Keri Systems Eight-Door Concentrator User Manual

Eight-Door Concentrator

Keri Systems KDC-8 Eight-Door Concentrator places four controllers into one cabinet, reducing
the amount of space needed to mount four controllers. The concentrator is designed to fit in a
standard IT server/telecom rack, but can easily be wall mounted. There are knock-outs around the
outside of concentrator’s enclosure for cable routing.

1.0 Unit Specifications

• Height – 15 inches (plus 0.25 inches for the cover)

• Width – 17 inches (plus 0.25 inches for the cover)

• Depth – 6.5 inches (plus 0.25 inches for the cover)

• Weight – 19 pounds (including controllers and satellite boards, NOT including cabling)

• Power Requirements – 12 VDC @ 3 A for the concentrator cabinet, including four, two-door
controllers.

NOTE: Separately powered door lock power requirements depend upon the door locks being used.
Please ensure sufficient power is provided to support all door locks connected to the cabinet.

Figure 1: 8-Door Concentrator Enclosure

2.0 Mounting the Cabinet

There are three methods of cabinet mounting.

1. wall mounting through the rear of the cabinet

2. wall mounting using the rack brackets

3. rack mounting to a standard IT Server/Telecom rack

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Eight-Door Concentrator

2.1 Through the Cabinet Mounting

The easiest mounting method is wall mounting through mounting holes within the cabinet. There
are three key-hole screw slots and three screw through-holes for secure mounting. Have an assistant
hold the unit in the desired mounting place and mark the mounting locations, see Figure 2 (if there
are controllers in the cabinet, please remove them before mounting the enclosure). Drill pilot holes
in the marked locations and then install the unit.

Note: When fully loaded, the unit weighs 19 pounds (before cabling). Mount the unit securely
against the wall using molly-bolts or by securing at least two mounting screws to a wall stud.

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Figure 2: Through-the-Cabinet Mounting Dimensions

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Eight-Door Concentrator

2.2 Bracket Wall Mounting

Attach the brackets to the rear of the cabinet sides (see Figure 3). Have an assistant hold the unit in
the desired mounting place and mark the mounting locations. Drill pilot holes in the marked
locations.

Figure 3: Attaching the Brackets to the Enclosure for Wall Mounting

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Eight-Door Concentrator

Have an assistant hold the unit in the desired mounting place and mark the mounting locations (see
Figure 4). Drill pilot holes in the marked locations and then install the unit.

Note: When fully loaded, the unit weighs 19 pounds (before cabling). Mount the unit securely
against the wall using molly-bolts or by securing at least two mounting screws to a wall stud.

Quick Start GuideKDC-8

Figure 4: Wall Mounting the Enclosure Using the Brackets

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Eight-Door Concentrator

2.3 Rack Mounting

The cabinet is designed to be installed in a standard IT Server/Telecom rack using the two rack­mount brackets. Attach the brackets to the sides of the cabinet (see Figure 5).

Figure 5: Attaching the Brackets to the Enclosure for Rack Mounting

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Eight-Door Concentrator

Have an assistant hold the cabinet in the desired mounting place on the rack and secure the cabinet
using the rack mount screws (see Figure 6 and Figure 7 – a generic rack configuration is shown,
your rack may be slightly different).

Figure 6: Attaching the Unit to the Rack - Top View

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Figure 7: Attaching the Unit to the Rack - Front View

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Eight-Door Concentrator

3.0 Configuration and Wiring

It takes a lot of cabling to support all eight doors in the cabinet. Knockouts are provided on all four
sides, cabinet providing maximum flexibility for routing cables.

Cabinet configuration is kept simple. The only jumpers of which to be aware are the external door
lock power jumpers, and there are two front-cover LED cables.

3.1 External Door Lock Relays

The 8-door cabinet is designed to allow the door lock relays to operate in two ways.

1. Non-powered/dry-contact for use with devices such as a gate operator or as a non-powered
general purpose output.

2. Powered through the lock relay common for electric door locks. The unit can use one power
supply to drive both the controllers and the lock relays, or have separate power supplies, one for
the controllers and one for the door lock relays.

Each door lock relay can be set according to your application: non-powered/dry-contact or powered
for an electric door lock.

NOTE: When providing power for door lock relays, Keri strongly recommends using two separate
power supplies. This isolates controller power from the transients that can be created on the lock
power line as the door relays kick on and off. This will reduce controller interference.

The factory default is to have the following jumpers set per Table 1, allowing the use of external
lock power through the relay common. Refer to Figure 8 on page 8 for jumper locations.

Jumpers listed in Table 1 must be removed for any controller/satellite board relays used in non­powered/dry-contact mode or in non-powered, general purpose output mode.

Table 1: External Door Lock Power

Jumpers

Controller A-Door B-Door

Slot 1 J47 J44
Slot 2 J51 J50
Slot 3 J56 J55
Slot 4 J59 J58

KDC-8Quick Start Guide

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Eight-Door Concentrator

Quick Start GuideKDC-8

Figure 8: External Door Lock Power Jumpers

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