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3. Interface Specifications
(1) Transmission system
Serial transmission. Start-stop synchronization.
(2) Transmission
rate
1200/2400/4800/9600 bps
(3) Transmission codes
ASCII codes (8-bit)
(4) Signal level
Compliant with EIA RS-232C.
HIGH Level (Data logic 0)
+5 – +15V
LOW Level (Data logic 1) -5 – -15V
(5) One-character bit configuration
Start bit
1 bit
Data
bit
8
bits
Parity
bit
0/1
bit
Stop
bit
2
bits
(6) Parity
bit
None/Odd/Even
LSB
MSB
(1) (2)
(3) (4)
(5) (6)
(7)
(8)
(9)
(10)
(11)
(12)
Logic “1”
Logic “0”
Start bit
Parity bit
(May be omitted)
Stop
bits
Data bits