J+J J4C S20, Handbook

Page: 65 / 91

KIT BSR J4C 20/85
HANDBOOK_
KIT BSR_
65
The BSR safety block system is an automatism that,
when coupled to the J4C multi voltage electric
actuators, lets the valve situate in a preferable
position NC or NO, when there is a power supply
failure. Inside of the housing there are a BSR print
circuit board and a battery pack, which is kept in
continuous charge.
In case of the valve is not in the preferable
position and there is a power supply cut, the BSR
system returns the valve back to the preferable
position by means of the batteries tension, operating
as a “single acting” actuator.
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