Datacom Systems D56 Průvodce řešením problémů stáhnout pdf (Strana 16)

–16–

SUPPLEMENTARY

POWER SUPPLY

–

CONTROL

TERMINAL STRIP

AUX AUX. DATA DATA

– + IN OUT

4567

IMPORTANT:

MAKE THESE

CONNECTIONS

DIRECTLY TO

SCREW

TERMINALS AS

SHOWN.

TO KEYPAD RED WIRE

TO KEYPAD BLK WIRE

TO KEYPAD YEL WIRE

TO KEYPAD GRN WIRE

TO KEYPAD BLK WIRE

TO KEYPAD RED WIRE

TO KEYPAD GRN WIRE

TO KEYPAD YEL WIRE

Figure 7. Using A Supplementary Power Supply For Keypads

Preliminary Check-out Procedure

If you want to check that the system is working before connecting field wiring

from zones and devices, do the following:

1. Temporarily connect a 2000 ohm end-of-line resistor across each of the

basic hard-wire zones 1–8, as shown in the Summary of Connections

diagram.

Without actual zone wiring or EOL resistors connected, the keypads of the

system will not display the “Ready” message.

2. Power up the system temporarily by plugging the AC transformer

(previously wired to the control) into a 120VAC outlet.

3. B u s y – S t a n d b y (Alpha keypads) or dI (Fixed-word keypads) will be

displayed.

After approximately 1 minute*, the green “READY” LED (or “POWER”

LED on some types of keypads) should light, and the words READY

ENTER CODE (Fixed-word keypads), or **SYSTEM READY** (Alpha

keypads) should be displayed.

* To bypass the 1-minute delay, press [#] plus 0.

If the READY ENTER CODE display does not appear on any of the keypads

in the system, or a “Not Ready” message is displayed, check the keypad

wiring connections, and make sure each of the 8 basic hard-wired zones

has a 2000 ohm resistor connected across its terminals.

4. When you get the proper READY ENTER CODE displays on the keypad(s),

the system is functioning properly at this point.

Do not remove the EOL resistors until you are ready to make connections

to the hard-wired zones, to allow for testing later in the manual.

If an OC or OPEN CIRCUIT is present on the keypad, data from the control is

not reaching the keypad. Please check the wiring.

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