Hardware reference guide

DIO
232
35013379 11/2011
140CRA21X20 Quantum Distributed I/O (DIO) Modules
Overview
This section includes specifications and wiring diagrams for the Modbus Plus
Distributed I/O DC powered single (CRA21120) and dual (21220) channel modules.
DIO Module
The following figure shows the parts of the Distributed I/O (DIO) module.
Specifications
The following specifications are for the Modbus Plus CRA21120 and CRA21220 DC
powered single and dual channel DIO modules.
Specifications
Input Requirements
Input Voltage 20 ... 30 Vdc
Input Current 1.6 A
Inrush Current 30 A
Input Power Interruption 1.0 ms max
Fusing (external) 2.5 A (Part #043503948 or equivalent)
Operating Mode Standalone or not powered (See Power and Grounding
Guidelines, page 725).