wheelock DCI-24-24 INSTALLATION INSTRUCTIONS

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INSTALLATION INSTRUCTIONS

DRY CONTACT INTERFACE

DCI-24-24

Use this product according to this instruction manual. Please keep this instruction manual for future reference.

GENERAL:

Wheelock's Dry Contact Interface (DCI-24-24) is a handy interface for powering telephone bells, chimes, horns, strobes and other
extension alerts for electronic key systems. The wall-mountable unit is a quick and convenient way to provide power for up to 5
signals. This capability can be doubled by simply using one DCI to actuate another.

The unit is attractively packaged for wall mounting and comes with a six foot power cord to reach a 115 VAC receptacle. Two wires
are directly connected from the dry contact closure of the key system unit (KSU) to the DCI input terminals. An extra input terminal
is provided on the DCI so it can also be activated by 24VDC if available at the KSU or at an individual telephone station set. One pair
of wires is run from the DCI output terminals to the alerts, through modular telephone terminal blocks.

NOTE: All CAUTIONS and WARNINGS are identified by the symbol All warnings are printed in bold capital letters.

WARNING: PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE USING THIS PRODUCT. FAILURE
TO COMPLY WITH ANY OF THE FOLLOWING INSTRUCTIONS, CAUTIONS AND WARNINGS COULD RESULT IN
IMPROPER APPLICATION, INSTALLATION AND/OR OPERATION OF THESE PRODUCTS IN AN EMERGENCY
SITUATION, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR DEATH TO YOU
AND/OR OTHERS.

INSTALLATION INFORMATION:

The various circuit configurations that the DCI could be used in are shown in Figures 1, 2 or 3.

Connect the DCI Dry Contact closure provided by electronic key system control unit or telephone set to drive up to 5 alert signals (see
rating chart for alerts) as shown in Figure 1.

Figure 1.

Connect more than one DCI to drive multiple alert signals (the 24VDC output of the DCI is wired to the 24VDC input terminals of a
second DCI (see rating chart for alerts) as shown in Figure 2.

Figure 2.

Copyright 1987, 1988, 1989, 1991, 1993, 1994 Wheelock, Inc. All rights reserved.

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Connect the DCI to 24VDC provided by electronic key system control unit or telephone set to drive up to 5 alert signals (see rating
chart for alerts) as shown in Figure 3.

Figure 3.

MOUNTING INFORMATION:

Hang the DCI vertically on the two mounting screws supplied. Space the screws vertically on 2" centers per Figure 4, within 6 feet of
a 115VAC power receptacle.

Connect all wiring as per Figures 1, 2 or 3. The DCI terminals accept #16 through #24 AWG. Strip insulation to expose 3/8" of bare
wire. Press in the orange tab above the appropriate terminals with a small screwdriver and insert the bare wire into the wire hole.
Release the tab to securely clamp the wire.

Tap the DCI enclosure several times to insure that the mercury reed relay within the DCI is cleared of excess mercury. After the
signals have been all wired up, check the resistance of the line that connects to the output of the DCI to insure it is not shorted, then
connect the input and output lines to the DCI. Plug in AC power cord. Check signal activation.

SPECIFICATIONS:

Table 1.

Input Specifications Output Specifications
Dry contact closure or Unregulated (filtered
Input Voltage 19.2-32VDC Nominal Output Voltage 24VDC
Input Current .030A Maximum Output Current .300A
Minimum Input Pulse ** .25 seconds Duty Cycle 33%
Fuse Rating *** 1/5A SLO Maximum On-Time Continues 2 Minutes

** The input pulse or ring cycle on-time must be a minimum of one second if a strobe signal is used.

*** If fuse replacement is necessary replace with San-O Fuse SD6-200 mA.

Figure 4: Mounting Template

(Not To Scale)

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