Enmet PROAIR 2200 Manual do Utilizador descarregar pdf (Página 10)

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ENMET Corporation

3.4.1 Relay Contacts

Relay contacts are available for each alarm; these are

SPDT

, rated at 10Amp at 110

, and may be latching or non-latching

as required by the application.

They are accessed on the terminals next to each relay see

Figure 2 & 2A

. The contact positions are noted on the circuit board

next to each terminal.

Relays may also be configured as failsafe or non-failsafe. The default alarm relay configuration is for latching mode, and

failsafe. They may be reconfigured in the maintenance menu.

See section 5.3.5 & 5.3.6

The PC Board is labeled for the relays in their un-energized state. If the relay is configured for failsafe, then this is also the alarm

condition state. Non-failsafe configured relays in the alarm state, are the reverse of the PC board labeling. Note that the

Fault(FLT) relay cannot be set to operate in a Non-Failsafe mode. Please see the

Table 1

below:

Table 1 : Relay Failsafe Settings

Position

Failsafe

Alarm

Non

Failsafe

Alarm

J5 Relay 1 - NO Normally Open Normally Closed

J5 Relay 1 - COM Common Common

J5 Relay 1 - NC Normally Closed Normally Open

J6 Relay 2 - NO Normally Open Normally Closed

J6 Relay 2 - COM Common Common

J6 Relay 2 - NC Normally Closed Normally Open

J8 Relay 3 - NO Normally Open Normally Closed

J8 Relay 3 - COM Common Common

J8 Relay 3 - NC Normally Closed Normally Open

J10 Relay 4 - NO Normally Open Normally Closed

J10 Relay 4 - COM Common Common

J10 Relay 4 - NC Normally Closed Normally Open

J14 Relay 5 - NO Normally Open Normally Closed

J14 Relay 5 - COM Common Common

J14 Relay 5 - NC Normally Closed Normally Open

J15 Relay 6/FLT - NO Normally Open N/A

J15 Relay 6/FLT - COM

Common N/A

J15 Relay 6/FLT - NC Normally Closed N/A

Relays can be linked to specific alarms. The table below shows the default relay links. They may be changed in the

maintenance menu if required. See

Section 5.0

Channel 1

Channel 2

Channel 3

Channel 4

Relay 1 Low Alarm

Relay 2 Low Alarm

Relay 3 Low Alarm

Relay 4 Low Alarm

Relay 5 High Alarm High Alarm High Alarm High Alarm

In addition, there is a fault relay, which changes state whenever the instrument is in a fault condition. The contact positions are

noted on the circuit board next to each terminal.

See Figure 2A.

The coil of this relay is energized when the instrument is in

the non-fault state; the contact conditions given on the circuit board next to the terminal, are for the non-energized state, which

is identical to the fault state.

These relay contacts can be used to operate auxiliary alarms or other functions. It is recommended that power for auxiliary

equipment be supplied from an independent power source, separate from the

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. Place a hole in the enclosure for a

wire exit, and use appropriate cable fittings. Be sure to note the location and depth of hardware inside the enclosure.

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