Fluke 271-U User Manual - Page 28
Rs232, Gpib Ieee-488
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271 Users Manual RS232 The rear panel carries a 9-pin D-connector compatible with addressable RS232 use. The pin connections are shown below: Pin Name Description 1 - No internal Connection 2 TXD Transmitted data from instrument 3 RXD Received data to instrument 4 - No internal connection 5 GND Signal ground 6 - No internal connection 7 RXD2 Secondary received data 8 TXD2 Secondary transmitted data 9 GND Signal ground Pin 2, 3 and 5 may be used as a conventional RS232 interface with XON/XOFF handshaking. Pins 7, 8 and 9 are additionally used when the instrument is used in addressable RS232 mode. Signal grounds are connected to instrument ground. The RS232 address is set from the front panel using the REMOTE menu. GPIB (IEEE-488) The GPIB interface is an option. It is not isolated; the GPIB signal grounds are connected to the instrument ground. The implemented subsets are: SH1 AH1 T6 TE0 L4 LE0 SR1 RL1 PP1 DC1 DT1 C0 E2 The GPIB address is set from the front panel using the REMOTE menu. 3-4