Enmet MEDAIR 2200 User Manual download pdf (Page 10)

2200 ENMET Corporation

3.4.1 Relay Contacts

Relay contacts are available for each alarm; these are SPDT, rated at 10Amp at 110V

, 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

Fai

lsafe

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

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 form an independent power source, separate for the M

2200. 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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Enmet MEDAIR 2200 User Manual Page 10

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