Document Part # 026-4417 Rev 2
Page 3 of 9
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3. Product Specifications
4. Installation
IMPORTANT:
The manufacturer of this product requires that a bump test or calibration be performed following
installation to verify installation to verify instrument functionality.
STEP 1: Mount Gas Detector & Remove Lid
CAUTION:
DO NOT allow the lid/sensor to hang from the ribbon cable. Failure to comply may result in damage to the product.
1. Mount the MRLDS-450 according to the product dimensions, maximum wiring lengths, and following
considerations:
•
Environment:
the full range of environmental conditions when selecting a location.
Size (HxWxD)
6.5” x 6.5” x 3.4”
(165 x 165x 87 mm)
Weight
1.05 lbs
(480g)
Indicators
Multi-color Status LED
Internal Alarm Buzzer: 72dB @ 3.9”
(10 cm)
Alarm Delay
Configurable
(0 to 15 minutes)
Inputs
Tactile Switches
(x2)
, Magnetic Switches
(x2)
Outputs
Analog Output: 1 to 5V (default), 0 to 5V, 0 to 10V, 2 to10V, or
4 to 20mA
Bluetooth®
Bluetooth® Low Energy, BLE 4.2
Modbus
Connection: RS-485 terminal block
Baud Rate: 9,600 or 19,200
(default)
Data Bits: 8
Parity: None, Odd, or Even
(default)
Stop Bits: 1 (default) or 2
Retry Time: 500 ms (minimum)
Power Supply
19.5 to 28.5 VDC or 24 VAC ±20%; 4W
Wiring (Power)
2-core cable, 16 to 28 AWG
Wiring (Relays)
2-core cable, 16 to 28 AWG
Wiring (Modbus)
Recommended: Belden 3106A (or equivalent) 3-core, 2 twisted pair +
ground, shielded cable with 120
Ω
characteristic impedance,
16 to 28 AWG
Enclosure
Material: ABS
Protection: IP66
Temperature
Semiconductor: -40°F to 122°F (
-40°C to 50°C)
Electrochemical: Ranges vary by gas type and / or concentration,
see the MRLDS-450 user manual
(P/N 026-1316)
for a full list of
temperature ranges.
Infrared: -40°F to 122°F
(-40°C to 50°C)
Catalytic Bead: -40 to 122°F
(-40°C to 50°C)
Humidity
5 to 90% RH, non-condensing
Pressure
23.6 to 32.5”Hg
(800 to 1,100 mbar)
Elevation
0 to 6,560’
(3,000 m)
altitude
Table 2 - Product Specifications
