Advanced ExGo Series Посібник - Сторінка 15

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3.4 Wiring Installation

The unit is designed for easy wiring installation.

"Plug-in" terminal blocks are provided for all

connections to the unit.

NB: Minimum / Maximum cable size for terminal

block connections is limited to 0.35mm² -

2.5mm² (22-14AWG).

All electrical wiring installation work

should be carried out in accordance with

the code of practice applicable in the

country of installation.

3.4.1.1 24V DC Power

A 24V DC power supply is required.

Note: The DC power supply used MUST BE

designated a Safety Extra Low Voltage (SELV)

supply.

Connect the 24V DC supply feed input to the

SUPPLY +24V and 0V terminals on the

interface card.

Use cables of sufficient size to ensure that the

power input voltage is maintained under all

supply conditions – refer to specifications

section.

A secure ground connection is required. Although no system is immune to the effects of

lightning strikes, a secure ground connection will reduce susceptibility.

Run an earth cable (or use the drain wire of the DC Power lead) between the unit and

Must be

the control panel. Fixing points are provided in the back of the enclosures to terminate

earthed

the earth.

3.4.1.2 Relay Outputs

If additional relays are required, then install the

Exp-007 2-Way Relay card in the rear of the

enclosure.

Mounting pillars are provided. Affix the card with

the supplied M3 fixing screws.

Connect the 4-Way ribbon cable between the

relay card and the main chassis card (PL3) –

the connectors are polarised to prevent incorrect

connection.

Two changeover volt-free relay outputs are

provided. Each is rated at 30V AC/DC, 1A,

resistive.

Both Relay outputs are programmable (refer to

Extinguishing Control Panel manuals).

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To maintain electrical integrity of the SELV wiring on the

DC Power and Communications lines all SELV wiring

should be segregated from LV mains wiring and be wired

using cable with insulation suitable for the application.

To minimise the effects of EMC interference all data wiring

circuits should be wired with a twisted pair of conductors

with a cross sectional area suitable for the loading

conditions.

E X T I N G U I S H A N T

In areas where cabling may come into contact with high

R E L E A S E

frequency interference, such as portable radio transceivers

I M M I N E N T

etc. the data wiring cable should be of a twisted pair

construction within a overall screen. Care should be taken

to correctly terminate this screen, refer to the information

T I M E R H E L D

below.

D I S A B L E D

M O D E

M A N U A L O N L Y

S U P P L Y

C O N T R A S T

A D J U S T

OBSERVE POLARITY OF CONNECTIONS

RELAY

COM NC

NO COM NC

R E L E A S E D

A B O R T E D

F A U L T

A U T O +

M A N U A L

4 8 5 - I N

I N P U T S

F I R E

Z O N E - 1

Z O N E - 2

Z O N E - 3

S Y S T E M F

4 8 5 - O U T