Cisco Systems manual Cisco Physical Access Gateway User Guide OL-20932-02

Chapter 3 Connecting a Cisco Reader Module

Physical Overview and Port Description

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Input interfaces

Three input interfaces used to sense the contact closure. Each input can be configured as supervised or unsupervised and can be configured to sense a Normally Open (NO) or Normally Closed (NC) contact.

•An unsupervised input senses a simple contact closure state, including Normal or Alarm. When connected to open contacts, the terminal voltage range is 4V to 5V. For closed contacts, the voltage range is 0V to 0.7V.

•A supervised input senses four contact states, including Normal, Alarm, Open and Short. These inputs require 1K End-Of-Line (EOL) termination resistors installed at the contacts (two resistors are included in the accessory kits for each Input port).

Output interfaces

Three Form C (5A @ 30V) relay output interfaces. Each output can be configured as either Normally Closed (NC) or Normally Open (NO).

•C & NO connection: The relay is normally open. The circuit is closed when triggered.

•C & NC connection: The relay is normally closed. The circuit is opened when triggered.

Notes:

•Install surge protection between the output device and the Cisco PAM module, as described in the “Installing Surge Suppressors on Output Device Connections” section on page 1-13.

•Common (C) is always used, and either NC or NO is used to complete the connection.

•All Generic Output devices installed in Cisco PAM systems prior to release 1.1.0, were connected to the Gateway, Reader, or Output modules with the wiring reversed. If upgrading to Cisco PAM release 1.1.0 from an earlier release, disconnect all Generic Output devices and do the following:

–Connect Normally Open devices to the N.O. and C connectors on the Gateway, Reader, or Output module.

–Connect Normally Closed devices to the N.C. and C connectors on the Gateway, Reader, or Output module.

PF

Power fail input: an unsupervised input that raises a “power fail” alarm when the circuit is open. Can be configured as an additional unsupervised port. An unsupervised input indicates only normal or alarm. The corresponding LED is red when circuit is open (when no input is connected).

TM

Tamper input: an unsupervised input that raises a “tamper” alarm when the circuit is open. Can be configured as an additional unsupervised port. An unsupervised input indicates only normal or alarm. The corresponding LED is red when circuit is open (when no input is connected).

Cisco Physical Access Gateway User Guide

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