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10. SERIAL INTERFACE
RS-232C Serial Interface
Transmission system EIA RS-232C
Transmission form
Asynchronous, bi-directional, half duplex
Data format
Baud rate
2400 bps
Data bits
7 bits
Parity EVEN
Stop bit
1 bit
Code ASCII
Terminator
CR LF (CR: 0Dh, LF: 0Ah)
Bit format
Pin Connections
SV-10/SV-100 (DCE)
Computer (DTE)
Pin No.
Signal Name *1
Description
Direction
Signal Name
1 FG Frame
ground -
FG
2 RXD Receive
data
←
TXD
3 TXD Transmit
data
→
RXD
4
RTS
Ready to send *2
←
RTS
5
CTS
Clear to send *2
→
CTS
6
DSR
Data set ready
→
DSR
7 SG Signal
ground -
SG
16, 18, 19, 21, 23
Internal use
Do not connect *3
Others Not
used
*1: Signal names of the viscometer side are the same as the DTE side with TXD and RXD
reversed.
*2: RTS and CTS flow control are not used. CTS output is HI always.
*3: Normal DOS/V cables do not use these terminals.
RS-232C
-5 V to -15 V
+5 V to +15 V
Data bits
Start bit
Parity bit
Stop bit