Watts VALPES VRX, Installation And Operation Manual

Page: 34 / 92

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DSBA3401 • Rév. 13/03/2018
34
FAILSAFE: description
FAILSAFE: electric diagram
Failsafe actuators integrate battery pack monitored by electronic board in the actuator. Its function is to relay in case of power
supply failure on terminal PIN 1, 2 and 3 of the actuator. The failsafe actuators can be set on different position like normally
open (NO) or normally close (NC) depends on customer application.
Failsafe option required ON/OFF mode.

The terminal temperature can reach 90°C

The used wires must be rigid (feedback voltages: 4 to 250V AC/DC)

The two functioning modes « pre-set to closed » and « pre-set to open » are two different products (pre-set
in factory) and can’t be interchangeable.

Following a power failure, the Failsafe unit will reset after 3 minutes..
FAILSAFE: warning
II 2 G D Ex d IIB T5 Gb Ex tb IIIC T95°C Db LCIE 06 ATEX 6006X
GS2
Pre-set to closed
Failsafe security unit Control and power supply card
100V-240V 50/60Hz (100V-350V DC)
15V-30V 50/60Hz (24V-48V DC)
On-Off mode
65
66
F+
E-
E- : black wire
F+ : red wire
BATTERY BLOCK
LOAD STATE
FEEDBACK
Loaded battery : closed
contact
D2
D1
18
17
18
17
ACTUATOR WIRING
SUGGESTED CUSTOMER WIRING
N
Open
3 1 2
Ph N
Close
3 1 2
Ph
GS2.O
Pre-set to open