Emerson MRLDS Especificações descarregar pdf (Página 18)

12 • MRLDS I&O Manual 026-1307 Rev 4 28-JUN-2011

5.3.6 Wire Connections

Using shielded three-conductor network cable (Belden

#8641 or equivalent), connect the RS485 I/O Network

wire to the three-terminal connector on the Gateway board

as shown in Figure 5-9. For further information about

how RS485 networks are configured, refer to your site

controller’s user manual.

To connect the Gateway to an MRLDS, feed the wires

through the rectangular opening in the sensor base as indi-

cated in Figure 1-1. Locate the RS485 connector and

secure the wire leads to the connector orienting them as

shown in Figure 5-10. Connect multiple MRLDS units in

a daisy-chain configuration as shown in Figure 5-1.

5.3.7 Termination Settings

As part of a site controller’s RS485 I/O (COM A or

COM D) Network, a Gateway must be terminated if it is

the end device of a daisy chain. The Gateway on the Mod-

bus Network should always be terminated and always

located at the end of the daisy chain.

Refer to the site controller’s user manual for informa-

tion about daisy chain networks and how they are termi-

nated.

To terminate the Gateway (the Modbus jumpers should

always

be terminated on the Gateway), set the receiver bus

jumpers to the RIGHT position (Figure 5-11).

5.3.8 Gateway Board I/O Net

Addressing

Set the address on the I/O Network with switches 1-4.

There can be more than one MRLDS Gateway with each

supporting up to 12 MRLDS units.

Switch 5 indicates whether the MRLDS will be

mapped as an IRLDS or 16AI. Set switch 5 to the OFF

position for IRLDS emulation or to the ON position for

16AI emulation.

Figure 5-9

- Connecting the Gateway to the E2 RS485 Network

Figure 5-10 - Connecting the Gateway to MODBUS

GATEWAY BOARD

-485

+485

To MRLDS

MODBUS

MRLDS - INSIDE LOWER

PORTION OF BASE

GATEWAY BOARD

+485

-485

+485

-485

Shield

drain/ground

wire

Shield drain/

ground

wire

MODBUS

NETWORK

Figure 5-11 -MRLDS Gateway Termination

Figure 5-12 - Network Layout Example

RS485

I/O NET

(TO CPC

CONTROLLER)

RS485 I/O NET

TERM JUMPERS

TERMINATION

(ALWAYS

TERMINATE)

ADDRESS ON

I/O NET

I/O NET MODE

ON = 16AI

OFF = IRLDS

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Comentários a estes Manuais

Sem comentários

Emerson MRLDS Especificações Página 18

Comentários a estes Manuais