Watlow CAS200 - Manual (Page 33)

CAS200 User’s Guide Chapter 2: Installation
W atlow Anafaze 21
5. A third Ground connector on TB2 is available for chas-
sis ground. This terminal is connected to the CAS200
chassis and must be connected to earth ground.
NOTE! Connect the dc common of the power supply
used for loads to the dc common of the supply
powering the scanner. If the supplies are not ref-
erenced to one another, the scanner’s outputs
will not be able to switch the loads.
NOTE! When making screw terminal connections, tight-
en to 4.5 – 5.4 inch-pound (0.5 – 0.6 Nm).
ç
CAUTION! Without proper grounding, the CAS200 may not
operate properly or may be damaged.
ç
CAUTION! To prevent damage from incorrect connections,
do not turn on the ac power before testing the
connections as explained in Testing Power to the
Scanner on page 21.
NOTE! Do not connect the scanner’s dc common (COM)
to earth ground . Doing so will defeat the noise
protection circuitry, making measurements less
stable.
Testing Power to the Scanner
1. Perform a no-key reset by holding the " NO " key while
applying power to the CAS200. The no-key reset sets
all parameters to their defaults.
2. When powered up, the following screen should be
displayed on the scanner. If it is not, try repeating the
no-key reset.
CHANNEL PROCESS UNITS
CHANNEL NAME ALARM STATUS
RESET WITH
DEFAULTS ?