Honeywell EXCEL 5000 OPEN ZAPP User manual

EXCEL 15 W7760C PLANT CONTROLLER

95-7611 6

HONEYWELL

W7760C

PLANT

CONTROLLER

M17295

Fig. 9. Transformer power wiring details for one W7760C

used in UL 1995 equipment (US only).

NOTES ON COMMUNICATIONS WIRING:

— When daisy chaining from one device to

another and using both sets of network screw

terminals on the W7760C, be aware that the

network is broken when the cover is unplugged.

If this is a problem, use one set of screw

terminals for both wire pairs.

— Do not bundle output wires with sensor, digital

input or communications LONWORKS® Bus

wires.

— Do not use different wire types or gauges on the

same LONWORKS® Bus segment. The step

change in line impedance characteristics may

cause unpredictable reflections on the

LONWORKS® Bus.

— In noisy (high EMI) environments, avoid wire

runs that are parallel to noisy power cables,

motor control centers, or lines containing

lighting dimmer switches; keep at least 3 in. (76

mm) of separation between noisy lines and the

LONWORKS® Bus cable.

— Each W7760C Plant Controller can support

three remote input/output (RIO) devices. For

more details on network topology rules, refer to

the E-Bus Wiring Guidelines, form 74-2865, or

see the W7760C System Engineering Guide,

form 74-3079.

— Make sure that neither of the LONWORKS®

network wires is grounded.

NOTE: If a 209541B Termination Module is required at the

plant controller, connect two of the three termination

module wires to the LONWORKS® network terminals.

Selecting the two appropriate wires depends on the

LONWORKS® network topology. For example, when

using a doubly terminated daisy-chained topology

with devices on either end of a LONWORKS® network

wire run, mount the termination module on the

appropriate terminals as shown in Fig. 10. Refer to

the E-Bus Wiring Guidelines, form 74-2865 and the

Excel 10 FTT Termination Module Installation

Instructions, form 95-7554.

565758 55 54 53 52 51 50 49 48 47 46 45

GNDAO

GND AO

GND

24VAC

LINE

24VAC

COM

GND

VDC

5&6

COM

32 31

1&2

COM

3&4

COM

7&8

COM

13 14

BUS

1 2

GND

1615

BUS

1 2

GND

CONNECT

POWER TO

TERMINALS

45 AND 47

EARTH

GROUND

EARTH

GROUND

TRANSFORMER

HONEYWELL

W7760C

PLANT

CONTROLLER

M17295A

LONWORKS®LONWORKS®

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