Cooper Security 9751 Manual de instalación descargar pdf (Pagina 43)

3. Installation

496964 Page 35

Wiring a Keyswitch Interface

Figure 27 shows the connections for a 9928 Keyswitch Interface. You can fit

only one keyswitch interface in a system.

M/C

12V

CLK

ATA

SET

RDY

9928

COM

KS2

KS1

Full

Off

Part

Full

Part

AMP

Momentar y

Continuous

o keypad bus

on control unit.

Fixed

Momentary

Figure 27. Connecting a 9928 Keyswitch Interface

Momentary or Fixed Keyswitches

The 9928 can be connected to either a momentary or a latched keyswitch

(see Figure 27). When using a momentary keyswitch, remove the jumper from

link M/C. When using a fixed (or latched) keyswitch, fit a jumper to link M/C.

Notes:

1. If you connect a keyswitch through a keyswitch interface, it can be used

to set and unset the system. In a single system, it can set and unset the

whole system or Level B only. In a partitioned system, it sets and unsets

Partition A.

2. If you connect a keyswitch as a zone, without an interface, it can be used

to set and unset the level or partition to which the zone is assigned.

Communicator

Connecting the Communicator

The control unit has an internal communicator on its main PCB. This is an

auto-dialling modem. In the 9851, a different modem is used, for which the

baud rate can be set using Command 111.

If necessary, a standalone communication device can be connected through a

wiring harness to interface pins on the main PCB (this is known as a plug-by

communicator). The 9851 can also be fitted with a plug-on communicator,

plugged directly onto two connectors on the main PCB.

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Cooper Security 9751 Manual de instalación Pagina 43

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