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6.4.
Dry Contacts
There are 4 dry contact sockets on the Interface Board. The relays can be programmable from
Functions
Settings
menu (under
Bypass active, Output overload, High temperature" alarms can be assigned to the contacts. Each alarm can
be assigned to separate relays but also one alarm may be assigned to all relays.
Each output socket 3-pin and middle pin is fixed, the upper pin is normally closed and lower pin is normally
open.
You may see the relay numbers as above.
Free contact relay connection cables shall have a cross-section of 1.5 mm
Maximum voltage to be applied to the relay contacts is 42VAC rms (sinus) or
60VDC. Maximum contact current depends on the applied voltage and the
load characteristic. Both maximum voltage and maximum contact current
corresponding to the applied voltage shall not be exceeded.
Maximum allowed resistive contact currents for several voltages are given on the table below:
Applied voltage
Up to 42 VAC
Up to 20 VDC
30 VDC
40 VDC
50 VDC
60 VDC
Each relay has both a normally open (NO) and a normally closed (NC) contact. One end of these contacts
is common.
Relay functions are described below:
Relay
Relay 1
Relay 2
Relay 3
Relay 4
Relay functions can be changed through front panel.
menu). "General alarm, Input failure, Battery failure, Output failure,
Maximum contact current for resistive load
16 A
16 A
6 A
2 A
1 A
0.8 A
Table.10
Default Function
General Alarm
Input failure
Battery failure
Output failure
Table.11
KEOR T
.
2
Relay
37
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