2 - serial ports (ch1 to ch8) – Axel AX4020 Installation Guide User Manual
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Connector Pin Assignments
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Installation Guide - AX4020 Office Server
9
4.1.2 - AX4020 Connected to an Ethernet Controller
IMPORTANT: the cable is composed of two twisted pairs. The two wires
TX+ / TX- must belong to one pair and the two wires RX+ / RX- must
belong to the other pair.
4.2 - SERIAL PORTS (CH1 TO CH8)
The 4 serial ports are bi-directional ports (for printers, bar-code readers, touch
screens, etc.):
Chx connector (AX4020 rear panel)
Pin
Signal Name
Direction
1
RTS (Request To Send)
Output
2
DTR (Data Terminal Ready)
Output
3
RD (Received Data)
Input
4
SG (Signal Ground)
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5
CTS (Clear To Send)
Input
6
TD (Transmitted Data)
Output
7
DSR (Data Set Ready)
Input
8
DCD (Data Carrier Detect)
Input