
Transmitter M400 22
© 02 / 2010 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400
Printed in Switzerland 52 121 378
4.3.3 TB3 – Analog resistive 4-e conductivity sensors
Pin no. Sensor wire color* Function
1 white Cnd inner 1
2 white / blue Cnd outer 1
3 blue Cnd inner 2
4 black Cnd outer 2 / Shield
5 – not used
6 bare shield RTD ret / GND
7 red RTD sense
8 green RTD
9 – +5V
* Transparent not connected.
Terminal 4 and 6 are internally connected, either terminal can be used to connect a wire.
4.3.4 TB3 – Analog inductive conductivity sensors
Pin no.
Sensor wire color
InPro 7250 ST / PFA
Sensor wire color
InPro 7250 HT
Function
1 Coax inner/transparent Coax inner/transparent receive hi
2 red yellow receive lo
3 green/yellow green/yellow shield/GND
4 brown violet send lo
5 blue black send hi
6 white white RTD ret/GND
7 grey grey RTD sense
8 green green RTD
9 – – not used
Terminal 4 and 6 are internally connected, either terminal can be used to connect a wire.
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