KROHNE OPTISENS AAC 050 EN - Manual (Page 10)

Manual OPTISENS AAC 050
OPTISENS AAC 050 10
2.1 Connection diagram panel-mounting converter
Connection
Terminals Notes
1 = screen
2 = measuring electrode
1- 4
3 = reference electrode
Metal electrodes &
membrane sensors
without electronics
4 = counter electrode
With 2-electrode sensors bridge 3 + 4
1 + 2 = measurement
3 = - 6V
Membrane Sensor with
electronics 1 - 4
4 = + 6V
Pt100/NTC 5 + 6
Analog output 9 + 10 9 = +, 10 = - , max. burden 500 Ohm
Digital input 11 + 12 11 = +, 12 = - , external controller stop or lack-of-water sensor or
flow-meter
Flow measurement: 11 = white, 12 = brown
Relay 1 18 + 19
Relay 2 20 + 21
Relay 3 22 + 23 Alarm Relay
Power supply 24+25+26 check information given on nameplate
RS485 (option) Sub-D
Sub-D 4/7 3 = +, 8 = -
bridged = terminating impedance activated