Product Specifications; Installation - Emerson MRLDS-450 Quick Start Manual

3. Product Specifications

Size (HxWxD)
Weight
Indicators
Alarm Delay
Inputs
Outputs
Bluetooth®
Modbus
Power Supply
Wiring (Power)
Wiring (Relays)
Wiring (Modbus)
Enclosure
Temperature
Humidity
Pressure
Elevation

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.
• Application: the specifics of the application (possible leaks, air movement/draft, etc.) when selecting
a location.
Document Part # 026-4417 Rev 1
©2020 Emerson Retail Solutions, Inc. This document may be photocopied for personal use.
Visit our website at http://www.emerson.com for the latest technical documentation and updates.
6.5" x 6.5" x 3.4" (165 x 165x 87 mm)
1.05 lbs (480g)
Multi-color Status LED
Internal Alarm Buzzer: 72dB @ 3.9" (10 cm)
Configurable (0 to 15 minutes)
Tactile Switches (x2), Magnetic Switches (x2)
Analog Output: 4 to 20mA (default), 0 to 5V, 0 to 10V, 1 to 5V or 2 to 10V
Bluetooth® Low Energy, BLE 4.2
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)
19.5 to 28.5 VDC or 24 VAC ±20%; 4W
2-core cable, 16 to 28 AWG
2-core cable, 16 to 28 AWG
Recommended: Belden 3106A (or equivalent) 3-core, 2 twisted pair +
ground, shielded cable with 120 Ω characteristic impedance,
16 to 28 AWG
Material: ABS
Protection: IP66
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)
5 to 90% RH, non-condensing
23.6 to 32.5"Hg (800 to 1,100 mbar)
0 to 6,560' (3,000 m) altitude
Table 2 - Product Specifications
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