P3F - Pakscan Master Station Technical Manual
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Publication S703E V1.1
Issue 06/09
Room should be left around the enclosure for all the connections and cables, allowing for suitable
bending radius on each lead. Power wiring should be suitably fused or protected with a miniature
circuit breaker (MCB) external to the master station.
The master station should be mounted on a flat surface using the mounting brackets provided. It
should be located in a way that permits easy opening of the front door and access to the internal
connectors and modules.
1.2 Serial Comms Connections
The serial data connections are via the Serial Comms terminal block located on the main circuit board
below the power supply and to the left of the DIN rail. This connector has screw terminals and plugs in
to the mating part fixed on the circuit board. The terminal connections are shown below.
Terminal
RS232
Connections
RS485
Connections
1 TX
2 RX Data
-
3 GND GND
4
Port 1
Data
+
5 TX
6 RX Data
-
7 GND GND
8
Port 2
Data
+
With RS485 it is possible to arrange a multi-drop data highway for the serial communications,
whilst RS232 must be single point comms.
1.3 Ethernet Comms Connections
Each Pakscan P3F master station has 3 x RJ45 Ethernet connectors for the host communication ports
and the service port. These are marked Port 3 and Port 4 (host communication ports) and Port 5
(service port). A portable computer (laptop) should be connected to Port 5, the service port, to set up
the P3F. Standard Ethernet shielded patch cables should be used with these ports.
1.4 Power Connector and Fuse
The Pakscan P3F has its own internal power supply and a three-way screw terminal connector at the
top of the main circuit board is provided to allow the mains power (85 to 265V AC – 47 to 63 Hz) to be
connected. The master station power fuse is located just below this connector and should be 250V 1A
fuse. For the 24V DC version the same three-way connector is used.
Fig 3:
Serial Comms connector terminal functions
4
1
2
3
8
5
6
7
Port 1
Port 2
