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STEP 3 WIRING THE CONTROLLER
WIRING CONNECTIONS
All wiring connections are made to the rear screw terminals. When wiring the controller, use the numbers on the label and those
embossed on the back of the case, to identify the position number with the proper function.
All conductors should meet voltage and current ratings for each terminal. Also, cabling should conform to appropriate standards of
good installation, local codes and regulations. It is recommended that power (AC or DC) supplied to the controller be protected by a
fuse or circuit breaker. Strip the wire, leaving approximately 1/4" (6 mm) bare wire exposed (stranded wires should be tinned with
solder). Insert the wire under the clamping washer and tighten the screw until the wire is clamped tightly.
CONTROLLER POWER CONNECTIONS
For best results, the power should be relatively “clean” and
within the specified limits. Drawing power from heavily loaded
circuits or from circuits that also power loads that cycle on and
off should be avoided. It is recommended that power supplied to
the controller be protected by a fuse or circuit breaker.
INPUT CONNECTIONS
For two wire RTDs, install a copper sense lead of the same gauge and length as the RTD leads. Attach one end of the wire at the probe
and the other end to input common terminal. Complete lead wire compensation is obtained. This is the preferred method. If a sense wire is
not used, then use a jumper. A temperature offset error will exist. The error may be compensated by programming a temperature offset.
CONTROL AND ALARM OUTPUT CONNECTIONS
VDC
VAC
RTD and Resistance Thermocouple and Millivolt
Voltage and Current
Alarm Models
Main Control Relay Models
Main Control Logic/SSR Models
ANALOG DC OUTPUT CONNECTIONS
USER INPUT CONNECTIONS
*AL1 becomes main control O1, if selected for heating in the
analog out models.
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