1SVR740750R0400 Datasheet, PDF (11/18 Pages) List of Unclassifed Manufacturers – Voltage monitoring relay CM-EFS.2 For single-phase AC/DC voltages

Voltage window monitoring 2x1 c/o (SPDT) contact i OFF-delayed B with latching f
Open-circuit principle h
The voltage to be monitored (measured value) is applied to terminals B-C. The control supply voltage applied to terminals
A1-A2 is displayed by the glowing green LED.
If the measured value exceeds the threshold value_max (>U) or drops below the threshold value_min (<U), the output relay 11₁₅-
12₁₆/14₁₈ (>U), or 21₂₅-22₂₆/24₂₈ (<U) respectively, energizes, the yellow LED (relays energized) flashes Z and the red
LED glows (overvoltage), or flashes W (undervoltage) respectively.
If the measured value decreases below the threshold value_max minus the fixed hysteresis (5 %) or exceeds the threshold
value_min plus the fixed hysteresis (5 %), the red LED turns off. The output relay 11₁₅-12₁₆/14₁₈ (>U), or 21₂₅-22₂₆/24₂₈ (<U)
respectively, remains energized (latching function).
If control supply voltage is interrupted (reset), the output relays de-energize and the yellow and green LEDs turn off.
Closed-circuit principle g
The voltage to be monitored (measured value) is applied to terminals B-C. When control supply voltage is applied to
terminals A1-A2, the output relays energize and the green and yellow LED (relays energized) glow.
If the measured value exceeds the threshold value_max (>U) or drops below the threshold value_min (<U), the output relay 11₁₅-
12₁₆/14₁₈ (>U), or 21₂₅-22₂₆/24₂₈ (<U) respectively, de-energizes, the yellow LED (relays energized) flashes Y and the
red LED glows (overvoltage), or flashes W (undervoltage) respectively.
If the measured value decreases below the threshold value_max minus the fixed hysteresis (5 %) or exceeds the threshold
value_min plus the fixed hysteresis (5 %), the red LED turns off. The output relay 11₁₅-12₁₆/14₁₈ (>U), or 21₂₅-22₂₆/24₂₈ (<U)
respectively, remains de-energized (latching function).
If control supply voltage is interrupted (reset), the yellow and green LEDs turn off. The output relays energize again when
control supply voltage is re-applied.
A1-A2
Threshold_max
Hysteresis
Measured value
Hysteresis
Threshold_min
Open-circuit principle open
>U: ^{11-14 (15-18)}
11-12 (15-16)
<U: ^{21-24 (25-28)}
21-22 (25-26)
green LED
red LED
yellow LED
Closed-circuit principle ^closed
>U: ^{11-14 (15-18)}
11-12 (15-16)
<U: ^{21-24 (25-28)}
21-22 (25-26)
green LED
red LED
yellow LED
Reset
Data sheet | Voltage monitoring relay CM-EFS.2 - 11