GDS IR/LPI Quick Start Manual

Quickstart Guide
GDS-IR / LPI Infrared Sensor with
Loop-powered Indicator
INSTALLATION
IMPORTANT - Before installing the GDS-IR / LPI, make sure
there are no toxic or combustible gases are present.
Factors such as air movement, prevailing winds, convection, gas
density and emission sources should be taken into account when
determining sensor location. As with all sensors, the GDS-IR / LPI
should be protected from falling or directed water, snow, shock,
vibration and dirt.
The GDS-IR / LPI sensor may be mounted horizontally or
vertically (preferred). If horizontal, make sure the GDS-IR is
protected from dripping water. The Loop Powered Indicator LCD
can be rotated 90 degrees by opening the display cover, pulling
firmly on the display electronics, rotating the display and re-
installing (see Fig 2).
Use conduit and installation practices approved for the
appropriate area classification. When installed correctly, the GDS-
IR / LPI is suitable for use in areas rated Class 1, Div 1, Groups B,
C & D.
POWER & 4-20mA WIRING
Unscrew the cover from the LPI junction box. Firmly grasp the
display module and pull forward. The display module should
readily pop free from the mounting posts (see Figure 2).
NOTE: It is NOT necessary to remove any screws to
disassemble the Loop Powered Indicator
Connect the +DC power wire to TB1-1. Connect the DC power
common to TB1-2. The allowable DC voltage is +18 to +30 VDC
(See Figure 3).
The GDS-IR 4-20mA output signal is available at TB1-5.
Terminals 3 and 4 should remain shorted on the field wiring side .
NOTE: The GDS-54 Loop Powered Indicator is wired to TB1 via a
'plug-in' two position terminal strip. The terminal strip may contain
an optional built-in bypass zener diode that allows the display
module to be removed from the circuit without interrupting the
primary 4-20mA current loop.
NOTE: The GDS-54 Loop Powered Indicator does not provide
calibration capability for the GDS-IR 4-20mA output. If calibration,
adjustment, alarm relays or MODBUS® serial interface is
required, see the GDS Corp GASMAX II / GDS-IR gas monitor.
AUTHORIZED DISTRIBUTOR - GasDetectorsUSA.com - Houston, Texas USA
sales@GasDetectorsUSA.com
Fig 1. GDS-IR / LPI
GDS-54 "PLUG-IN"
DISPLAY MODULE
MOUNTING POST
(4 PLCS)
TERMINAL
STRIP TB1
Fig 2. Loop Powered Indicator Module
- 832-615-3588
Field Wiring Input
Auto-Zero
Magnetic
Switch
Loop-
Powered
Indicator
GDS-IR
Infrared
Detector
Note: Unit can be configured
for top conduit entry (shown) or
side conduit entry (standard).
Calibration Port
NEMA 7 ENCLOSURE
(SIDE VIEW)