Emerson MRLDS Operations Manual download pdf (Page 13)

MRLDS Gateway MRLDS Modbus Version (809-101x) • 7

bits with no parity and 2 (two) stop bits.

4.3 MRLDS Gateway

4.3.1 MRLDS Gateway Setup on

I/O Network

Modbus versions of the MRLDS must be connected to

the 810-3040 MRLDS Gateway. The MRLDS Gateway

can be mapped in either of two ways: it can be set up on

I/O Net as an IRLDS application or as a 16AI board.

Select by setting the Gateway’s dip switch #5 to the OFF

or ON position (Figure 4-6).

4.3.2 Gateway Connections

Up to 12 MRLDS units may be connected to the Gate-

way board (P/N 810-3040). The Gateway board can inter-

face with a site controller as a 16AI or as an IRLDS. If the

site controller is an Einstein or E2, it is recommended to

interface them as an IRLDS. Multiple Gateways can be

used, each with up to 12 connected MRLDS units.

4.3.3 The Gateway Board

Name

PDU

Address

Logical

Address

Range

Fault and

Module

State

0x0000 1 Under Range

2 (msb)

Under Volt-

age 8 (msb)

Temperature

10 (msb)

Lamp Fail

40 (msb)

Test Mode

80 (msb)

Warm Up

Complete

0 (Lsb)

Cal/Setup

2 (Lsb)

Factory

Mode

4 (Lsb)

Trouble

Mode

8 (Lsb)

Gas

Number

0x0001 2 0 to 40

Gas Con-

centration

0x0002 3 -20 to 1050

(ppm)

Gas

Numbers

R-22 = 6

R-404A = 27

R-134a = 15

Table 4-3

- RS485 Output Specifications

Figure 4-6 - I/O Network Modes

Figure 4-7 - MRLDS Gateway Board Layout (810-3040)

SELECT I/O NET MODE

OFF = IRLDS

ON = 16AI

ON = 16AIOFF = IRLDS

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 19 20

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