ENMET MX-52 - Manual (Page 18)

ENMET Corporation MX52 C ONTROL
14
T = Time of 5 seconds or alarm 3 time delay
Relay engaged
Buzzer engaged
START
Threshold exceeded
No Yes Alarm LED illumi-
nated in steady mode
Time T exceeded
Yes No
Alarm LED
extinguished
END
LED extinguished
Relay disengaged
Block Diagram 2: Normal Cycle with Automatic Clearing
Alarm 3 operates in the same way as the normal cycle.
The times defined for alarms 1 and 2 (time delays) are, in this case, used to define the minimum operating time for
each relay.
t AL1 tR1 R2 t AL2
Threshold AL2
Threshold AL1
Starting of
relay R1
Stopping of
relay R1
Starting of
relay R2
Stopping of
relay R2
min.
t
AL1
Min. operating time for alarm 1
(defined for each channel) t
1
t
AL2
Min. operating time for alarm 2
(defined for each channel) t
2
t
R1 R2
Switching time from relay 1 to relay 2
(defined for the whole unit) t
R1 & R2
Block Diagram 3: Parking Cycle
Illumination of
flashing alarm LED
After T2 time