Field
Network
13 of 82
Publication S703E V1.1
Issue 06/09
PROCESSORS
AND
COMMUNICATIONS
SERIAL
PORT 1
SERIAL
PORT 2
POWER
SUPPLY
MAINS
SUPPLY
L
N
E
PS 720 MODULE
(CURRENT LOOP
CONTROLLER)
ETHERNET
PORT 3
ETHERNET
PORT 4
Port A OUT
If there is a signal earth bar, connect the
screen on one side only to the bar
SIGNAL EARTH BAR
Port A IN
Screen
A
B
C
SCR
Port B OUT
Port B IN
A
B
C
S
C
R
Actuator Terminals
A
B
C
SCR
EMERGENCY
SHUTDOWN
Screen
5
4
6
2
1
3
5
4
ALARM
1
2
3
Actuator Terminals
A
c
tu
a
to
r T
e
rm
in
a
ls
1 2
3
ETHERNET PORT 5
(CONFIGURATION)
Fig 9:
Pakscan P3F Current Loop System Block Diagram
Note: If there is no hard-wired ESD requirement, a shorting link must be fitted across pin 4
and 5 of the 5 pin plug.
