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
