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8.1 External Input/Output Connector and Signals
85
8
The EXT I/O connector on the rear of the instrument supports external control by providing output of
the end-of-measurement and comparator decision signals, and accepting input of measurement
trigger and key-lock signals. All signals are isolated by optocouplers (inputs and outputs share a
common signal ground).
Confirm input and output ratings, understand the safety precautions for connecting a control sys-
tem, and use accordingly.
External Control
Chapter 8
Signal input/output
Connect the instrument
’
s EXT I/O
connector to the signal output or
input device.
Make instrument settings
(p. 93)
8.1
External Input/Output Connector
and Signals
To avoid electric shock or damage to the equipment, always observe the following
precautions when connecting to the EXT I/O terminals.
•
Always turn off the power to the instrument and to any devices to be connected
before making connections.
•
During operation, a wire becoming dislocated and contacting another conductive
object can be serious hazard. Make sure that connections are secure and use
screws to secure the external connectors.
•
Ensure that devices and systems to be connected to the EXT I/O terminals are prop-
erly isolated.
To avoid damage to the instrument, observe the following cautions:
• Do not apply voltage or current to the EXT I/O terminals that exceeds their ratings.
• When driving relays, be sure to install diodes to absorb counter-electromotive force.
•
Be careful not to short-circuit
ISO_5V to ISO_COM.
See:
Содержание RM3542
Страница 2: ......
Страница 6: ...Contents iv ...
Страница 16: ...Operating Precautions 10 ...
Страница 26: ...1 3 Screen Organization 20 ...
Страница 32: ...2 3 Turning the Power On and Off 26 ...
Страница 46: ...3 8 Confirming Faulty Measurements 40 ...
Страница 64: ...4 12 Compensating for Thermal EMF Offset Offset Voltage Compensation OVC 58 ...
Страница 84: ...6 4 Auto Exporting Measured Values at End of Measurement Data Output Function 78 ...
Страница 90: ...7 3 Printing 84 ...
Страница 172: ...9 10 Device Compliance Statement 166 ...
Страница 190: ...11 4 Disposing of the Instrument 184 ...
Страница 200: ...Appendix 5 Dimensional Diagram A10 Appendix 5 Dimensional Diagram ...
Страница 214: ...Index Index 4 ...
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