ENMET MEDAIR 2200 - Manual (Page 10)

M ED A IR 2200 ENMET Corporation
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3.4.1 Relay Contacts
Relay contacts are available for each alarm; these are SPDT , rated at 10Amp at 110 V AC , 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 form an independent power source, separate for the
M ED A IR 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.