
RACKS
CLASSIC
STANDARD DIGITAL
DATA SHEET
Form 477-060118
Description
The PB4H I/O mounting rack features a 50-pin header connector for easy 
interface to computer I/O ports via 50-conductor ribbon cables. The 50-pin 
connector also allows direct connection to Optomux (B1), Pamux (B5), and 
Mistic (B100) protocol brain boards. Any combination of Opto 22 standard 
(Generation 1) digital 5-Volt logic I/O modules can be used with PB4H.
page 1/3
Part
Number
PB4H 4-Channel Rack With Header Connector
Description
 

RACKS
CLASSIC
STANDARD DIGITAL
DATA SHEET
Form 477-060118
Specifications
General Specifications
Operating Temperature
Interface Connectors 
Field
Control
Powe r
Compatible I/O Module 
Family
Dimensions
page 2/3
0° to 70° C 
95%, Relative Humidity 
Non-condensing
6-32 Screw Terminals
50-conductor Header 
Connector
2-position Screw Terminal 
or Opto 22 PBSA/B/C 
Power S up ply
Standard (Generation 1) 
Digital 5-volt logic
PB4H
 

RACKS
CLASSIC
STANDARD DIGITAL
DATA SHEET
Form 477-060118
Schematics
page 3/3
PB4H
Module
Position
0471 & 2
1453 & 4
2435 & 6
3417 & 8
© 1991–2006 Opto 22. All rights reserved. All trademarks, trade names, logos, and service marks referenced herein belong to their respective companies.
Control
(Header
Connector)
Field
(Terminal
Strip)
1. Even pins on control connector are connected 
by etch to common.
2. +VCC and return connected to two point 
terminal strips
3. At each module position on the field terminal 
strip, the lower number is always connected 
to pin 1 of the I/O module.