1. SPECIFICATIONS
IMSRM04-E8
5
1.5 Terminal Voltage and Signal Logic
RS-422A and RS-485
Name
Mark state
(Stop bit and signal 1)
Space state
(Start bit and signal 0)
T (A)
Send data
T (B)
Voltage between T (A) and T (B)
−2 V Voltage between T (A) and T (B) +2 V
R (A)
Receive data
R (B)
Voltage between R (A) and R (B)
−2 V Voltage between R (A) and R (B) +2 V
Voltage between T (A) and T (B) is the voltage of T (A) to the T (B) terminal.
Voltage between R (A) and R (B) is the voltage of R (A) to the R (B) terminal.
RS-232C
Signal voltage Logic
+ 3V or more 0 (Space status)
- 3V or less 1 (Mark status)
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