rotork Pakscan IIE System Manual page 14

Pakscan IIE System Manual
MASTER STATION B
MAINS INPUT
90 - 264 Vac
FUSE 1A
Fig 2: Pakscan IIE Master Stations – rear view
On the rear are the following items, repeated for both M/S A and M/S B.
Power Connector (IEC) for use with a.c. powered units (when a 24V dc supply is used this
is replaced by a terminal block). There is a 1 Amp slow blow fuse adjacent to the power
connection.
26 screw terminals for Field Connections, of these 25 only are used, and terminals 1 to 21
are directly linked internally to the 25 way D type connector (pins 1 to 21) above the
terminal block.
Two 9 way D type connectors for Comms Port 1, a male and a female. This port is always
RS485, 2-wire.
A single 9 way D type female connector for Comms Port 2. This port is always RS232.
There are two further connectors, 9 way D type female, for Ports 3 and 4. These are only
used if the optional RS232/485 Protocol Converter Module, PS410, is fitted, as described in
section 11.
One trailing RJ45 female socket for connection to the Ethernet server when one is fitted.
For host computer communications either serial or Ethernet connections can be used. The data format
for information exchange is Modbus RTU (for serial ports) or Modbus-TCP (for Ethernet LAN
connection). There are multiple data bases within the master station and these are explained later in
this manual.
Support for a printer to log alarms is provided. Each entry can be tagged with the time and date. There
are contact outputs for various alarm conditions, and provision for an Emergency Shutdown ('ESD')
input. Emergency Shutdown may be invoked by breaking the circuit between two terminals at the
master station causing an 'ESD' message to be broadcast on the current loop. Field units and
actuators may be set up to carry out an appropriate action, e.g. close a valve.
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Comms Port 1 (2xD-type)
PORT 1 PORT 2
RS485 RS232
FIELD CONNECTIONS
Field Terminals and D-type Connector
Publication S177E V2.0 Issue 03/05
MASTER STATION A
Comms Port 2 (D-type)
PORT 1
PORT 3 PORT 3
RS485
PORT 4 PORT 4
RS485 RS485
PORT PORT
EXP EXP
Ethernet (RJ45)
Data Label
PORT 2 MAINS INPUT
RS232 90 - 264 Vac
FUSE 1A
FIELD CONNECTIONS
IEC Power Connector