Accusafe Sensor Module User Manual
4
06/21/2021
IMPORTANT:
•
MAKE SURE POWER CABLE AND MODBUS CABLE ARE
SECURED
BEFORE POWERING
UP DEVICE
The F901Controller module supports the standard Modbus protocol in both RTU and TCP/IP mode
depending on how the associated sensor module(s) is/are configured and how the controller is
physically interfaced with the sensor(s). See section 3.2 of the F901B Sensor Module user manual
for details on sensor Modbus setup and implementation.
3.2.1 RTU RS485 CONFIGURATION
RS485 cabling configuration is shown in the diagrams and table 3-1 below.
Pin
Name
Type
Description
1
3NC
No Connection
2
GND
Reference potential
Local device ground
3
NC
No Connection
4
B (D-)
Bus In/Out
Driver output and receiver input
5
A (D+)
Bus In/Out
Driver output and receiver input
6
NC
No Connection
7
NC
No Connection
8
NC
No Connection
TABLE 2-1
2.3 MODBUS OPERATION
