Cardax FT Controller 3000 Вказівки щодо встановлення - Сторінка 3

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needs to use a hinged clamp core, (i.e. a split shield), while the power in cable can use either

type.

In the case of the power in (P1) EMI cable shield, the cable must turn through the core twice.

Each extra turn through the core markedly increases the impedance associated with the core

and provides more protection.

Position the EMI cable shield as close to the entry point of the cabinet as possible.

RS485 Communications

Cardax FT Controllers communicate with other Cardax FT units via high quality twisted pair

communications cable with low capacitance - typically Category 5 (CAT5) cable.

The twisted pair cable is polarised and needs to be terminated at the last, physical unit.

RS232 cabling

Communication via modem requires the RS232 cabling to be terminated in a DE9 socket and

connected to plug P3.

Balanced Inputs

Cabling should be a minimum size of 0.2 mm

To ensure correct tamper detection (short or open circuit), the balanced inputs require 4k7

ohm resistors to be connected as close as possible to the device being monitored.

When the monitored device incorporates a normally-closed tamper switch, it can be wired in

series with resistor R1.

Refer to Chapter 2 of the Cardax FT Installation manual for further information on connecting

inputs and resistors.

Output relays

The Cardax FT Controller 3000 has eight relay outputs, (i.e. two per group), PE1 to PE4 and

PF1 to PF4. Refer to the Component Layout within this Installation Note for wiring this plug.

The cabling to and from this relay plug must be capable of carrying sufficient current for the

device the relay is controlling. The relay contact can carry 5 Amps at 24 V DC/AC resistive

load.

Note: The connectors on the Cardax FT Controller 3000 accommodate both horizontal and

Part number 3E1089 R3

March 2003

5 V

Input

4k7

plug

GND

vertical wiring entry.

(24 AWG) for all inputs.

R1 4k7

4k7

Alarm

sensor