Overview
The Opto 22 G4PB16H is a G4 digital 16-channel I/O mounting rack with header connector, engineered for industrial automation control systems. This G4 mounting rack holds 16 G4 digital I/O modules, both AC and DC. Barrier strips with screw terminals provide the field and mounting rack power connections, eliminating the need for external terminal blocks.
Key Features
- Header connector accepts a standard 50-pin cable, the Optomux® E1 or B1, Pamux® B5 or Mistic™ B100 brain board for logic connections
- Insert and remove modules easily and quickly without disturbing field wiring; modules are secured with a threaded captive hold-down screw
- Two-position screw terminal for 5 VDC connects to the power supply, with power indicator light included
- Logic supply is fused with a 1A fuse
- Rack is compatible with Opto 22 PBSA/B/C power supplies
Technical Specifications
The G4PB16H provides a compact, modular platform for digital I/O applications in industrial control systems. Standard operating conditions include 0–70°C ambient temperature with 95% relative humidity (non-condensing). The rack accommodates single-channel G4 I/O modules for flexible field configuration.
Typical Applications
- Industrial process automation with Optomux or Pamux control systems
- Distributed I/O rack installations for multiple AC/DC digital modules
- Machine control and factory automation requiring modular I/O expansion
- PLCs and brain board–based control architectures using 50-pin interconnect
- Legacy system upgrades and equipment retrofits in manufacturing facilities
Compatibility & Replacements
Compatible With
- Optomux E1 and B1, Pamux B5, and Mistic B100 brain boards
- Digital I/O Carrier Board for Raspberry Pi® (part number OPTO-P1-40P)
- Opto 22 PBSA, PBSB, and PBSC power supplies
- Standard 50-pin cable interconnects
- G4 family digital I/O modules (AC and DC input/output)
Replaces / Drop-In Replacement For
The G4PB16H is the standard G4-generation header connector mounting rack. For systems requiring a common terminal block, the G4PB16HC provides an additional row of terminals. Verify compatibility with your system integrator before ordering.
Works With
- 50-pin header connector interface (Optomux/Pamux/Mistic protocol)
- Opto 22 G4 I/O module family (single-channel input and output relays)
- Industrial automation networks integrating discrete I/O logic
- 5 VDC power supplies with terminal-block connections



