OZONE ANALYZER BMT 964 Manual, Rev. 04/2021
50
In the BMT 964 AQ series of sensors, the isolated signal outputs are tied to Protective Ground
by 10 MΩ.
For further description of the functions and properties of the OZONE-IN-WATER SENSOR
BMT 964 AQ refer to the main part of the manual.
Electric connections
Note:
The signal connector pinout of the standard instrument is different to the pinout of the
BMT 964 AQ!
Signal connector:
1
current signal, output
4 - 20 mA high
2
current signal, output
4 - 20 mA low
3
voltage signal, output
0 - 10 V
high
4
voltage signal, output
0 - 10 V
low
5
Auto Zero, input
high (+24 VDC, 18mA)
6
Auto Zero, input
low
7
Error Contact, output
}
open on error
8
Error Contact, output
9
Purge Control, output
for external pump / solenoid valve
10
Output contacts, Common for pins 9, 12, 13, 14, 15
11
Cable Shield
12
Lamp Low, output
open on error
13
Low Limit Alarm, output
opening or closing
(conn. soldering side)
14
High Limit Alarm, output
opening or closing
15
Cuvette Dirty, output
open on error
16
not connected
Mains connector:
1
mains
}
(100 bis 240 VAC, 50/60 Hz, 15 VA)
2
mains
3
(free)
Protective Ground
Alternatively:
DC power connector:
1
positive
}
(12-36 VDC)
2
negative
3
(free)
Protective Ground
RS-232 connector:
1
Cable Shield
2
TxD (from BMT 964 AQ)
3
RxD (to BMT 964 AQ)
(screw terminal
4
Signal Ground
side)
Remote Display:
12-pole connector, only to be connected to BMT Remote Display
Note:
The 24V DC version of the BMT 964 AQ is based on the same type of power connector,
but with the female connector on the SENSOR side.
2
1
3
4
