Emerson FB3000 RTU Instruction Manual
D301851X012
May 2022
22
Installation
2.10
Connecting Communication Ports
DANGER
EXPLOSION HAZARD: Ensure the area in which you perform this operation is non-hazardous.
Performing this operation in a hazardous area could result in an explosion.
The communication ports allow you to connect to a PC or laptop running FBxConnect software or
to other devices.
Table 2-4: COM Terminal Block
Pin
RS-232
4-Wire RS-485
2-Wire RS-485
COM1
1
TXD1
TX1+
TX1+
2
RTS1
TX1–
TX1–
3
RXD1
RX1+
4
CTS1
RX1–
5
GND
GND
GND
COM2
6
TXD2
TX2+
TX2+
7
RTS2
TX2–
TX2–
8
RXD2
RX2+
9
CTS2
RX2–
10
GND
GND
GND
COM3
11
T3+
(Isolated RS-
485 only)
12
T3– (ISO GND)
13
TX/RX+3
14
TX/RX3–
COM4
15
T4+
(Isolated RS-
485 only)
16
T4– (ISO GND)
17
TX/RX4+
18
TX/RX4–
19
20
Use FBxConnect software to choose the port usage (RS-232 or RS-485) for COM1 and COM2.
Note:
Older standards refer to RS-485 (4-wire) as RS-422.
Содержание FB3000
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