Watlow Series 945 High/Low Limit Control - Manual (Page 2)

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WATLOW Series 945 High/Low Limit User's Manual
General Description
Welcome to the Series 945, a 1/4 DIN microprocessor-based, audible alarm,
dual alarm relay, single input, high-low limit control. The 945 accepts a Type J,
K, T, N, C or Platinel 2 thermocouple, RTD, or process input.
The upper display provides process temperature information while the lower
display provides alarm status. Output 1 is a DC signal output used to drive an
external audible alarm. Output 2 and 3 are alarm relays that de-energize when
a limit condition exists.
Operator-friendly features include automatic LED indicators to aid in monitoring
and set-up, as well as a calibration offset at the front panel. The Series 945
automatically stores all information in a non-volatile memory.
Starting Out
Starting Out With The Series 945,
A Microprocessor-Based Limit Control
Figure 1 -
Series 945 Input and
Output Overview
Signal to Drive
an Audible Alarm
Dual Alarm
Relay Outputs
RS-422A, RS423A
(RS-232C compat-
ible), or EIA-485
Optional Computer
Interface
Single Input -
Type J, K, T,
N, C or Pt2
Thermocouple,
RTD or Process