GE Industrial Solutions ZNET901 User Manual

18R-1000A
10/98

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MONITOR CONTROL

POSITION

NORMAL

EMERGENCY

SOURCE

NORMAL

EMERGENCY

TIME DELAY

BYPASS

TEST

IN PROGRESS

INITIATE

(HOLD UNTIL TRANSFER OCCURS)

AUTOMATIC TRANSFER SWITCH

ANNUNCIATOR

ACTIVE

R

CONTROLS, INC.

12345678

Page

Overview and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

Installation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

ZNET900(A/B) Annunciator

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

ZNET901 Expansion Unit for Annunciation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3

Topology

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4

Singly Terminated Network (Daisy Chain)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4

Doubly Terminated Network (Backbone with Drops)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4

User Settings

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6

Dip Switch Designations

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6

Maintenance and Testing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7

Table of Contents

■■

Zenith Controls, Inc. ZNET900A, ZNET900B and ZNET901 Operation and Maintenance Manual (18R-1000) 1

■■

Overview and Features

KEY SWITCH —

The MONITOR position allows operation of LEDs only. (Key can be removed in this position) The CONTROL
position allows operation of LEDs and the pushbuttons. (Key cannot be removed in this position)

POSITION — Normal LED (Green)

Indicates that the corresponding Transfer Switch load is connected to the Normal source.

POSITION — Emergency LED (Red)

Indicates that the corresponding Transfer Switch load is connected to the Emergency source.

SOURCE — Normal LED (Green)

Indicates that the corresponding Transfer Switch has an acceptable Normal source.

SOURCE — Emergency LED (Red)

Indicates that the corresponding Transfer Switch has an acceptable Emergency source.

TIME DELAY — Active LED (Yellow)

This flashing LED indicates that the corresponding Transfer Switch has a timer functioning. Timers monitored includes
all timers associated with delaying transfer in either direction. Note: Not available in closed transition mode.

TIME DELAY — Bypass Push Button

Will instantaneously lapse T or W timer whichever is timing concurrent with pushbutton activation. (Key Switch
must be in the Control position) Note: Not available in closed transition mode.

TEST — In Progress LED (Yellow)

Indicates the corresponding Transfer Switch is in a test mode. Indication will occur whether the test is initiated
at the annunciator or locally at the ATS.

TEST — Initiate Push Button

Begins a test sequence (power loss simulation) but must be held until transfer occurs. Transfer is complete
once the Emergency Position and Emergency Source LEDs are both illuminated. Releasing before test
is complete will cancel the test. (Key Switch must be in the Control position)

Control
Enables

Pushbuttons

POSITION

SOURCE

TEST

(HOLD UNTIL TRANSFER OCCURS)

NORMAL

EMERGENCY

NORMAL

EMERGENCY

ACTIVE

BYPASS

IN PROGRESS

INITIATE

(Key Removable Only in MONITOR Position)

AUTOMATIC TRANSFER SWITCH

ANNUNCIATOR

Customer Field Designation Label

12345678

R

CONTROLS, INC.

Green LED ..................... Normal Position

Red LED ........................Emergency Position

Green LED ..................... Normal Source

Red LED ........................Emergency Source

Yellow LED ....................Active Time Delay

Black Push Button ........Bypass Time Delay (T or W)

Yellow LED ....................In Progress Test

Black Push Button ........Initiate Test

Key

Switch

Monitor

LEDs Only

MONITOR CONTROL

TIME DELAY