Xylem HYDROVAR HV 4.150 / 4.185 / 4.220 - Manual (Page 44)

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9.4.5.2 Relay Card
This optional component can be used only in combination
with a HYDROVAR MASTER Inverter.
The Relay Card is connected to the control card using
connection slot X6 (See chapter 9.4.4.1).
Notice:
When using the relay contacts for switching
external contactors, a corresponding RC-snubber-
circuit or varistor is necessary, to prevent
disturbances arising during a switching action of
the relay!
Terminals Relay Card
X10 Relay Card
1 Relay 1
2 Relay 2 [max. 250VAC] [0,25A]
3 Relay 3 [max. 220VDC] [0,25A]
4 Relay 4 [max. 30VDC] [0,25A]
5 Relay 5
X10/
6 COMMON GND
COM
Relay 5
Relay 4
Relay 3
Relay 2
Relay 1
Terminal block
Contacts for switching the fixed speed
pumps.
Please consider that the fixed speed pumps
can’t be switched directly by the Relay card
(an external panel for the contactors of the
D.O.L or STAR/DELTA starters is necessary).