Emerson MRLDS operation manual Specifications, Mrlds Models, Powering The Mrlds

1 Overview

CPC specs a modular refrigerant leak detection sensor (MRLDS) that continuously monitors for low levels of refrigerants most commonly used in commercial refrigera- tion systems.

The MRLDS communicates with the E2 controller via a Gateway board connected to the RS485 I/O Network, or via the analog input on a MultiFlex board.

1.1Specifications

Power Require-	24 VAC, ±20%, 50/60 Hz, Class 2
ments
Wiring	14 AWG max, Class 2 copper wir-
	ing
Power Consump-	Less than 2.7 watts
tion
Output Options	1-5V, 10 K Ohm load
	RS485 Modbus RTU
Operating Temp.	32 to 149°F (-22 to 149°F with
	de-icer*)
	0 to 65°C (-30 to 65°C with
	de-icer*)
Humidity	0 to 99% non-condensing
Size	4.5” x 3.5” x 1.6”
Weight	.35 lbs. (160 g)
Pollution Degree	2
Installation Cate-	II
gory
Range	0 to 1000 ppm
Minimum Detec-	25 ppm
tion
Pressure	Operating 10.2 to 15.7 PSIA
Repeatability	±10 ppm at 50 ppm
Linearity	±10 ppm from 25-50 ppm,
	±20% of reading from 60 to 1000
	ppm
Warm-up Time	30 minutes

Table 1-1- MRLDS Unit Specifications

*De-icer: for environments below 32°F to keep ice from forming on the surface of enclosure.

Figure 1-1- Sensor Base Opening With Screw Terminals

1.2MRLDS Models

Part Number	Description
809-1000	Voltage Out w/o de-icer*
809-1001	Voltage Out w/ de-icer*
809-1010	Modbus w/o de-icer*
809-1011	Modbus w/ de-icer*

Table 1-2- Available MRLDS Models

1.3Powering The MRLDS

Part Number	Transformer	Number of
	Description	MRLDS Units
		Powered
640-0039	24VAC, 10VA	Up to 3
	Class 2
Table 1-3- MRLDS Transformer Specifications

The MRLDS unit requires a separate UL Listed/CSA Certified 24VAC Class 2 transformer power supply. One 24VAC, 10VA Class 2 transformer is sufficient for up to three (3) MRLDS units.

CPC supplies several sizes of transformers for power- ing multiple MRLDS units (three or more). Note that polarity must be maintained when connecting more than one MRLDS to a single transformer.

WARNING: The MRLDS unit must be always be powered by either a suitable UL 60950/CSA Certified power supply that is isolated from line voltage by double insulation, or an appropriately rated

UL Listed/CSA Class 2 transformer. Failure to follow the above can result in serious personal injury or death.

Specifications Overview • 1