iTRANS 2
FIXED POINT SINGLE OR DUAL GAS MONITOR
WITH DUAL ANALOG OUTPUTS
USER MANUAL
Revision 7.0
Appendix A HART Interface
A.1 Introduction
IMPORTANT: This portion of the instruction manual is only applicable if your unit has
been shipped HART Enabled.
The fixed-point gas monitor is designed to provide continuous monitoring of hazardous
gases in the workplace. The is capable of displaying one or two gas concentrations as
well as sensor or instrument specific diagnostics.
The HART supported comes with a channel-1 4-
20mA output equipped with standard FSK HART interface
capability. The channel-1 HART output can be used to access
the process variables on digital control systems or a HART
handheld device can be used to access process variables of
from anywhere in the 4-20mA loop as long as the
handheld device is on the modem side of the 250 ohm load.
parameterization can also be accomplished through
HART interface.
channel-2 has a standard 4-20mA output. is available with an optional relay
board, allowing the device to directly control external devices such as fans, pumps, alarm horns,
or warning lights. Also there are three onboard relays available; two of the relays can be
programmed for alarm activation, while the third relay is a fault protection relay.
The is powered with a 24 VDC (12-28 VDC) power supply and provides a 4-20mA
control signal for each sensor.
For more details on specifications, supported sensor types, agency approvals and EU,
please see 1.
IMPORTANT: In 1, under “Specifications” section the “Signal Outputs” specification is replaced
with Table A - 1.
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