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5.11.2
PG Submodule
By means of the PG submodule, you can use the second interface of the CPU
as the PG interface and equally privileged with the first interface.
Application
The PG submodule can be inserted in the following CPUs:
Interface Submodule
PG submodule
Circuitry
The PG submodule is equipped with a transmitter and a receiver for 20 mA
current loop signals. The loop current is always fed in from the PG. The
following figure shows the circuitry for current loop signals of the standard
cable:
Figure 5-11
Data Transmission
The rate for data transmission via the PG interface is always 9600 bps.
Rate
System Manual
C79000-G8576-C199-06
CPUs, Memory Cards, Memory Submodules, Interface Submodules
For Use With
CPU 928B
CPU 948
+
Receiver
–
–
Transmitter
+
CPU with
PG Module
Current Direction Arrows
PG Submodule: Loop Current Direction
+
–
–
Transmitter
+
–
+
+
Receiver
–
PG
5-95
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