Watlow Series D8 - Manual (Page 57)

Series D8 User’s Guide Chapter 2: Installation
Doc. 0600-3120-2000 Watlow Anafaze 39
Figure 2.24 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 2.25
for wiring. The Serial DAC is user-configurable for voltage or
current output through firmware configuration. See Configur-
ing Serial DAC Outputs on page 176.
The Serial DAC optically isolates the controller’s control out-
put from the load. When a single Serial DAC is used, it may
be powered by the 5 Vdc 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 pro-
vide sufficient current; use the 5 Vdc output from the D8 pow-
er supply.
TB50 or TB18
PID Loop Output
Dual DAC
Vdc Load
12 to 24 Vdc Power Supply
+ -
+
+5V 1 +5V CTRL Supply 1
2
3
4
5
6
DZC CTRL PID Output
+12/24 Vdc External
Power Supply
+Vdc Load Connection
-mAdc Load Connection
-External Power
Supply/ Vdc Load
Connection
-