Installation-Wiring
38 WATLOW Series 1500 User's Manual Installation - Wiring, Chapter 3
CHASSIS GROUND
L2
L1

Power Supply Input, Temp & RH Control Output

115VAC

For 115VAC control operation,
install a jumper wire from
Terminal 32 to Terminal 35, and
a separate jumper wire from
Terminal 33 to Terminal 36.
Bring line power in to Terminals
32 (L2B) and 36 (L1A). Connect
the line ground wire to Terminal 34.

230VAC

For 230VAC control operation,
install a jumper wire from Terminal
33 to Terminal 35. Bring line
power in to Terminals 32 (L2B)
and 36 (L1A). Connect the line
ground wire to Terminal 34.
Figure 17 -
Power Supply
Input, CH-1 &
CH-2 Output
Connections
CHASSIS GROUND
L1
L2
Required when running Ch-1 TEMP control
without Ch-2.

RTD T/C

1. Select TT=1 for TEMP-TEMP operation.
Refer to Page 46, Figure 21.
2. Install a 107Ω resistor between Terminals
8 and 9, plus a jumper wire between
Terminals 9 and 10.
1. Put a jumper between Terminals 8 and 10.
Figure 18 -
Wiring to Disable
Channel 2
NOTE:
For thermocouple
inputs, the 107Ω
resistor can be
used in place of
the jumper.
NOTE
k

To Disable Channel 2

RTD T/C
CAUTON:
Total absence of
connections on
Terminals 8, 9,
and 10 will create
an alarm condi-
tion.
CAUTON:
Fuse load and
power outputs
properly. Failure
to do so could
cause damage to
your equipment
and property.

S1

S2

S3