FMI PDS100 - Manual (Page 13)

Page 13 of 18
RS485 Connector Pin, command set and specifications
Figure 8
RS485 Control (Rear Panel)
Figure 9
RS485 Control (Rear Panel)
Pin On DB9
Male
Connector
Signal EIA/TIA-485 name
8 RXD0 A’
4 RXD1 B’
5 TXD1 B
9 TXD0 A
1 Common C/C’
Table 3
RS485 DB9 pin out assignments
PDS-100 follows the guidelines per MODBUS over Serial Line protocol
Port Settings
Baud Rate 19,200
Stop Bits 1
Data Bits 8
Parity Even
Pin On DB9
Male
Connector
Signal EIA/TIA-485 name
5 D1 B | B’
9 D0 A | A'
1 Common C | C’
RS485 DB9 Male
Connector
(2 wire)
(4 wire)
Important: For all industrial environments, it is recommended that an isolation /surge protection adapter
be used to protect the PDS-100 from external high voltages (for example: Aaxeon UTS-401B-SI.)
IN-PDS100-13A
11/1/13 HW