Watlow Dual DAC - Manual (Page 2)

WATLOW DAC User’s Guide 2
Wiring the DAC
A DAC module includes two identical cir-
cuits. Each can convert a controller's DZC
or burst fire signal to an analog voltage or
current signal. Devices that are driven by
analog signals are often sources of electri-
cal noise. Without the proper isolation
noise may interfere with the controller's
operation. To isolate the measurement and
control circuits from such noise, power
DAC modules with a dc power supply that
is isolated from the controller's power sup-
ply.
Several DAC modules may be powered by
one power supply. Consult Specifications
for the DAC’s power requirements.
Operation
Before operating your DAC:
• Make sure the jumpers have been set
for the desired output signal type. See
Configuring DAC Outputs.
• Select Distributed Zero Crossing (DZC)
as the output type for the correspon-
ding loop or channel.
To test the DAC:
1. Select the loop to be tested.
2. Set the control output to manual mode.
3. Set a percent output level.
4. Use a volt or current meter to verify
the output level.
Measur
ement
& Contr
ement
& Contr
ol
DU
AL DA
C
See
Manual
for
safe
operation
instructions
ASSY NO
: 10045-
SERIAL NO:
4-20mA
0-5Vdc
0-10Vdc
MADE IN
TH
E USA
DA
C 1
1
2
3
4
5
6
+5V IN
DA
C IN
+10-24V IN
V OUT
I OUT
OUT C
OM
DA
C 2
1
2
3
4
5
6
+5V IN
DA
C IN
+10-24V IN
V OUT
I OUT
OUT C
OM
Holes for #8 (4 mm)
screws or bolts
1.75 in
44 mm
3.0 in.
76 mm
3.6 in.
91 mm
0.3 in.
8 mm
0.4 in.
10 mm
4.4 in.
112 mm
3.7 in.
94 mm
Figure 2. DAC with Current Output
Figure 3. DAC with Voltage Output
1 +5V CTRL supply
2 DZC signal
3 +12/24VÎ (dc) external
power supply
4 +VÎ (dc) load connection
5 -mA dc load connection
6 -external power supply
& VÎ (dc) load connection
+5V
control output
Load volts dc
+
–
Power Supply
12 to 24VÎ (dc)
+ –
Controller Output DAC
1 +5V CTRL supply
2 DZC signal
3 +12/24VÎ (dc) external
power supply
4 +VÎ (dc) load connection
5 -mA dc load connection
6 -external power supply
& VÎ (dc) load connection
+5V
control output
Load mA
+
–
Power Supply
12 to 24VÎ (dc)
+ –
Controller Output DAC
Figure 1. DAC Dimensions