Watchdog NTC to F500 PGW CAI REV0 July 2014
7
2.
INSTALLATION INSTRUCTIONS
The Control Unit
The Control Unit box should be installed in a suitable control or starter switch room. The
box should have sufficient space to open the lid for wiring.
The Control Unit is susceptible to static voltage. Connection of a
clean ground to terminal 29 is essential for optimum
performance. Prior to this connection, static handling
precautions should be taken.
3
ELECRICAL WIRING
Refer to Drawings A, B, C & E
When installing the equipment in an area which is likely to be hazardous from Ignitable
Dusts, use liquid tight conduit and fittings and follow all local codes.
4
OPERATING INSTRUCTIONS
The Fieldbus Adapter is a self contained unit and there are a number of user configurable
options. The adapter is equipped with three communications ports; RS232, RS485 and
Profibus DP.
The RS232 is a simple interface which can be used for diagnostics purposes. The data
from this port is formatted to work with a VT100 display terminal. Any terminal or
terminal emulator capable of supporting the VT series or compatible commands can be
used with this port although the data has been optimised to work with VT100. The
RS232 port operates at a fixed data rate of 9600, N, 8, 1.
The RS485 port is a four wire, twin twisted pair full duplex serial port and has been
specifically configured to work with the Watchdog communications network. You
should not connect any other devices to this port unless you wish to monitor the
Watchdog data directly. If this is the case then contact your supplier for details relating
to the Watchdog communications protocol.
The Profibus interface provides the following:
Transmission media: Profibus bus line, type A or B specified in EN50170
Topology: Slave configuration
Fieldbus Connector: 9 pin female DSUB
Cable: shielded copper; twisted pair
Optically isolated bus A and B termination
Address range 1-99 selected by on board switch
Maximum cyclic I/O data size of 244 bytes
Optional bus termination, switch selectable
Led status indication
