO! AM2 RTD - 6ED10551MD000BA2
Expansion module Siemens LOGO! AM2 RTD - 6ED10551MD000BA2
LOGO! AM2 RTD expansion module, Voltage supply: 12/24 VDC, 2 AI (Analog Inputs), -50-200 °C, Pt100/Pt1000 for LOGO! 8
Item number: 101761
MSRP: $159.00
$143.10
plus sales tax plus shipping
few in stock
Shipping today
Power supply Siemens LOGO! POWER 24V 1.3A - 6EP33316SB000AY0
Power supply Siemens LOGO! POWER 24V 1.3A - 6EP33316SB000AY0
LOGO! POWER, Stabilised power supply, Input: 100-240 V AC, 1 phase, Output: 24 V DC/1.3 A, 38 watt, Protection class: IP20, DIN rail mounting
Item number: 103608
MSRP: $75.00
$66.75
plus sales tax plus shipping
in stock
Shipping today
Power supply Siemens LOGO! POWER 24V 2.5A - 6EP33326SB000AY0
Power supply Siemens LOGO! POWER 24V 2.5A - 6EP33326SB000AY0
LOGO! POWER, Stabilised power supply, Input: 100-240 V AC, 1 phase, Output: 24 V DC/2.5 A , 60 watt, Protection class: IP20, DIN rail mounting
Item number: 103609
MSRP: $100.00
$89.00
plus sales tax plus shipping
in stock
Shipping today
Power supply Siemens LOGO! POWER 24V 4.0A - 6EP33336SB000AY0
Power supply Siemens LOGO! POWER 24V 4.0A - 6EP33336SB000AY0
LOGO! POWER, Stabilised power supply, Input: 100-240 V AC, 1 phase, Output: 24 V DC/4 A, 96 watt, Protection class: IP20, DIN rail mounting
Item number: 103610
MSRP: $137.00
$121.93
plus sales tax plus shipping
currently out of stock
Est. mfr. lead time 5 days
Order now or activate the availability alert or request a date of delivery toll free at 800-250-6772.
Due to supply chain shortages, many manufacturers are exceeding standard lead times.
Corresponding accessories
Configuration software Siemens LOGO! Soft Comfort 8 - 6ED10580BA080YA1
Configuration software Siemens LOGO! Soft Comfort 8 - 6ED10580BA080YA1
LOGO! Soft Comfort V8.3, single license for 1 installation E-SW, SW and documentation on DVD, 6 languages, executable on Windows XP, 7, 8, 10 (32- and 64-bit), Mac OSx 10.7 Lion to incl. Mac OSx El Capitan, Linux SUSE 11.3, SP3, K 3.0.76
Item number: 101763
MSRP: $81.00
$72.90
plus sales tax plus shipping
in stock
Shipping today
Text display Siemens LOGO! TDE - 6ED10554MH080BA0
Text display Siemens LOGO! TDE - 6ED10554MH080BA0
LOGO! TDE text display, LOGO! 8.2, 6-line, 3 background colors, 2 Ethernet ports, Installation accessories, for LOGO!
Item number: 103727
MSRP: $210.00
$195.00
plus sales tax plus shipping
currently out of stock
Est. mfr. lead time 5 days
Order now or activate the availability alert or request a date of delivery toll free at 800-250-6772.
Due to supply chain shortages, many manufacturers are exceeding standard lead times.
Technical details
General data

Logic module with display
8
4 (Relay)

Electrical data

24 V AC/DC
20.4-28.8 V DC
10 A at resistive load; 3 A at inductive load
External protection required

Mechanical data

72(4 MW)x90x55
On 35 mm DIN rail (4 MW) or wall mounting

Ambient conditions

-20 °C
55 °C
IP20

Further information

typ. 480 h (no battery)
Ethernet (not included)
400 blocks
Internal memory/SD card
Yes, with saving to the PC

Classification

8537109100

Product description
Logic module Siemens LOGO! 24 RCE - 6ED10521HB080BA0
The LOGO! 24 RCE - 6ED1052-1HB08-0BA0 logic module from Siemens with color-changeable display has an IP20 protection rating and works with a power supply of 24 V AC/DC. Up to 400 function blocks can be processed. The device has 8 digital inputs and 4 digital outputs (relays) available. The LOGO! 24 RCE - 6ED1052-1HB08-0BA0 micro PLC is programmable via Ethernet interface. Moreover, it can communicate with other modules of the LOGO! series and SIMATIC S7 devices. The integrated web server enables wireless monitoring and operation via smartphone, tablet or PC. In addition, user-defined web pages can be stored as visualizations. The LOGO! 24 RCE - 6ED1052-1HB08-0BA0 Siemens controller is used e. g. for machine controls in industrial and manufacturing processes, in building management technology, timing programs for traffic control systems as well as for use in pumps or filter systems. Special applications are also possible.

Take a closer look and find out here why LOGO! logic modules from Siemens are essential for automation technology
More Siemens
Customer reviews
Reviews 0
Reviews 0
Reviews 0
Reviews 0
Reviews 0
Show all reviews
Log in and write a review
Strong brands in automation technology