Watlow CPC400 - Manual (Page 54)

Chapter 2: Installation CPC400 Series User’s Guide
40 Watlow Anafaze Doc. 0600-2900-2000
Figure 2.28 Dual DAC with Voltage Output
Wiring the Serial DAC
The Serial DAC provides a robust analog output signal.
The module converts the proprietary Serial DAC signal
from the controller’s open collector output in conjunction
with the clock signal to an analog current or voltage. See
Figure 2.29 for wiring. The Serial DAC is user-configurable
for voltage or current output through firmware configura-
tion. See Configuring Serial DAC Outputs on page 162.
The Serial DAC optically isolates the controller’s control
output from the load. When a single Serial DAC is used, it
may be powered by the 5V
Î (dc) found on the TB50 or by an
external power supply referenced to the controller’s power
supply. When using multiple Serial DACs, the controller
cannot provide sufficient current; use the 5V
Î (dc) output
from the CPC400 power supply.
TB50 or TB18
PID Loop Output
Dual DAC
Vdc Load
12 to 24V О О О О (dc) Power Supply
+ -
+
+5V 1 1
2
3
4
5
6
-
+5V CTRL Supply
DZC CTRL PID Output
+12/24V Î (dc) External
Power Supply
+V Î (dc) Load Connection
-mAdc Load Connection
-External Power
Supply/ V
Î (dc) Load
Connection