Overview
The Opto 22 IDC5B is a fast-switching DC digital input module designed for industrial automation applications. This G1 Series module provides high-speed signal conditioning with galvanic isolation between field inputs and control logic. The IDC5B accepts DC signals from 4–16 VDC and outputs 5 VDC logic levels, making it compatible with standard PLC and industrial controller inputs. With 4000V (transient) of optical isolation, the module protects downstream control circuits from voltage spikes and field noise.
Key Features
- Fast switching response: 0.05 ms turn-on, 0.1 ms turn-off time for rapid signal detection
- Optical isolation: 4000V (transient) isolation between input and output stages
- Low input current: 45 mA maximum at full line input voltage
- 5 VDC logic output: Direct compatibility with TTL and standard PLC input modules
- Wide input range: Operates reliably from 4–16 VDC input
- Compact form factor: Standard G1 Series module for DIN rail or backplane mounting
Technical Specifications
- Input Voltage Range: 4 to 16 VDC
- Input Current (Max): 45 mA
- Output Voltage (Logic): 5 VDC nominal (4.5–6 VDC range)
- Output Current: 50 mA
- Turn-on Time: 0.05 ms
- Turn-off Time: 0.1 ms
- Optical Isolation: 4000V (transient)
- Input Resistance: 300 Ohms
- Operating Temperature: –30 to +70 °C
- Supply Current: 12 mA @ nominal logic voltage
- Series: G1
Typical Applications
- Sensing photoelectric switch outputs in high-noise factory environments
- Detecting DC proximity sensor proximity signals with fast response
- Interfacing TTL-compatible devices (encoders, logic circuits) to industrial controllers
- Reading limit and selector switch status in motion control systems
- Data acquisition applications requiring low-cost, isolated digital inputs
- Process monitoring and equipment diagnostic circuits
Compatibility & Replacements
Compatible With
- Opto 22 SNAP PAC controllers and I/O backplanes
- Opto 22 groov EPIC edge programmable controllers
- Opto 22 groov RIO edge I/O systems
- G1 Series DIN-rail mounting systems
- Any PLC or industrial controller with 5 VDC logic input capability
- Standard industrial 24 VDC power supplies
Replaces / Drop-In Replacement For
- IDC5B modules from previous inventory lots
- Legacy Opto 22 G1 Series DC input modules with matching pin configuration
- Verify compatibility with your system integrator before ordering
Works With
- Opto 22 control software and configuration tools
- SNAP PAC Logic and groov Manage programming environments
- Standard Ethernet/IP networks when used with compatible Opto 22 controllers
- Industrial automation platforms supporting modular I/O expansion



