Emerson E2 Návod k obsluze stáhnout pdf (Strana 9)

designed for commercial HVAC and Refrigeration

applications. RS-485 hardware connections are used

at the network terminations and at each node

(compressor).

The Intelligent Store™ Discus® communication cable

terminates in the E2 Controller on the Network

Interface Board, and is routed to each of the

compressors in a daisy-chain format. Refer to figure

2.6 and figure 2.8.

Figure 2.6 RS-485 Daisy-Chain Configuration

One E2 controller can control two racks. Two RS485

connections are available on the Network Interface

Board for two parallel daisy-chain arrangements.

Refer to figure 2.7 for a photo of the Intelligent Store™

Discus® Network Interface Board.

Figure 2.7 Intelligent Store™ Discus® Network

Interface Board

Figure 2.8 Two Rack Daisy-Chain

One E2 controller can control 4 suction groups, with

up to 16 stages in each suction group. A compressor

with no unloader is one stage. A compressor with an

unloader would be counted as two stages.

2.5 Network Terminations and Cable

Routing

Each network node has 3 jumpers that must be

positioned to define whether or not the node is in the

middle or end of the daisy-chain. The last compressor

in the daisy-chain is “terminated” and the jumpers

must be set accordingly. The E2 jumpers on the

Network Interface Board are always set for “terminat-

ed” (refer to figure 2.11).

Refer to figure 2.10 for the location of the communi-

cations board in the Intelligent Store™ Discus® mod-

ule.

The communications wire to the compressor may be

routed through the rear of the side box (2D / 3D) or

through the rear of the terminal box in the 4D

compressor. Routing slots are also available on the

bottom of the front box. Consider protection of the

wiring from accidental pull-out when selecting the

routing option. From this perspective, using the

bottom of the front box may be an undesirable option.

If the bottom of the front box is used, a strain relief is

available and should be used as shown in figure 2.9.

Figure 2.9 Strain Relief for Communication Cable -

Alternate Routing

AE8-1337 R1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 70 71

Komentáře k této Příručce

Žádné komentáře

Emerson E2 Návod k obsluze Strana 9

Komentáře k této Příručce

Související produkty a manuály pro Dálková ovládání Emerson E2