Watlow CLS - Manual (Page 22)

14 CLS User’s Guide
Installation
Precautions and Warnings
DANGER
Shut off power to your process before you install the CLS.
High voltage may be present even when power is turned
off! Reduce the danger of electric shock after installation
by mounting the CLS in an enclosure that prevents per-
sonal contact with electrical components.
The CLS measures input signals that are not normally ref-
erenced to ground, so the CLS inputs and other signal lines
can have high voltage present even when power is turned
off--for example, if you inadvertently short a thermocouple
to the AC power line.
WARNING
During installation and wiring, place temporary covers
over the housing slots and the rear of the CLS so dirt,
pieces of wire, et cetera don't fall through the slots. Remove
these covers after installation.
Install the CLS so the slots in the housing receive unre-
stricted airflow after installation. Make sure that other
equipment does not block airflow to the housing slots.
Use #20 or #22 AWG wires and trim wire insulation to 1/4”
(5 mm). Wire should fit inside the terminal with no bare
wire exposed, to prevent contact between wires and the
grounded case. Tin any stranded wire.
Support power, input and output cables to reduce strain on
the terminals and to prevent wire removal.
NOTE
Be sure to select a panel location that leaves enough clear-
ance to install and remove the CLS and its components.