Alarm Point Conditioner

Alarm Point Conditioner
Adaptable: The APC 36 Alarm Point Conditioner converts 36 alarm points to common-referenced (ground) contact closures. It is ideally suited for interfacing CMOS, TTL and bi-polar points to alarm remotes with common ground inputs.

Summary of Features

  • Adapts KDA inputs to battery, TTL or CMOS alarm sources
  • Distributes common alarm source to multiple network elements
  • 36 optically isolated bipolar alarm inputs
  • 36 relay-isolated outputs

Overview

The APC 36 Alarm Point Conditioner converts 36 alarm points to common-referenced (ground) contact closures. It is ideally suited for interfacing CMOS, TTL and bi-polar points to alarm remotes with common ground inputs.

Inputs
The APC 36 Alarm Point Conditioner has 36 optically isolated inputs. Each input has both sides of the optical coupler brought out to the edge connector. Input voltage range can be set with a jumper option for 5V, 12 to 24 V or 24 to 72V. Current flowing in an optical coupler normally is an alarm. This can be reversed with a jumper option.

Outputs
The APC 36 Alarm Point Conditioner has 36 relay isolated outputs. Each relay is operated by one of the 36 optically isolated inputs. Output contact configuration can be set with a jumper option to be normally closed or normally open when there is an alarm.

The APC 36 Alarm Point Conditioner is housed on a plug-in board that fits in a 1-3/4" rack-mount housing. The back of the housing provides wire-wrap pins for connecting the associated devices. The conditioner board can be changed rapidly without removing any of the wire-wrap connections.

The front panel of the APC 36 provides LEDs for monitoring unit activity. There is a fuse alarm indicator on the front panel and a fuse alarm output relay that activates when the fuse blows.

LEDs and relays normally operate when an alarm is present (current flowing in the optical coupler). This is reversed for any inputs that have the input reversal jumpers installed.

The APC 36 requires no software configuration.

The APC 36 operates on either -24 or -48 Volts DC (see model options).

Functional Schematic of the APC 36
A look inside: Functional Schematic of the APC 36 Alarm Point Conditioner.

LED Display Status
LED indicators on the front panel provide visual indication of alarm point status. Each of the 36 inputs has its own LED. LEDs that are On indicate alarms. LEDs that are OFF indicated inactive alarm points. The number above or below each LED designates the alarm points indicated by the LED.


Specifications

Dimensions: 17.0"(W) X 12.0"(D) X 1.75"(H)
Mounting: The conditioner can be mounted in a 19" or 23" rack. It can also be wall mounted
Power Input: 24 DC unit: -18 to -36 VDC @ 200 mA
48 DC unit: -36 to -72 VDC @ 180 mA (max) 30 mA (typical)
Fuse: 1/4 Amp
Operating Temperature Range: 0 degrees to +60 degrees Celsius. Allows mounting on the wall, frame or rack
Humidity: 0% to 95% non-condensing
Interface: 36 optically isolated inputs with both sides of the optical coupler brought to the edge connector. 36 relay isolated outputs, normally open or normally closed contacts
Relay Contacts (Controls and Fuse Alarm): Initial Contact Resistance: 50 milleohms
Contact Material: Gold-Clad Silver
Max. Switching Power: 60 W, 125 VA
Max. Switching Current: 1 A
Max. Carrying Current: 3 A
Electrical Life: 500,000 Operations (1 A @ 30 VDC)

Options & Model Numbers

Description Model Number
APC 36 Alarm Point Conditioner: 36 opto-isolated bipolar alarm inputs to 36 relay-isolated
outputs in KDA-type 1 rack-unit case. -18VDC to -72VDC (wide range).
D-PC-490-10A-00
APC 36 Alarm Point Conditioner (-24VDC): Same as above, except in -24VDC D-PC-490-10A-02
APC 36 Alarm Point Conditioner (+24VDC): Same as above, except in +24VDC D-PC-490-10A-03
APC 36 Alarm Point Conditioner (-48VDC): Same as above, except in -48VDC D-PC-490-10A-04

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