Emerson ROC827 User Manual
Page 98
ROC827 Instruction Manual
Issued Mar-06
Communications
5-6
Table 5-3. Built-in LOI EIA-232 Signal Routing
Signal LOI
Function
RJ-45 Pins
on ROC827
Description
DTR
Data Terminal
Ready
3
Originated by the ROC827 Data Terminal Equipment (DTE) to instruct
the Data Communication Equipment (DCE) to setup a connection.
DTE is running and ready to communicate.
GND
Ground
(Common)
4
Reference ground between a DTE and a DCE and has a value 0 Volts
dc.
RX
Receive
5
Data received by the DTE.
TX
Transmit
6
Data sent by the DTE.
RTS
Request to Send
8
Originated by the DTE to initiate transmission by the DCE.
Figure 5-3. RJ-45 Pin Out
The LOI terminal requires the installation of a D-Sub 9 pin (F) to RJ-45
modular converter between the ROC827 and personal computer (PC).
Refer to Table 5-4.
Table 5-4. RJ-45 to EIA-232 (RS-232) Null-modem Cable Signal Routing
EIA-232
(RS-232)
DTE
ROC800-
Series
RJ-45 Pins
on ROC800-
Series
4 – 1
1 – 2
6 DTR
3
5 GND
4
3 TX
5
2 RX
6
7 – 7
8 RTS
8
Table 5-5. Using Cable Warehouse 0378-2 D-Sub to Modular Converter 9-Pin to RJ-45 Black
Pin
Wire
Color
RJ-45 Pins
on ROC800-
Series
1 Blue
4
2 Orange
1
3 Black
6