HUL and HUH control relays are used for monitoring 1-phase AC/DC voltages. The relay automatically detects the form of voltage that is to be measured. The relay requires a supply voltage. Using a rotary switch, selection can be made between over- or under-voltage, with or without memory. The switch position and consequently the control relay's function mode is detected when the operating voltage is switched on. If the switch is in the wrong position, the relay will remain deactivated and the LEDs will flash to indicate incorrect setting. If the switch position is changed during operation, all LEDs begin to flash but the unit will continue to function normally with the voltage set at the most recent power connection. The LEDs return to normal function when the switch has been returned to its original position, which was set before the first power connection. The limit value for over- or under-voltage is set with a potentiometer that is scaled in the percentage of the voltage range that is to be monitored. The hysteresis value is similarly set with a scale from 5-50 % of the set limit value. The hysteresis value cannot exceed the measurement range's limit value. Both relays are equipped with a time delay (Tt) to ignore temporary voltage deviations. Green LED (Un) indicates supply voltage OK. Yellow LED (R) indicates active relay output.
Without memory
With memory
1: Limit value
1: Limit value
2: Hysteresis
2: Hysteresis
3: Over-voltage
3: Over-voltage
4: Under-voltage
4: Under-voltage
5: Activation of operating voltage
5: Activation of operating voltage
6: Monitored voltage
6: Monitored voltage
7: Time delay (Tt)
7: Time delay (Tt)
Technical data
Supply voltage
24-240 V AC/DC 50/60 Hz ±10 % (wide range input voltage)
Galvanic isolation
Yes, operating voltage measurement
Power consumption
3.5 VA AC/0.6 W DC
Adjustable limit value
10-100 %
Adjustable hysteresis
5-50 %
Time delay (Tt)
0.1–3 s ±10 %
Time delay, start-up
<600 ms (static)
Output relay
Max. breaking current 5 A (2 change-over contacts) Max. breaking voltage 250 V AC
Temperature
-20 °C to +50 °C
Weight
130 g
Approval
, (LVD)73/23/EEC-EMC 89/336/EEC, RoHs.WEEE
Mounting
DIN rail
Measurement range, HUL
E1-M
E2-M
E3-M
Adjustable range
0.2-2 V
1-10 V
6-60 V
Input resistance
6 Ω
30 Ω
180 Ω
Max. continual overload at 25 °C
10 V
30 V
150 V
Measurement range, EUH
E1-M
E2-M
E3-M
Adjustable range
15-150 V
30-300 V
60-600 V
Input resistance
150 Ω
300 Ω
600 Ω
Max. continual overload at 25 °C
250 V
500 V
700 V
Dimensions
Connection
F1: Fast-blow fuse 100 mA (recommendation) NB: When monitoring DC voltage from the same power supply that is connected at A1 or A2, the connection point M must be directly connected to minus (-) in this power supply.
Order number
Order no.
Description
Supply voltage
84872120
HUL voltage control, over-/under-voltage 0.2-60 V AC/DC
24-240 V AC/DC
84872130
HUH voltage control, over-/under-voltage 15-600 V AC/DC
F1: Fast-blow fuse 100 mA (recommendation) NB: When monitoring DC voltage from the same power supply that is connected at A1 or A2, the connection point M must be directly connected to minus (-) in this power supply.
Without memory 1: Limit value 2: Hysteresis 3: Over-voltage 4: Under-voltage 5: Activation of operating voltage 6: Monitored voltage 7: Time delay (Tt)
With memory 1: Limit value 2: Hysteresis 3: Over-voltage 4: Under-voltage 5: Activation of operating voltage 6: Monitored voltage 7: Time delay (Tt)
F1: Fast-blow fuse 100 mA (recommendation) NB: When monitoring DC voltage from the same power supply that is connected at A1 or A2, the connection point M must be directly connected to minus (-) in this power supply.
Without memory 1: Limit value 2: Hysteresis 3: Over-voltage 4: Under-voltage 5: Activation of operating voltage 6: Monitored voltage 7: Time delay (Tt)
With memory 1: Limit value 2: Hysteresis 3: Over-voltage 4: Under-voltage 5: Activation of operating voltage 6: Monitored voltage 7: Time delay (Tt)
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