Beckhoff EL47 Series, Documentation

Page: 131 / 178

Commissioning
EL47xx 131 Version: 2.7
Fig. 165: Connection of externally supplied sensors
Classification of the Beckhoff terminals/ boxes - Beckhoff 0/4-20 mA terminals/ boxes (and related product
groups) are available as
differential and single-ended terminals/ boxes (and related product groups):
Single-ended
EL3x4x: 0-20 mA, EL3x5x: 4-20 mA; KL and related product
groups exactly the same
Differential
EL3x1x: 0-20 mA, EL3x2x: 4-20 mA; KL and related product
groups exactly the same
Preferred current direction because of internal diode Preferred current direction because of internal diode
Designed for the connection of externally-supplied sensors with a
3/4-wire connection The terminal/ box is a passive differential current measuring de-
vice; passive means that the sensor is not supplied with power.
Designed for the connection of self-supplied sensors with a 2-wire
connection