Instruction manual

8
Before wiring, verify the correct model
number and options on the label. Switch
o
ff the power while checking.
Care must be taken to ensure that the
m
aximum voltage rating specified on
the label is not exceeded.
I
t is recommended that the power for
these units be protected by fuses or cir-
cuit breakers rated at the minimum
value possible.
All units should be installed inside a
suitably grounded metal enclosure to
prevent live parts from being accessible
to human hands and metal tools.
All wiring must conform to appropriate
standards of good practice and local
codes and regulations. Wiring must be
suitable for the voltage, current, and
temperature rating of the system.
Beware not to over-tighten the terminal
screws. The torque should not exceed
1 n-m (8.9 in-lb.)
Unused control terminals should not be
used as jumper points as they may be
internally connected, causing damage
to the unit.
Verify that the ratings of the output
devices and the inputs as specified in
chapter 6 are not exceeded.
Except for the thermocouple wiring, all
wiring should be stranded copper with a
maximum gauge of 18 awg.
2–3 Wiring Precautions
*Or low voltage (11-26 VAC/VDC) when ordered as specified. Non-polarized.
NOTE: ASTM thermocouples (American) the
red colored lead is always negative.
II