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1.2 RS-232 Device Cabling
Figures 3 through 5 show the pin assignments required for an RS-232 cable
connection between the ESP RJ-45 ports and your devices.
To ESP RJ-45 Port
Clear to Send
N/C
N/C
Signal Ground
Transmit Data
Receive Data
Data Carrier Detect
N/C
DataTerminal Ready
Request to Send
1
..........
RJ-45 (Plug)
Cable End View
Figure 3. Cable Pin Assignments for ESP RJ-45 to Terminal/Printer
To ESP RJ-45 Port
Clear to Send
N/C
N/C
Signal Ground
Transmit Data
Receive Data
Data Carrier Detect
N/C
Data Terminal Ready
Request to Send
1
..........
RJ-45 (Plug)
Cable End View
Figure 4. Cable Pin Assignments for ESP RJ-45 to PC DB-9
To ESP RJ-45 Port
Clear To Send
N/C
N/C
Signal Ground
Transmit Data
Receive Data
Data Carrier Detect
N/C
Data Terminal Ready
Request to Send
1
..........
RJ-45 (Plug)
Cable End View
Figure 5. Cable Pin Assignments for ESP RJ-45 to Modem DB-25
5
Equinox ESP Multi-Interface Serial Hub Product Installation Guide
Pin #
10
9
8
7
6
5
4
3
2
1
Pin #
10
9
8 8
7
6
5
4
3
2
1
Pin #
10
9
8
7
6
5
4
3
2
1
Pin #
To Terminal / Printer
4
Request to Send
7
3
2
.
Data Terminal Ready
20
Data Carrier Detect
8
6
5
.....
..... ..
....... .
DB-25 (FEMALE)
.
1
...... .....
DB-25 (MALE)
Cable End View
Pin #
7
5
2
3
.
4
Data Terminal Ready
6
1
Data Carrier Detect
8
DB-9 (FEMALE)
Cable End View
Pin #
5
7
2
3
8
20
Data Terminal Ready
4
....... . .
.
1
...... .....
DB-25 (MALE)
Cable End View
Signal Ground
Receive Data
Transmit Data
Data Set Ready
Clear to Send
.
1
o o o o o o o
..
..
o
.....
To PC (DB-9)
Request to Send
Signal Ground
Receive Data
Transmit Data
Data Set Ready
Clear to Send
1
o o o o o
o o o o
To Modem
Clear to Send
Signal Ground
Transmit Data
Receive Data
Data Carrier Detect
Request to Send
.....
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