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1.3 Rear Panel Connectors
CN1: COM Port1 (D89)
Mode
001
RS-232
Pin Define
(3T/5R)
1
COM1C_DCD
2
COM1C_RXD
3
COM1C_TXD
4
COM1C_DTR
5
GND
6
COM1C_DSR
7
COM1C_RTS
8
COM1C_CTS
9
COM1C_RI
10
NC
BIELK-IHT User's Manual
000
010
RS-422
RS-485
(1T/1R Full
(1T/1R TX Enable
Duplex)
Low Active)
TX(B)
(R(B) / T(B))
TX(A)
(R(A) / T(A))
RX(A)
NC
RX(B)
NC
GND
GND
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Chapter 1: Introduction | 5
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