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wiring configuration for DB9 to DB9. When the programmable Hipot Tester is set
up with a RS-232 interface, please check the following points:
• Do not connect the output line of one instrument to the output line of another.
• Many devices require a constant high signal on one or more input pins.
• Ensure that the signal ground of the equipment is connected to the signal
ground of the external device.
• Ensure that the chassis ground of the equipment is connected to the chassis
ground of the external device.
• Do not use more than a 45 ft (15m) cable to connect devices to a PC.
• Ensure the same baud rate is used on the device as the one used on PC ter-
minal.
• Ensure the connector for the both side of cable and the internal connected line
are met the demand of the instrument.
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Figure 1 - Pin assignments of the RS-232 connector on the rear panel for DB-9-D
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Figure 2 - Wiring configuration for DB9 to DB
Hipot Electrical Safety Testers Models H111 and H216
1. No connection
2. Receive Data (RxD)
3. Transmit Data (TxD)
4. No connection
5. Signal Ground (GND)
6. No connection
7. No connection
8. No connection
9. No connection
(input)
(output)
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