Wheelock MT4-12-LS Průvodce řešením problémů stáhnout pdf (Strana 13)

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Section 3. INSTALLING REMOTE KEYPADS

This section provides the following information:

• A list of keypads that may be used

• Instructions for wiring and mounting the keypads

• A preliminary check-out procedure to ensure that the keypads are

functioning properly in the system

General

When used as a slave DACT, a keypad is not required, but may be used to

provide supplementary DACT status annunciation. The keypad may be

mounted wherever needed. When used as a stand-alone control, rather than

a dialer, a keypad must be used and it must be mounted to an electrical box

within 3 feet of the control with the wiring run in conduit.

Keypads That May Be Used

• Fixed-Word Display: 6137, 6137R

• Alpha Display: 6139 and 6139R

• Independent of the restrictions on keypads for stand-alone control usage, the

5110XM supports up to 4 keypads provided that the 350mA current rating is

not exceeded for aux. power and for the system as a whole. Fixed word and

alpha keypads may be used in the same installation.

Many municipalities require that fire alarm annunciators be red in color.

Check with the authority having jurisdiction before choosing a keypad color for

your installation.

Wiring To The Keypads

1. When used as a stand alone control, mount the keypad within 3 feet of the

control. #22 AWG may be used to make connections to the control and

must be run in conduit. When used as a slave DACT, there are no

restrictions. Remote keypads may be wired to a single run or individual

keypads may be wired to separate wire runs. Use the table below to

determine the length of any single wire run based on the total loading on

that run. The length of all wire runs combined must not exceed 900 feet if

unshielded cable is used. If shielded cable is used, the combined wire run

length must not exceed 450 feet.

DACT Wire Run Length Chart

Wire Size 100mA 200mA 300mA 350mA

#22 250' 125' 80' 71'

#20 400' 200' 130' 110'

#18 625' 310' 200' 170'

#16 900' 450' 300' 250'

Example: If you have two keypads on one wire run that draw a total of 200mA,

and you are using #20 AWG wire, the distance from the Control Aux

(+ ) and Aux (–) terminals to the last device can be up to 200 feet.

2. Run field wiring from the control to the keypads (using standard 4-

conductor twisted wire cable using the wire gauge determined in step 1).

3. Connect remote keypads to terminals 17, 18, 19, and 20 on the control

board, as shown in Figure 3.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 75 76

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