Liebert AC4 用户手册

Wiring and Connections

3.0

IRING

AND

ONNECTIONS

3.1

Wiring Specifications

Input and output connections to the AC4 may be made in any order—it is not necessary, for example,

to make all input connections before making any output connections. Use copper conductors only for

all wiring.

CAUTION

Switch OFF electric power to the AC4 before installing any wiring to the unit or changing

input or output connections. The Power On/Off switch is in the top left corner of the unit.

Table 4

Wiring specifications

Connection

Supported Wire Type

Maximum Wire Length

Rating

Digital

Input

18-22 AWG Stranded & Unshielded
18 AWG* (recommended)
Non Plenum - Belden 9740
Plenum - Belden 89740

750 ft. (225m)

Dry Contact

(24VDC, 10 mA)

Digital

Output

18-22 AWG Stranded & Unshielded
18 AWG* (recommended)
Non Plenum - Belden 9740
Plenum - Belden 89740

18 AWG*

(recommended)

20 AWG

22 AWG

24VAC @3A

@3A 50 ft. (15m)
@2A 100 ft. (30m)
@1A 200 ft. (60m)

@3A 40 ft. (12m)
@2A 60 ft. (18m)
@1A 100 ft. (30m)

@3A 25 ft. (7m)
@2A 35 ft. (10m)
@1A 75 ft. (23m)

Common

Alarm

Output

18-22 AWG Stranded & Unshielded
18 AWG* (recommended)
Non Plenum - Belden 9740
Plenum - Belden 89740

18 AWG*

(recommended)

20 AWG

22 AWG

24VAC @3A

@3A 50 ft. (15m)
@2A 100 ft. (30m)
@1A 200 ft. (60m)

@3A 40 ft. (12m)
@2A 60 ft. (18m)
@1A 100 ft. (30m)

@3A 25 ft. (7m)
@2A 35 ft. (10m)
@1A 75 ft. (23m)

Communication

RS232

Null Modem Cable

50 ft. (15m)

N/A

24VAC Power

Connection

(TB7)

18-22 AWG Stranded & Shielded
18 AWG* (recommended)
Non Plenum - Belden 8770
Plenum - Belden 88770

150 ft. (45m)

24VAC @1.3A

* Recommended