Plug Connection (Optional); Parallel Connection Of Several Transducers - Hbk Hbm Rtn Montageanleitung

5.2

Plug connection (optional)

2
3
4
Fig. 5.2 Connector pin assignment
With this connector pin assignment, the output voltage at the measuring amplifier is posi­
tive when the transducer is loaded. The plug is implemented in a 6-wire configuration.
When transducers in a 6-wire configuration are connected to amplifiers in a 4-wire config­
uration, the sense leads of the transducers must be connected to the corresponding exci­
tation voltage leads: Marking (+) with (+) and marking (-) with (-), see Fig. 5.2. This mea­
sure also reduces the cable resistance of the excitation voltage leads.
However, there will be a voltage loss on the supply leads due to the cable resistance that
is still present and not compensated for by the 6-wire configuration. A large part of this
loss can be eliminated by a calibration, however, the temperature-dependent part re­
mains. The pin assignment for the cables available as accessories can be found in data
sheet B03643.
5.3

Parallel connection of several transducers

Only load cells with an aligned output (nominal (rated) sensitivity and output resistance)
are suitable for parallel connection. Wire load cells in parallel by joining together the ca­
ble terminations of the same color.
Important
In this case, if an individual load cell is overloaded, this will not be apparent from the out­
put signal.
RTN
ELECTRICAL CONNECTION
8
5
Plug-in contact 1 = measurement signal (-)
Plug-in contact 2 = not in use
1
Plug-in contact 3 = sense lead (-)
7
Plug-in contact 4 = not in use
Plug-in contact 5 = sense lead (+)
Plug-in contact 6 = excitation voltage (+)
6
Plug-in contact 7 = excitation voltage (-)
Plug-in contact 8 = measurement signal (+)
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