:: Products

MU-138, MU-139

The MU-138 and MU-139 modules are especially designed for applications where a programmable SSI receiver is required, i.e. for non-invasive monitoring data transmissions between SSI master and SSI slave.

SSI slave controller supports transfers with CLK frequency in range from 100kHz to 2MHz and allows to configure datalength up to 32 bits with straight binary or Gray code. Data captured on SSI interface can be read by Modbus RTU command via RS-485.

Signal isolation is solved in accordance with minimal effect on SSI transmissions, both signals SSI DATA and SSI CLK are therefore isolated by optocouplers with high sensitivity.

Additionally, the MU-139 module is equipped with real-time clock circuit (abbreviation RTC) allowing e.g. to back up the power supply failure time. RTC circuit requires a battery and MU-139 can not be supplied for extended temperature range.


Type MU-138 MU-139
Number of SSI interfaces 1
SSI DATA signal isolation 1kVDC
SSI CLK signal isolation 1kVDC
SSI CLK frequency 100kHz÷2MHz
Data length 1÷32-bit
Data coding straight binary or Gray code
Real-time clock (RTC) - - - yes
Supply voltage 10÷30VDC
Power consumption 1.6W max.
Housing & Dimensions Modulbox 3M
Signal terminals screw terminals, wire 2.5mm2 max.