Datasheet

After the end of the inhibit delay on starting, "Ti", as soon as the measured speed rises above the threshold value, the output relay changes state, from operating point to rest position ("alarm"
operational state, 11-14 open and 11-12 closed).
It returns to the initial state when the speed falls back below the threshold minus the hysteresis (fixed at 5% of the displayed threshold).
After a power break that has lasted at least 1500 ms, the relay is in the ("normal") operating state during the time delay and stays there until the speed is below the threshold.
On energisation, to allow the controlled process to reach its nominal operating speed, the HSV relay is inhibited for a period that is adjustable from 0.6 to 60 seconds.
This time delay can be modified during inhibition to be shorter or longer.
The HSV relay can also be inhibited by the closing of contact S2: on starting, for example, if the process acceleration time is more than 60 s, or at any time during operation.
Irrespective of the origin (delay on starting or S2 closing), inhibition maintains the output relay in the''closed' position'' ("normal" operational state, contacts 11-14 closed and 11-12 open) and is
signalled by the Inhibit LED lighting up.
If, after removal of the inhibition (end of delay on starting or opening of contact S2), the signal detection phase has not ended, the relay drops out after the expected time between two pulses
(measured from the end of inhibition).
Inhibition must last for as long as required for the product to detect at least 2 periods.
If the signal type has not been determined at the end of the inhibit period, the "inhibit" LED flashes for as long as it is impossible to measure the speed.
Similarly, during operation, it is possible to inhibit the HSV relay at any time by closing S2.
When the HSV has been configured in "memory" mode, if overspeed is detected, the output relay stays in the rest state ("alarm") irrespective of any subsequent change in the speed of the
process. It will not be able to revert to ("normal") operating state until contact S2 closes (50 ms minimum). If, when S2 reopens, the speed is too high, the relay reverts to the rest latched state
("alarm").
The HSV can also be reset by a power break (1500 ms minimum) ; the relay then returns to the ("normal") operating state for at least the duration of the time delay, irrespective of the speed of the
process.
N
o
Legend
1
Voltage (S1)
2
Threshold
3
Inhibit LED
4
Relay
5
Inhibit delay on starting (Ti)
6
1500 ms min.
7
Speed
: HSV - Underspeed with inhibition by S2
N
o
Legend
1
Voltage (S1)
2
Contact S2
3
Threshold
4
Inhibit LED
5
Relay
6
Inhibit delay on starting (Ti)
7
Speed
: HSV - Control of overspeed with latching
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
13/03/2012 www.crouzet.com