System Wiring Example - Watlow Micro-Based Autotuning Control SERIES 980/985 User Manual

WARNING:
Install high or low temperature limit control protection in systems where an
overtemperature fault condition could present a fire hazard or other hazard.
Failure to install temperature limit control protection where a potential hazard
exists could result in damage to equipment and property, and injury to personnel.
1
CAUTION:
Do not jumper load power from the control power terminals. Doing so will cause
your control to be more susceptible to electrical interference from load switching.
See Noise Guidelines at the beginning of this chapter.
Earth
Ground
Load
Power
Fuse
Ll -
Heat
Load
Limit Sensor
Process Sensor
Install
and Wire, Chapter 2
115 Volt
Control Power
L2 L1
A A
Fuse
L2
Ll
Relay Contactor
coil Power
1
2 CAUTION:
With Watlow mercury relays, load
must have a unity power factor.
For RESISTIVE LOADS ONLY.
All fuses must be selected for
proper protection in a given
application.
High Liiit
Ll L2
Control Power
120 YAC
WATLOW Series 980/985 Use's Manual
Figure 24 -
System Wiring
Example
140A-16XX-6000
High Limit Control
21