Hioki 3511-50, Instruction Manual, Page: 17 / 140

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1.3 Names and Functions of Parts
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1.3.3 Rear View
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1. Power input socket with voltage selector
Connect the supplied power cord here.
2. Power switch
Turns the power for the unit on and off.
3. Optional equipment interface
The optional 9518-01 GP-IB INTERFACE is connected here.
4. EXT I/O connector
For input of an external trigger signal and output of comparator results.
Compatible with sequencer connection.
5. RS-232C connector
Connect the RS-232C cable here.