Field Wiring - rotork Pakscan IIE System Manual

Pakscan IIE System Manual

7.3 Field Wiring

The field wiring includes the loop wires to the field units. The loop cable should have an overall
electrical screen. Particular attention should be paid to the connection of the screen on this cable.
The wiring should be in accordance with the diagram Fig. 9. (For connecting up a Hot Standby system
refer to section 10.)
Note that the system is a current loop, and that Port A Out, (terminal 12), connects via all the field
units to Port B In, (terminal 16), whilst Port B Out, (terminal 15), connects similarly to Port A In,
(terminal 13). If a coloured pair, red and blue, is used this results in say the red wires being in
terminals 12 and 16, with the blue wires in 13 and 15. The order is red, blue, blue, red.
Mains Port 1
Supply RS485
L N E
Power
Supply
PS210
Processors
and
Display
PS100
LK1
Pakscan IIE Master Station
Fig 9: Typical System Wiring Diagram
28 of 132
Ethernet
RJ45
NB2 PS602
Port 2
RS232
17
16
15
14
Field
13
Connector
12
11
10
10
11
12 Port A Out
13 Port A In
14
Port B Out
15
16 Port B In
17
18
19
20
21
22
23
These links must be fitted
when there is no PS300
24
Switch Module in the rack
25
Publication S177E V2.0 Issue 03/05
Emergency
Shutdown
Actuator Terminals
A C
Signal Earth Bar
Screen of 2 wire loop connected
directly to earth at one end only
Scr B
Actuator Terminals
Scr
B
C A