Emerson DL8000 - Connection; Local Operator Interface (LOI - Local Port)

DL8000 Preset Instruction Manual
Revised February-2016 Modules 3-35
3.3.2 Local Operator Interface (LOI – Local Port)
The Local Operator Interface (LOI) port provides direct
communications between the DL8000 and the serial port of an operator
interface device, such as a personal computer (PC). The interface
allows you to access the DL8000 with a direct connection using
ROCLINK 800 software for configuration and transfer of stored data.
The LOI uses the Local Port in ROCLINK 800 software.
The LOI terminal (RJ-45) on the CPU (see Figure 3-38) provides wiring
access to a built-in EIA-232 (RS-232) serial interface, which is capable
of 57.6K baud operation. The RJ-45 connector pin uses the data
terminal equipment (DTE) in the IEEE standard.
The LOI port supports ROC Plus and Modbus protocol
communications. The LOI also supports the log-on security feature of
the DL8000 if you enable the Security on LOI feature in ROCLINK 800
software.
Table 3-9 shows the signal routing of the CPU connections. Figure 3-39
shows the RJ-45 pin out.
Table 3-9. Built-in LOI EIA-232 Signal Routing
Signal LOI Function
RJ-45 Pins
on DL8000
Description
DTR
Data Terminal
Ready
3
Originated by the DL8000 Data Terminal Equipment (DTE) to
instruct the Data Communication Equipment (DCE) to set up 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 3-39. RJ-45 Pin Out
The LOI terminal requires a D-Sub 9 pin (F) to RJ-45 modular
converter installed between the DL8000 and a personal computer (PC).
See Table 3-10.