Installation Guide

Document 51394 NION-2C8M-NCS Installation Rev. B 10/5/00

I/O Configuration and Connections

Inputs

The NION-2C8M accepts eight normally open or normally closed dry contact inputs. Each input is monitored by

an end-of-line resistor. These inputs are wired to a 16 point plug-in terminal strip in the following pattern:

Input 1 - Input 8 -

point 1 = input line through point 15 = input line

point 2 = common point 16 = common

The PCB is labeled and the terminals are numbered for convenience. Inputs are rated for 18V nominal, 1.8mA

maximum current and 2,000 ohm maximum resistance.

Each input circuit requires a 10k EOL resistor installed in parallel with the contact.

Each input is configured as NO/NC from the plug-in application.

Each input has a pair of diagnostic LEDs. For Normally Open (NO) contacts, the Red LED is ON when the point is

in alarm, and OFF when the point is normal. For Normally Closed (NC) contacts, the Red LED is OFF when the

point is in alarm, and ON when the point is normal. The Yellow LED is ON only when the point is in Trouble

(open circuit).

Outputs

The NION-2C8M provides two SPDT relay outputs. The relays are rated at 5A @ 30VDC. They can be wired for

normally open or normally closed operation. All rated loads are resistive. Inductive and tungsten loads will be

lower.

NION-2C8M Output Connector

General Configuration

In order to utilize all features available with the NION-2C8M, the 2C8M Scheduling Plug-In utility must be config-

ured at the system workstations. Each Plug-In is described in detail in the Product Installation Description shipped

with each NION. General Plug-In setup information can be found in the appendix of the workstation manual.

NOTE: Input and output lines should

not exceed 2000ft.

Normally Open

Common

Normally Closed

Normally Open

Common

Normally Closed

Output 2

Output 1

NOTE: Jumpers JP4-JP11 should be left in

factory default setting as shown to the left.

Disregard silk screen below output LED.

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