B&C CL 7685 Operator's Manual page 16

B&C Electronics
Connecting a recorder
A current output for a remote recorder or P.I.D. regulators is available on terminals 14-16.
Connect the recorder high (+) to terminal 14
Connect the recorder low (-) to terminal 16
Series connection is required for driving more loads having a total input Resistance lower than 600 Ω.
If the 091.3711 dual output option is installed, a second isolated and programmable output is available
between 15-16 terminals.
Output N°1 and Output N°2 are isolated and selectable 0/20 or 4/20 mA.
Connecting the RTD
The instrument has the automatic Temperature compensation carried out by means of RTD Pt100.
To operate the automatic Temperature compensation, connect the RTD as shown in the "connection"
figure.
A three wire connection is suggested to achieve an accurate compensation over a long distance
between the sensor and the controller.
- connect the terminal of RTD to terminal 23 of the meter;
- connect the common terminal of RTD to terminals 24 - 25 of the meter;
- the 3 wire-cable must not be interrupted on the overall length.
If an extension is needed, the cable must be fastened to the high insulation terminal strip;
- keep the cable away from power wires.
The RTD connection as above described allows the controller to
Temperature.
If the Temperature sensor is not connected or damaged, the unit will operate in manual Temperature
compensation automatically.
- connect the Pt100 to terminals 23 - 24 ;
- install a jumper to terminals 24 - 25.
Checking
Before connecting the system to the power supply:
- check that all cables are properly fastened to prevent strain on the connections
- check that all terminal-strip connections are mechanically and electrically sound
Operator's Manual - Rev. C - 05/05
3-wire connection
2-wire connection
CL 7685
provide a digital readout of
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