Pressure measuring terminals EM3701
Top view
Status LEDs
Hose connection
Hose connection
Pressure measuring terminals EM3702
Top view
Status LEDs
Hose connection
Hose connection
Pressure measuring terminals EM3712
Top view
Status LEDs
Hose connection
Hose connection

EM37xx | Pressure measuring terminals

The EtherCAT Terminal system is extended with pressure measuring terminals for recording differential and relative pressures. In a similar way to electrical signal acquisition, an EtherCAT Terminal with 24 mm width is used for pressure measurement. The compact design and simple connection system supports space-saving and quick installation. Additional measuring instruments are unnecessary.

The pressure measuring terminals of the EM37xx series are divided into two groups: differential pressure measurement (measurement between two terminals) and relative pressure measurement (measurement relative to the environment). The EtherCAT Terminals can be used for measuring the pressure or as a substitute for a pressure switch. The pressure value in the controller makes it possible to store the switching threshold as a parameter for a logic link. Manual setting at the pressure switch in the application is therefore no longer required.

While the EM3701 measures the pressure difference between two hose connections, the EM3702 and EM3712 enable direct measurement of the pressure value relative to the environment. In contrast to the EM3702, with the EM3712 negative pressure values, as differential values relative to ambient, are also permitted.

The measured values are available as 16-bit values. The status LEDs indicate proper function or errors such as over-range. The pressure measurement terminals are not suitable for the measurement of aggressive gases.

Technical data EM3701 EM3702 EM3712
Technology differential pressure measurement relative pressure measurement relative pressure measurement
Number of inputs 1 2 2
Measuring error 3 % (relative to full scale value)
Measuring range -100…+100 hPa (-100…+100 mbar) 0…7500 hPa (7.5 bar) -1000…+1000 hPa (-1…+1 bar)
Max. overload 500 hPa (500 mbar) differential 10,000 hPa (10 bar) 5000 hPa (5 bar)
Resolution 0.1 hPa (0.1 mbar) per digit 1 hPa (1 mbar) per digit 1 hPa (1 mbar) per digit
Measuring speed 4 ms typ.
Current consumption E-bus typ. 70 mA typ. 60 mA typ. 70 mA
Current consumption power contacts – (no power contacts)
Bit width in the process image 4 byte input/output per channel
Medium non-aggressive gases
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
Approvals CE, UL