Watlow CAS - Manual (Page 28)

18 CAS User’s Guide
Installation
WARNING
Do not turn on AC power yet. First test the connections, as
explained in the Connections Test section (below).
Excessive voltage to the CAS will damage it, and you will need
to return it to Watlow Anafaze for repair. If you are not using
the Watlow Anafaze power supply, read the next section com-
pletely and follow its instructions before you apply power.
Connections Test
1. Unscrew the four screws on the sides of the front panel.
2. Gently slide the electronics assembly out of the case.
You have now removed the parts of the CAS which will be dam-
aged by excess voltage, so plug in the transformer power supply
and use a voltmeter to check voltages:
3. Touch the meter Common lead to Back Terminal Block 2 (TB2) ter-
minal 2 on the CAS. The voltage on TB2 terminal 1 should then be
+12 to 24 Vdc (no load).
4. If the voltages are within the limits described above,
A. Turn off power.
B. Slide the electronics assembly back into the processor module's
casing.
C. Reinsert screws into the screw holes on the casing and tighten
them.
D. Turn the power back on. The display should light up, and after
about a second the single channel display should appear.
5. If you have not connected analog inputs yet, the CAS may display a
"T/C Break" alarm message for each channel. This is normal; to
clear the alarm messages, press ALARM ACK once for each alarm
message.