Precision Digital PD6310 - Manual (Page 28)

Model PD6210 & PD6310 Batch Controllers Instruction Manual
28
2. RC networks may affect load release time of solenoid loads. Check
to confirm proper operation.
3. Install the RC network at the controller's relay screw terminals. An
RC network may also be installed across the load. Experiment for
best results.
Figure 16: Low Voltage DC Loads Protection
RC Networks Available from Precision Digital
RC networks are available from Precision Digital and should be applied
to each relay contact switching an inductive load. Part number:
PDX6901.
Note: Relays are de-rated to 1/14th HP (50 watts) with an inductive load.
4-20 mA Output Connections
Connections for the 4-20 mA transmitter output are made to the connec-
tor terminals labeled MA OUT. The 4-20 mA output may be powered
internally or from an external power supply.
12-35 VDC
Power
Supply
+
4-20 mA
Input Meter
-
+
R I- I+
1 3 2
RELAY1
3 2 1
24 V
-
4-20 mA Input
Remote Display,
Chart Recorder, Etc.
- +
R I- I+
MA OUT
1 3 2
RELAY1
3 2 1
24 V
MA OUT
Figure 17: 4-20 mA Output Connections
Analog Output Transmitter Power Supply
The internal 24 VDC power supply powering the analog output may be
used to power other devices, if the analog output is not used. The I+
terminal is the +24 V and the R terminal is the return. This power supply
is capable of sourcing up to 40 mA.
Use a diode with a reverse
breakdown voltage two to
three times the circuit vol-
tage and forward current at
least as large as the load
current.