ProtEX-MAX PD8-6001 Explosion-Proof Feet & Inches Meter Instruction Manual
19
F4 Digital Input Connections
A digital input, F4, is standard on the meter. This digital
input is connected with a normally open contact across
F4 and COM, or with an active low signal applied to F4.
4-20 mA Output Connections
Connections for the 4-20 mA transmitter output
are made to the connector terminals labeled MA
OUT. The 4-20 mA output may be powered
internally or from an external power supply.
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.
Interlock Relay Feature
As the name implies, the interlock relay feature reassigns one, or more, alarm/control relays for use as
interlock relay(s). Interlock contact(s) are wired to digital input(s) and trigger the interlock relay. This
feature is enabled by configuring the relay, and relative digital input(s) (see page 42). In one example, dry
interlock contacts are connected in series to one
digital input which will be used to force on
(energize) the assigned interlock power relay
when all interlock contacts are closed (safe). The
interlock relay front panel LED flashes when
locked out. The interlock relay would be wired in-
series with the load (N/O contact). See below.
Figure 17. Interlock Connections
Figure 15. F4 Digital Input Connections
Figure 16. 4-20 mA Output Connections
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
