Honeywell excel 10 w7753a 사용자 설명서

95-7520—02

4

Refer to E-Bus Wiring Guidelines, form 74-2865, for a 

complete description of E-Bus network topology rules. 

Approved cable types for E-Bus communications wiring are 

Level IV 22 AWG (0.34 mm

2

) plenum and non-plenum rated 

unshielded, twisted pair, solid conductor wire. For nonplenum 

areas, U.S. part AK3781 (one pair) or U.S. part AK3782 (two 

pair) can be used. In plenum areas, U.S. part AK3791 (one 

pair) or U.S. part AK3792 (two pair) can be used. 

Communications wiring can be run in a conduit, if needed, 

with non-switched 24 Vac or sensor wiring. If a longer E-Bus 

network is required, a Q7740A 2-way or Q7740B 4-way 

repeater can be added to extend the length of the E-Bus. Also 

a Q7751A Router can be added to partition the system into 

two segments and effectively double the length of the E-Bus. 

Only one router is allowed with each Excel 10 Zone Manager, 

and each network segment can have a maximum of one 

repeater.

Pull the cable to each device on the E-Bus and connect to 

communication terminals 14 and 15 (W7753A).

NOTES: (For Communications Wiring)

—

All field wiring must conform to local codes and 

ordinances (or as specified on the installation 

drawings).

—

Approved cable types for E-Bus communications 

wiring is Level IV 22 AWG (0.34 mm

2

) plenum 

and non-plenum rated unshielded, twisted pair, 

solid conductor wires. For nonplenum areas, U.S. 

part AK3781 (one pair) or U.S. part AK3782 (two 

pair) can be used. In plenum areas, U.S. part 

AK3791 (one pair) or U.S. part AK3792 (two pair) 

can be used.

—

Unswitched 24 Vac power wiring can be run in the 

same conduit as the E-Bus cable.

—

Do not bundle output wires with sensor, digital 

input or communications E-Bus wires.

—

Do not use different wire types or gauges on the 

same E-Bus segment. The step change in line 

impedance characteristics would cause unpre-

dictable reflections on the E-Bus. When using dif-

ferent types is unavoidable, use a Q7751A Router 

at the junction.

—

In noisy (high EMI) environments, avoid wire runs 

parallel to noisy power cables, motor control cen-

ters, or lines containing lighting dimmer switches, 

and keep at least 3 in. (76 mm) of separation 

between noisy lines and the E-Bus cable.

—

Each daisy-chained E-Bus segment that is on one 

side of a Q7751A,B Router (can contain up to 60 

Excel 10s) and has a length greater than 1640 ft. 

(500m) must have two E-Bus 209541B 

Termination Modules, one at each end of the 

daisy-chain wiring run.

—

Make sure that neither of the E-Bus wires is 

grounded.

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

UV controller, connect two of the three termination 

module wires to the E-Bus terminals. Selecting the 

appropriate two wires depends on the E-Bus network 

topology. Refer to the E-Bus Wiring Guidelines, form 

74-2865, and the Excel 10 FTT Termination Module 

Installation Instructions, form 95-7554. For example, 

using a doubly terminated daisy-chained bus topol-

ogy, if controllers are on either end of an E-Bus wire 

run, mount the termination module on the appropri-

ate terminals as shown in Fig. 7.

M12682

24 VAC

120/240 VAC

TRANSFORMER

W7753A

EARTH

GROUND

24

25

1

W7753A

EARTH

GROUND

24

25

1

W7753A

EARTH

GROUND

24

25

1

M12680

24 VAC

LINE VOLTAGE

GREATER

THAN 150 VAC

TRANSFORMER

W7753A

EARTH

GROUND

EARTH

GROUND

IF THE W7750 CONTROLLER IS USED IN UL 1995 EQUIPMENT AND THE 

PRIMARY POWER IS MORE THAN 150 VOLTS, GROUND ONE SIDE OF 

TRANSFORMER SECONDARY.

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1

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