Chromalox 3101 User Manual

Chromalox 3101 Operator's Manual 47
Following are typical connector pin designations
for comm-based data acquisition. Reference the
manufacturer’s specifi cations for computer inter-
connections.
Figure 9.3
RS232
Connector
Pin
Designations
(Typical)
2
3
4
5
6
RCV
XMT
DTR
GND
DSR
3
2
20
6
7
RCV
XMT
DTR
DSR
GND
DB - 9 DB - 25
RS422A Communications
RS422 defi nes a balanced interface with no
accompanying physical connector. Reference
manufacturer’s specifi cations for computer inter-
connections.
Figure 9.4
RS422A Wiring Connections (4-wire)
XMT+
21
GND
23
XMT-
22
XMT+
XMT-
GND
RCV-
20
RCV+
19
RCV+
RCV_
GND
23
XMT-
22
XMT+
21
RCV-
20
RCV+
19
3101 3101
Note: 270  resistors recommended across receive line on computer and last controller.
270 
270
Computer with RS422
Interface Card

Chromalox 3101 Specifications

General

Brand	Chromalox
Model	3101
Category	Controller
Language	English