I/O and signal modules
Digital input and output modules connect field signals to an industrial controller. Browse EtherCAT terminals, ET 200SP distributed I/O and S7-1200 signal modules by platform, signal direction and channel requirements.
Browse categoryI/O and signal modules products
Browse every published product classified in this category. Filter the list by model, condition or availability.
Showing 1–12 of 24
I/O and signal modules
Beckhoff EL1002 2-Channel Digital Input EtherCAT Terminal
EL1002
New Original
$999.00
I/O and signal modules
Beckhoff EL1004 4-Channel Digital Input EtherCAT Terminal
EL1004
New Original
$999.00
I/O and signal modules
Beckhoff EL1008 8-Channel Digital Input EtherCAT Terminal
EL1008
New Original
$999.00
I/O and signal modules
Beckhoff EL1012 2-Channel Digital Input EtherCAT Terminal
EL1012
New Original
$999.00
I/O and signal modules
Beckhoff EL1014 4-Channel Digital Input EtherCAT Terminal
EL1014
New Original
$999.00
I/O and signal modules
Beckhoff EL1018 8-Channel Digital Input EtherCAT Terminal
EL1018
New Original
$999.00
I/O and signal modules
Beckhoff EL1024 4-Channel Digital Input EtherCAT Terminal
EL1024
New Original
$999.00
I/O and signal modules
Beckhoff EL1034 4-Channel Digital Input EtherCAT Terminal
EL1034
New Original
$999.00
I/O and signal modules
Beckhoff EL1084 4-Channel Digital Input EtherCAT Terminal
EL1084
New Original
$999.00
I/O and signal modules
Beckhoff EL1088 8-Channel Digital Input EtherCAT Terminal
EL1088
New Original
$999.00
I/O and signal modules
Siemens ET 200SP DI 8x24VDC ST 6ES7131-6BF01-0BA0
6ES7131-6BF01-0BA0
New Original
$999.00
I/O and signal modules
Siemens SIMATIC S7-1200 SM 1221 16 DI 24 V DC 6ES7221-1BH32-0XB0
6ES7221-1BH32-0XB0
New Original
$999.00
Browse products and selection paths
Use the current product families or the selection checklist to narrow the requirement.
Product family
Beckhoff EL1xxx Digital Input EtherCAT Terminals
Beckhoff EL1xxx EtherCAT Terminals acquire binary input signals for higher-level automation systems, with variants organized by signal voltage, channel count, connection technology and input-filter time.
Product family
SIMATIC S7-1200 Classic
Siemens SIMATIC S7-1200 Classic is the established compact-controller platform for small automation systems. This collection covers standard Classic CPUs and their matching signal and communication modules, kept separate from the newer S7-1200 G2 platform.
Product family
SIMATIC ET 200SP Digital I/O Modules
Digital input and output modules for the SIMATIC ET 200SP distributed I/O system. Select by signal type, channel count and BaseUnit requirements.
Product family
SIPLUS S7-1200
Siemens SIPLUS S7-1200 products extend the S7-1200 controller platform for demanding environmental conditions, with CPUs, signal modules, communication options and fail-safe I/O available for compact automation systems.
Product families in this category
Browse the published collections associated with this product role.
Beckhoff EL1xxx Digital Input EtherCAT Terminals
Beckhoff EL1xxx EtherCAT Terminals acquire binary input signals for higher-level automation systems, with variants organized by signal voltage, channel count, connection technology and input-filter time.
View collectionSIMATIC ET 200SP Digital I/O Modules
Digital input and output modules for the SIMATIC ET 200SP distributed I/O system. Select by signal type, channel count and BaseUnit requirements.
View collectionSIMATIC S7-1200 Classic
Siemens SIMATIC S7-1200 Classic is the established compact-controller platform for small automation systems. This collection covers standard Classic CPUs and their matching signal and communication modules, kept separate from the newer S7-1200 G2 platform.
View collectionSIPLUS S7-1200
Siemens SIPLUS S7-1200 products extend the S7-1200 controller platform for demanding environmental conditions, with CPUs, signal modules, communication options and fail-safe I/O available for compact automation systems.
View collectionSpecify the signal and the host system together
An I/O module must match both the controller or coupler platform and the electrical behavior of the field circuit.
- 01
Match the host platform
Identify the controller, bus coupler and terminal or BaseUnit system before selecting a module.
- Host family
- Bus or backplane
- BaseUnit or terminal arrangement
- 02
Define each field signal
Record input or output direction, signal voltage, channel count and sensor or load wiring.
- Digital input or output
- Signal voltage
- Channel count
- 03
Check channel and installation limits
Compare input thresholds or output load limits, grouping, isolation and terminal requirements using the exact module documentation.
- Input behavior
- Load rating
- Terminal assignment
Where this equipment fits
Follow the component role through the installed automation system.
Sensors and switches
Field wiring
I/O terminal or module
Coupler or backplane
Controller
Planning a replacement
Capture the installed model and application context before selecting replacement equipment.
- 01
Record the complete I/O module order number and host platform.
- 02
Preserve terminal assignments, channel grouping and wiring documentation.
- 03
Check the replacement module configuration and parameter settings.
Related engineering guides
guide
SIMATIC ET 200SP BaseUnit selection guide
Choose an ET 200SP BaseUnit from the electronic module requirement, terminal arrangement, potential-group design and current budget—not from color or appearance alone. This guide explains the Siemens designation and a defensible selection workflow.
Read guideguide
Wiring ABZ encoders to PLC high-speed counters
A practical method for matching an incremental encoder to a PLC high-speed counter: identify A/B/Z behavior, verify the electrical interface, calculate input frequency, wire single-ended or differential signals, and commission direction and index functions without relying on wire colors alone.
Read guideI/O and signal modules questions
Practical checks for identifying, selecting and replacing controller hardware.
Can EtherCAT terminals and ET 200SP modules be interchanged?
They belong to different I/O systems. Select the module for its supported coupler, backplane and terminal arrangement; equal channel counts do not establish compatibility.
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