Current loop cable wiring, Figure 22: current loop wiring diagram(4 wire), Current loop cable wiring -25 – Connect Tech NT960/PCI User Manual
Page 77: Figure 22: current loop wiring diagram(4 wire) -25
Chapter 4: Appendix E - 20mA Current Loop Option
4-25
Intellicon-NT960/PCI User's Manual, ver. 0.02
Current Loop Cable Wiring
You can wire the ACM/Flex16 with the 20mA Current Loop
option in various ways to communicate with 20mA Current Loop
peripherals. This section describes an example of a Current Loop
cabling scheme.
Figure 22 describes a 4 wire cabling scheme between a port on
the ACM/Flex16 and another port on an external device.
Figure 22: Current Loop wiring diagram(4 wire)
RxD +
TxD +
RxD -
TxD -
7
8
TxD +
RxD -
RxD +
TxD -
2
1
ACM/Flex16 Port
DB-9 connector
External Device
Connector
External
Current
Source
+
-
+
-
External
Current
Source
Note:
The example above illustrates a 20mA Current Loop cable wiring
configuration between one port of the ACM/Flex16 and another
port of an external device.