AirTest CN9000 Series Посібник - Сторінка 6

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This custom feature module incorporates a timing circuit, output relays and external input/output wiring

terminal block.

1 – Timing Circuit (Time Select Switch)

If the front panel pushbutton marked "Audible Acknowledge" is pressed the timer circuit silences the

audible horn for a period determined by the "Time Select Switch". After the time period expires the

audible alarm will be enabled and will sound if the system detects a high gas level state.

The Time Select Switch is marked 0 through 9 and A through F (10 through 15) for a total of 16 positions.

Each position represents a 2 minute interval which is multiplied by the switch position value (0 through

15) to determine the audible silence time. If the switch is set to position A (value of 10) the silence time

would be 2 minutes X 10 or 20 minutes The maximum time would be 30 minutes at switch position "F"

(15 X 2 Min. = 30 Min.).

2 – Horn/Strobe Interlock Relays

Separate relays to drive the horn and strobe are provided to facilitate the audible silence function. When

a high gas level is detected relay 3 (marked on module in white) will activate and provide a grounding

(minus) signal to the horn and strobe. If the "Audible Acknowledge" button on the front panel is pressed

relay 2 will disconnect the grounding signal to silence the horn for a period determined by the Time

Selector Switch position.

3 – Input/Output Terminal Block

This terminal block provides connection points for the front panel switches, indicators, horn and strobe.

Refer to diagram below for details.

-12VDC Supply

Fan 1 & 3 & Damper Switch

Distributed By:

(800) 821-4863 TOLL FREE

AirTest Model CN9000 Feature Module

Suuply

Fan 2 Switch

V+

Horn Minus

-12VDC Supply

Suuply

Input/Output Wiring Identification and Simplified Schematic.

GLOBAL CONTROLS, INC.

Note: Symbols for connected devices are for quick reference only.

3008-B 16TH AVE W.

SEATTLE, WA 98119

Refer to schematic diagram for more detail.

(206) 282-4666 TEL

V+

Strobe Minus

Horn Silence Relay Input

V+

+12VDC Supply

Acknowledge (Silence) Button

(206) 282-4888 FAX