Yokogawa Standalone MW100 - Manual (Page 103)

App-1
IM MW100-17E
Appendix
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2
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App App
Index
Appendix 1 Serial Interface (Optional) Specifications
The following are the specifications for both types of serial interface (optional) for the
main unit, RS-232 and RS-422A/485.
RS-232 Specifications
Connector Type D-Sub, 9-pin, Plug
Electrical and mechanical spec. Conforms with EIA-574 (EIA-232 (RS-232) standard for
9-pin)
Connection method Point-to-point
Synchronization method Start-stop (asynchronous) system
Baud rate Select from1200, 2400, 4800, 9600, 19200, 38400, 57600,
115200
Start bit 1 bit, fixed
Data length Select either 7 or 8 bits
(When outputting data in binary format, you must use 8 bits.)
Parity
Select Odd, Even, or None
Stop bit Select either 1 or 2 bits
Hardware handshaking For RS and CS signals, select always TRUE, or to use as a
control line.
Software handshaking Select to control send using X-ON and X-OFF signals, or to
use X-ON and X-OFF signals with send/receive signals.
X-ON(ASCII 11H), X-OFF(ASCII 13H)
Receive buffer length 2047 bytes
RS-422A/485 Specifications
Terminal Type Six terminals; clamp, 0.14 to 1.5mm 2 (AWG26 to 16)
Electrical and mechanical spec. Complies with EIA-422A (RS-422A) and EIA-485 (RS-485)
Connection method Multidrop: 4-wire: 1:32
2-wire: 1:31
Communication mode Half-duplex
Synchronization method Start-stop (asynchronous) system
Baud rate Select from 1200, 2400, 4800, 9600, 19200, 38400, 57600,
115200
Start bit 1 bit, fixed
Data length Select either 7 or 8 bits
Parity Select Odd, Even, or None
Stop bit Select either 1 or 2 bits
Receive buffer length 2047 bytes
Electrical characteristics 6 points: FG, SG, SDB, SDA, RDB, RDA
SG, SDB, SDA, RDB, and RDA terminals are functionally
isolated from the internal circuitry of the main unit.
The FG terminal is frame ground.
Communication Distance 1.2 km maximum
Termination Resistance Built-in (with switch) 120 Ω, 1/2 W
Appendix