Door Phone/Door Lock With Ddcb Interface; Ddcb And Mdfb Cabling; Ddcb Wall Mounting; Door Phone Wire Connections - Toshiba Strara CTX Series Installation And Maintenance Manual

Peripheral Installation

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
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
CW1308 0.5 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.

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
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.

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
diagram). Only one of the three connected door phones can be active at a given point in time.
8-14
Chapter 6 – MDF PCB
Figure 8-14).
Figure 8-15). Each
Wiring. If using
1493
Figure 8-14 Door Phone (DDCB) Installation
Figure 8-16
1873
External Power Straps
(DDCB Only)
Mounting
Screws (4)
for door phone wiring
Strata CTX I&M September 2002
1874
KSU
Jack
MDFB
Jack
A~C