Peripheral Installation

Door Phone/Door Lock with DDCB Interface

Door Phone/Door Lock with DDCB Interface

The Strata CTX supports up to eight DDCB door phone control boxes. Each DDCB supports up to three MDFB door phones which provides a total of up to 24 door phones (see Figure

12-15). Each DDCB can provide a door unlock control relay in place of one of the door phones.

DDCB and MDFB Cabling

For DDCB and MDFB wiring/interconnecting details and door lock control installation procedures and secondary protection information, refer to Chapter 10 – MDF PCB Wiring. If using 24 AWG cable, the length of the cable run from the Strata CTX to the MDFB (via the DDCB) must not exceed 1,000 feet (305 meters).

DDCB cable runs must not have cable splits (single or double), cable bridges (of any length) or high resistance or faulty cable splices.

1873

1874

DDCB Wall Mounting

The DDCB is designed to be mounted on a wall or other vertical surface.

To mount the units

1. Locate the two mounting holes on the right-hand side on the DDCB (see Figure 1493 12-14).

2.Remove the side cover from the DDCB to expose the two left-hand mounting holes.

3.Position the DDCB adjacent to the Base KSU with regard to wiring needs.

4.Secure the DDCB to the mounting surface with four one-inch panhead wood screws.

External Power Straps

(DDCB Only)

KSU

Jack

MDFB

Jack

A~C

KSU

 

 

Mounting

 

 

 

 

PHONE

A

Screws (4)

B

DOOR

 

 

 

C

 

Figure 12-14 Door Phone (DDCB) Installation

Door Phone Wire Connections

Up to 24 door phones can be connected to the Strata CTX system. Door phones are connected as follows: Up to three MDFB, door phones can connect to a single DDCB door phone control box, which in turn connects to a single DKT interface port (See Figure 12-16for door phone wiring diagram). Only one of the three connected door phones can be active at a given point in time.

12-14

Strata CTX I&M 06/04

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Toshiba CTX28 manual Ddcb and Mdfb Cabling, Ddcb Wall Mounting, Door Phone Wire Connections, 12-14, To mount the units