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No. 99MBC071A
6. INTERFACE UNIT
6.1.2 RS-232C Interface
The standard RS-232C interface of this Display Unit allows the LSM to communicate with
external devices via RS-232C (EIA standard) serial signals.
Prior to using this interface , set up the baud rate, data bits, and parity check, etc. according
to Section 4.1, “Basic Setup”. The setting contents must be compatible to that on the external
device to be connected.
6.1.2.1 Specifications
• Applicable plug connector: D-sub 9 pin (Female) (Manufacturer: AMP, HD-20/747951-1)
or equivalent.
6
9
1
5
The pin numbering for this system is shown at the left
• Communication specifications
Device definition
Communication method
Synchronizing method
Baud rate
Data configuration
Specify the LSM as a terminal (DTE)
Full-duplex
Start/stop method (asynchronous)
1200, 2400, 4800, 9600, 19200 bps
Transmission code
Data bits
Start bit
Stop bit
Parity check
Delimiter
ASCII
7 or 8 bits
1 bit
1 bit
None, odd, or even
CR+LF, CR, LF
NOTE 1. The shaded settings are the factory defaults.
2. In the above table “none parity” can not be selected if the data bits are 7 bits in
length. In this case, set the parity to either odd or even, or set the data bits to 8
bits.
TIP 1. DTR and RTS signals from the LSM will be ON immediately after power on.
2. DSR signals to the LSM are always ignored.
3. The transmitter-receiver inside the LSM uses a µPD4723 (Manufacturer: NEC).
