SPECIFICATIONS
INPUT VOLTAGE (Both Modules)—
24 Vdc nominal. Operating range is 18 to 30 Vdc.
Ripple cannot exceed 0.5 volts P-P.
POWER CONSUMPTION (Per Module)—
Transmitter
6.0 watts nominal @ 24 Vdc, 6.5 watts @ 30 Vdc.
12.2 watts peak @ 24 Vdc, 19.6 watts peak @ 30 Vdc.
Receiver Without Relays
6.0 watts nominal @ 24 Vdc, 6.8 watts @ 30 Vdc.
12.2 watts peak @ 24 Vdc, 20.5 watts peak @ 30 Vdc.
TRANSMITTER LAMPS
Two xenon flashlamps, field-replaceable module.
WARMUP TIME—
1 minute for transmitter. 30 seconds for receiver from
power-up when correctly aligned.
CURRENT OUTPUT—
Linear 4 to 20 mA (current source/sink, isolated/non-iso-
lated) rated at 600 ohms maximum loop resistance @ 24
Vdc operating voltage.
VISUAL STATUS INDICATOR—
Tri-color LED:
Red = gas alarm
Green = power on / OK
Yellow = fault / back-up lamp mode.
ALARM SETPOINT RANGE—
Low Alarm: 1 to 3 LEL-meters (default = 1)
High Alarm: 1 to 3 LEL-meters (default = 2).
Alarm setpoint is programmable using HART and MOD-
BUS communications.
DETECTION RANGE—
20 to 60 meters; 10 to 20 meters with accessory.
CALIBRATION—
OPECL systems are span calibrated for methane at the
factory.
Zero calibration is accomplished in the field by one of
three methods:
– On-board magnetic reed switch
– MODBUS communication
– HART communication.
Span calibration can be adjusted using HART or MOD-
BUS communication.
Refer to the “Calibration” section of this manual for
details.
RESPONSE TIME—
T90: <5 seconds.
TEMPERATURE RANGE—
Operating: –20°C to +60°C (–4°F to +140°F).
Storage: –55°C to +85°C (–67°F to +185°F).
HUMIDITY—
5 to 99% relative humidity; designed for outdoor appli-
cations.
OPERATING PRESSURE—
91.5 - 105.5 kPA non-compensated.
MEASUREMENT RANGE—
0-5 LEL-meters.
INTERFERENCE RESISTANCE—
Immune to sun and flare radiation, up to 750 W/m
2
≥ 3°
to optical axis and common contaminants.
SELF-DIAGNOSTIC TEST—
Fail-Safe operation ensured by performing all critical
tests once per second.
MODULE HOUSING MATERIAL—
CF8M stainless steel (castable 316 equivalent).
CONDUIT ENTRY OPTIONS—
Two entries, 3/4 inch NPT or 25 mm.
HART COMMUNICATION PORT—
Intrinsically safe port on receiver to connect HART
devices.
OPTICS PROTECTION—
Stainless steel brow provides a degree of protection
against windblown dirt and rain. Heated optics mitigate
against ice and dew formation. Heater can be turned
off for indoor applications or reduced power.
WIRING—
Field wiring screw terminals are UL/CSA rated for up to
14 AWG wire, and are DIN/VDE rated for 2.5 mm
2
wire.
Screw terminal required torque range is 3.5–4.4 in.-lbs.
(0.4-0.5 N·m). Transmitter requires power only.
Receiver can be wired using 3 or 4 wires.
5 95-85561.1
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