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The MU-612 analogue input module is designed for applications where multiple analog inputs are required to directly measure unified DC signals and AC signals. The appropriate input range can be selected independently for each input.
Additionally, the modules are equipped with two digital inputs with counters and two digital outputs.

Analog inputs can operate in basic DC mode (input signal is sampled at 1kHz and final value is calculated by the digital filter), or AC mode with numerical calculation of the true effective value (input signal is sampled at 1kHz and effective value is numerically determined from the sequence of samples).

In case of three-phase electric power system, the module allows to determine the phase voltage values and phase-phase voltage values.

The module also includes two digital inputs with counter capability and two digital outputs.

The whole analogue input group is isolated from other circuits of module (DIO ports, power supply and RS-485 interface), but inputs are not isolated from each other. The digital inputs and outputs are isolated from other circuits and from each other.


Type MU-612
Analog inputs 6x U/I
Analog input topology S.E.
Input ranges ±10V in DC mode (i.e. 10V in AC mode)
±5V in DC mode (i.e. 5V in AC mode)
±2V in DC mode (i.e. 2V in AC mode)
±1V in DC mode (i.e. 1V in AC mode)
±0.5V in DC mode (i.e. 0.5V in AC mode)
±0.2V in DC mode (i.e. 0.2V in AC mode)
±25mA in DC mode (i.e. 0÷20mA in AC mode)
ADC resolution 24-bit
(continuous offset and range autocalibration)
Basic accuracy better than 0.1% of FSR
Measurement period less than 0.4s
(the time needed to measure all channels)
Analog input impedance 24kΩ approx. (voltage ranges)
40Ω approx. (current ranges)
±50V continuously (±100V max. 10s)
±60mA continuously (±120mA max. 10s)
Analog input isolation 1kVDC (AIN block against other circuits)
Number of digital inputs 2
Type of digital inputs isolated, bipolar 24V
with 50Hz filter
Digital input signal
(level L)
<3VDC (both polarities)
<3VRMS (signal 50Hz)
Digital input signal
(level H)
10÷35VDC (both polarities)
15÷35VRMS (signal 50Hz)
Overvoltage protection ±60VDC (max. 1s)
60VRMS (signal 50Hz, max. 1s)
Digital input impedance 14kΩ approx.
Digital input isolation 1kVDC (DIN block against other circuits)
100VDC (between DIN channels)
Number of counters 2
Counter frequency 10Hz max.
(signal asymmetry 40/60% max.)
Counter range 0÷4294967295 (i.e. 32-bit counter)
Number of digital outputs 2
Type of digital outputs isolated, 24V
Digital output signal 32VDC/0.3A max.
Digital output isolation 1kVDC (DOUT block against other circuits)
100VDC (between DOUT channels)
Supply voltage 10÷30VDC
Power consumption 2W max.
Housing & Dimensions Modulbox 6M
Signal terminals screw terminals, wire 2.5mm2 max.