Watlow Series 922 Retrofit - Manual (Page 15)

Starting Out, Chapter 1 7 WATLOW Series 922 User's Manual
"Read Me First."
Congratulations, you're about to become a fully-qualified user of the Watlow
Series 922! This versatile microprocessor-based ramping control is powerful,
yet simple to learn. A ramp progresses from one set point to another set point
over a period of time. In this chapter of the user's manual, you'll get an
overview of the 922 and its operation.
Figure 1 is a simplified view of the Series 922's capabilities. It is a 2-channel,
dual output per channel, microprocessor-based, 1/4 DIN-sized ramping
temperature control. The 922 accepts dual inputs, one per channel. This
includes Type J, K or T thermocouple, a 1° or 0.1° RTD input, or one of two
process inputs. You can order an external event output board with two or eight
auxiliary outputs. It has a full control temperature range, offset calibration, and
a front panel lockout feature.
Starting Out Chapter 1
Starting out with the
Watlow Series 922,
A 2-Channel Ramping Control
RS-422A or RS-423A (RS-232C Compatible)
Optional Computer Interface
Figure 1 -
Series 922 Input and
Output Overview
or
Remote Hold Input
Dual Inputs:
RTD, T/C or
Process Value
Event Input
8 Auxiliary
Outputs
2 Auxiliary
Outputs
Dual PID or ON/OFF
Outputs/Channel