VEGA VEGAPULS 56K - Manual (Page 30)

30 VEGAPULS 56K
22915-EN-041227
4
- +
4 ... 20 mA
2
2
2
Measuring system with VEGAPULS 56K Ex, 56K Ex0 via separator (Smart-
Transmitter) on passive PLC
• Two-wire technology (loop powered), intrinsically safe ia supply via the signal cable of the
separator for operation of the sensor in Ex zone 1 (VEGAPULS 56K Ex) or in zone 0
(VEGAPULS 56K Ex0)
• Output signal sensor, 4 … 20 mA passive.
• Output signal separator, 4 … 20 mA active
• Optional external indicating instrument with analogue and digital display (can be mounted
up to 25 m away from the sensor).
• Adjustment with PC, HART ® handheld or adjustment module MINICOM (can be plugged into
the sensor or into the external indicating instrument VEGADIS 50)
• Max. resistance of the signal cable 15
Ω per wire
Electrical connection
active 1)
VEGA-
CONNECT 2
Separator
(see „3.3 Approvals“)
VEGADIS 50 Ex
PLC
HART ® handheld
Ex area Non Ex area
EEx ia
1) 4 … 20 mA active means that the
separator delivers a level-
dependent current of 4 … 20 mA
The separator reacts electrically
to the PLC like a current source.