
Transmitter M400 24
© 02 / 2010 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400
Printed in Switzerland 52 121 378
4.3.7 TB3 – Analog oxygen sensors
These sensors use 52 300 1XX series VP cables.
Pin no. Sensor wire color Function
1* – not used
2 Coax Shield / red Anode
3* – not used
4* green / yellow Shield / GND
5 Coax Inner / transparent Cathode
6 white, grey Temperature, Guard
7 – not used
8 green Temperature
9 – +5 V
Blue wire not used.
Terminal 4 and 6 are internally connected, either terminal can be used to connect a wire.
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NOTE: * Install jumper (supplied) 1 to 3 to 4 when using InPro 6900 (ppb measurement).
4.3.8 TB3 – Analog dissolved carbon dioxide sensors
Dissolved carbon dioxide sensors use 52 300 1XX series VP cables.
Pin no. Sensor wire color Function
1 Coax inner / transparent Glass
2 – not used
3 Coax shield / red Reference
4 green / yellow GND / Shield
5 – not used
6 white RTD ret / GND
7 – not used
8 green RTD
9 – +5 V
grey (no connection)
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NOTE: Jumper 3 to 4 has to be installed
Terminal 4 and 6 are internally connected, either terminal can be used to connect a wire.
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