KROHNE OPTISENS PAC 050 EN - Manual (Page 11)

Manual OPTISENS PAC 050
11 OPTISENS PAC 050
2.2 Connection diagram wall-mounting enclosure
Connection Terminals
Notes
1 = reference electrode = screen
pH electrode 1 - 2
2 = measuring electrode = core
1 = measuring electrode = core ORP electrode 1 - 2
2 = reference electrode = screen
Measurement = brown & white
1 = brown, 2 = white
Supplied voltage, yellow & green Impedance converter 1 - 4
3 = yellow = -6V, 4 = green = +6V
Pt 100 6 - 7
Display contrast Display Potentiometer to adjust the display contrast
Analog output 11 + 12 11 = +, 12 = - max. burden 500 Ohm
Relay 1 14 + 15
Relay 2 16 + 17
Relay 3 18 + 19 Alarm relay
Power supply 20+21+22 check information given on instrument label
RS 485 (option) 23 + 24 23 = 1, 24 = +
Digital input 26 + 27 26 = +, 27 = -, external controller stop or lack-of water indication