Ravel RE - 104 Spécifications télécharger pdf (Page 13)

Man-1078_Sigma_CP_22

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10B11. Aux 24V DC supply

An auxiliary 24V DC supply is provided to enable local signalling or control of ancillary systems such as door

release controllers.

The terminals for the Aux 24V supply are labelled Aux 24V and ROV. The ROV terminal is the negative

terminal and is the same terminal that should be used to switch the remote control terminals.

It is possible to make the ROV terminal pulsing so that by connecting it to the AL terminal via a remote, volt

free contact, it can be used to pulse the dedicated sounder circuits in response to a signal from another

system for example to give an alert. See programming code 24.

The supply is fitted with an electronic self resetting fuse to protect the control panel’s 24V supply in the

event of a wiring fault.

Any standing load on the Aux 24V supply must be taken into account when calculating battery standby times

as standby time will be significantly affected by even modest standing loads. It is recommended that the

Aux24V output is not used to power standing loads and not used to supply loads of greater than 300

milliamps

Where the Aux 24V supply is used to power electromechanical devices such as relays or door retainers it is

imperative that a suppression diode is fitted across the coil of the electromechanical device to prevent the

generation of high voltage transients back to the control panels power supply.

The Aux 24V DC Supply is not suitable for powering Sigma CP sounder boards, a separate power supply

should be used for these.

11B12. Connection to relay contacts

Volt free changeover relay contacts are provided for local control and signalling if required. These contacts

are rated for switching signalling circuits only and the maximum ratings listed in table 1 on page 5 should

not be exceeded under any circumstances.

Fault relay

The fault relay is normally energised and will de-energise upon any fault condition including total loss of power.

Local fire relay

The local fire relay will energise upon activation of a fire condition on any of the zones or pressing of the

sound alarm button on the front panel. The relay will remain activated until the alarm is silenced or the

panel is reset. This relay will not operate upon activation of the remote AL input or when a fire condition is

triggered on a zone that is in test mode.

Fire relay

The fire relay will energise upon activation of a fire condition on any of the zones. The relay will remain

activated until the control panel is reset. This relay will

NOT

operate upon activation of the remote AL input.

Individual zones can be configured not to operate the Fire relay by setting configuration options E1 to E8.

12B13. Connection to Repeater panels

Repeater panels connect via a 2 core cable to the terminals marked RS485 + and – on the Sigma CP main

control panel PCB. Up to 7 repeaters may be connected and each repeater has terminals for the incoming

cables and outgoing cables. All except the last ancillary board, sounder board or repeater panel connected to

the cable must have the jumper links J2 removed.

Set the repeater address using the DIP switch (SW7); ensure no two repeaters share the same address.

Apply power to main panel first and then all repeater panels. Turn on the Enable Control keyswitch and set

the Write Enable switch to on then briefly press the PROCESSOR RESET button on the main panel. Wait for a

few seconds and the main panel will show the addresses of the repeaters that were found on the display for

instance r1 indicates that a repeater at address 1 has been found.

Turn the write enable switch of, then on again and then press the ENTER button to accept each repeater

that has been found. When all repeaters have been added, set the main panel Write Enable switch to off.

Press the Watchdog reset switch on the main panel.

All repeaters are now configured and the main control panel will report a fault if any repeaters that have

been accepted become faulty or go off line.

For full details of commissioning procedures for repeaters see the Sigma CP Repeater Operation and

maintenance manual.

Please note that repeaters can only be fitted to panels containing boards labeled

S4XXA or above. They will not work with panels containing boards without an alpha

suffix.

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Ravel RE - 104 Spécifications Page 13

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