rotork p3 - Configuring Serial Communications; Setting Port 1 and 2 for RS-232 or RS-485; Fig 25: Pakscan P3 Chassis, CPU and Key Switch Modules Removed

4. Configuring Serial Communications
Issue 06/15 Publication PUB059-002-00 31 of 136
Port 1
Port 2
P
3
P
3
PS720
IIE Loop
Standby
Port A
Port B
P
3
PS720
IIE Loop
Standby
Port A
Port B
P
3
PS700
CPU/PSU
Port 1
Port 2
Option 1
Option 2
Switch
A
B
CЄ
Option 2
Option 1
CPU/PSU
Not Cross
Connected
Cross
Connected
Port Terminations
Off
On
On
Off
1
2
Port 1
Port 2
RS-232
RS-485
Port Terminations
Off
On
On
Off
1
2
Port 1
Port 2
Port 1
Port 2
Port 1
Port 2
A
Only
B
Only
Port 1
Port 1
Port 2
Port 2
rotork
rotork
rotork
rotork
rotork
RS-232
RS-485
4. CONFIGURING SERIAL COMMUNICATIONS
The Pakscan 3 CPU module has two serial ports. Each of these is configurable for RS-232 or RS-485.
Most hot standby systems will probably require two RS-485 connections in a seamless redundant
configuration. Single systems may use RS-232 or RS-485.
4.1 Setting Port 1 and 2 for RS-232 or RS-485
The chassis has DIP switches behind the PS710 CPU module for setting the type of serial port that is
presented at the port connectors.
Fig 25: Pakscan P3 Chassis, CPU and Key Switch modules removed
The switches on the backplane behind the PS710 CPU Module are used to set Port 1 and Port 2
parameters.
To access the switches, you will need to remove the modules shown above from the backplane.
To do this, power-off the master station completely from any power sources, either mains or DC. Then
unscrew the hex head bolt from the top of the module using the 2mm ball driver tool supplied with the
master station. Once the screw is removed, or loosened sufficiently, the module may be carefully
pulled forward at the top until the lower claws of the module can be unhooked from the slots in the
backplane.
If any plugs are left in the power sockets or serial sockets, these may prevent you from tipping the
module forward sufficiently to unhook it from the backplane.
Replacement of the module is the opposite of removal, being careful to align the module and
backplane connectors.
Select
Function
Select RS-485
Termination
Select RS-485
Cross
Connection
CPU Feedback
for Cross
Connection
Select
Function
Select RS-485
Termination