Connecting A Hart Field Communicator - GasTech D-Guard2 Operator's Manual

16.

Connecting A HART Field Communicator

2
For D-Guard detectors that are fitted with HART communications, interaction with the detector may be done via a
HART master communication device such as a HART field communicator / configurator or a system controller.
2
HART enabled D-Guard detectors are optionally fitted with an IP68 rated connector (communications port) to allow
convenient connection to a field communicator.
Before connecting any communications device to the D-guard
that the equipment is safe to use within the hazardous area classification that the detector is installed into.
The terminal parameters of the communications device MUST be compatible with those stated in this
manual for the D-Guard
lead to dangerous and potentially life threatening conditions being created
A suitable cable to connect between a standard field communicator and the D-Guard
Connections at the communicator are polarity independent.
To start communications, open the communications port waterproof cap and plug the data connector into the port.
2
D-Guard is by default set to polling address 0 and is set for point to point (variable current loop) operation.
2
D-guard does not use Device Description type files and will be discovered as a generic device to a field communicator.
Once successful communication has been established, the HART communication icon will start to flash (refer to
section 13.1.1).
For complete details regarding D-Guard
(This document is available from the Gastech website www.gastech.com.au/dguard-2).
Remove the waterproof cap to access the communications port. Note that the detector is rated IP68 ONLY if this cap or the
mating connector are in place. Without the cap or connector fitted rating is IP66 only.
2
communications port. Failure to adhere to either of these requirements could
2
HART communications, refer to the D-Guard
52
2
communications port, the user MUST check
2
is available from GasTech.
2
HART specification document
2
D-Guard