Svantek SVAN 977A - Page 252

252
SVAN 977A User Manual - Appendixes
Serial port
SVAN 977A Serial Port provides data transfer using RS232 data format but in TTL logic standard
Serial Port socket (external view)
Table C.5.5. Pin-out of the Serial Port (USB-Host connector)
Pin number
USB
1
Vbus
2
TxD
3
RxD
4
GND
Shield
Ground
RS 232 interface (optional)
The RS 232 interface option for SVAN 977A is provided by means of the SV 55 interface. It conforms to the
EIA Standard RS 232C. It enables the user to program remotely all instrument functions and the transmissions
to and from the meter with the speed from 1200 bit/s to 115200 bit/s.
The SV 55 must be connected to the SVAN 977A Serial Port
The SV 55 - DB 09 F - pin female connector pin-out is given below.
Table C.5.6. SV 55 interface description
PC RS 232,
9 - pin connector
Signal name
SV 55 connector
(DB 09 F)
Pin number
1 – LSD
1 (not connected)
2 – RXD
3
3 – TXD
2
4 – DTR
6 connected to pin 4
5 – GND
5
6 – DSR
4 connected to pin 6
7 – RTS
8
8 – CTS
7
9 – GND
9 (not connected)