Analog input EM3701 Measurement technology | Pressure measurement EtherCAT Terminal 168 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 (relative pressure measurement). 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 Technology 1-channel differential pressure measuring terminal -100…+100 hPa EM3701 differential pressure measurement The EM3701 pressure measuring terminal enables direct measurement of pressure differences between two hose connections. The pressure difference is available as a 16 bit value and can be measured between any points up to an ambient pressure of 10 bar. The status LEDs indicate proper function or errors such as over-range. Measuring error 3 % (relative to full scale value) Measuring range -100…+100 hPa (-100…+100 mbar) Current consumption – (no power contacts) power contacts Max. overload 500 hPa (500 mbar) differential Medium non-aggressive gases Operating temperature 0…+55 °C Approvals CE, UL Weight approx. 95 g Further information www.beckhoff.com/EM3701 We reserve the right to make technical changes.
EM3702, EM3712 Analog input 2-channel relative pressure measuring terminal 7500 hPa EM3702 relative pressure measurement 2-channel relative pressure measuring terminal -1000…+1000 hPa EM3712 EtherCAT Terminal 169 The EM3702 pressure measuring terminal enables direct measurement of two pressure values at the hose connections. The pressure is determined as a pressure difference to the ambiance of the EM3702 and is available as a 16 bit value. The status LEDs indicate proper function or errors such as over-range. The EM3712 pressure measuring terminal enables direct measurement of two negative pressure values at the hose connections. The pressure is determined as a pressure difference to the ambiance of the KM3712 and is available as a 16 bit value. The status LEDs indicate proper function or errors such as over-range. 3 % (relative to full scale value) 3 % (relative to full scale value) 0…7500 hPa (7.5 bar) -1000…+1000 hPa (-1…+1 bar) – (no power contacts) – (no power contacts) 10,000 hPa (10 bar) 5000 hPa (5 bar) non-aggressive gases non-aggressive gases 0…+55 °C 0…+55 °C CE, UL CE, UL approx. 95 g approx. 95 g www.beckhoff.com/EM3702 www.beckhoff.com/EM3712 We reserve the right to make technical changes.