Emerson MRLDS Specifications download pdf (Page 7)

Specifications Overview • 1

1Overview

Retail Solutions specs a modular refrigerant leak

detection sensor (MRLDS) that continuously monitors for

low levels of refrigerants most commonly used in com-

mercial refrigeration systems.

The MRLDS communicates with the E2 controller via

direct connect MODBUS, a Gateway board connected to

the RS485 I/O Network, or via the analog input on a Mul-

tiFlex board.

1.1 Specifications

*De-icer: for environments below 32°F to keep ice from

forming on the surface of enclosure.

1.2 MRLDS Models

1.3 Powering The MRLDS

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.

Retail Solutions supplies several sizes of transformers

for powering multiple MRLDS units (three or more). Note

that polarity must be maintained when connecting more

than one MRLDS to a single transformer.

Power Require-

ments

24 VAC, ±20%, 50/60 Hz, Class 2

Wiring

14 AWG max, Class 2 copper wir-

ing

Power Consump-

tion

Less than 2.7 watts

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

Installation Cate-

gory

Range

0 to 1000 PPM

Minimum Detec-

tion

25 PPM

Pressure

Operating 10.2 to 15.7 PSIA

Repeatability

±10 PPM at 50 PPM

Linearity

See Table 6-2, “- Linearity Settings

for Supported Refrigerants,” on

page 18

Warm-up Time

30 minutes

Table 1-1 - MRLDS Unit Specifications

Figure 1-1 - Sensor Base Opening With Screw Terminals

Part Number Description

809-1000 Voltage Out w/o de-icer*

809-1001 Voltage Out with de-icer*

809-1010 Modbus w/o de-icer*

809-1011 Modbus with de-icer*

Table 1-2

- Available MRLDS Models

Part Number Transformer

Description

Number of

MRLDS Units

Powered

640-0039 24VAC, 10VA

Class 2

Up to 3

Table 1-3

- MRLDS Transformer Specifications

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.

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