Connecting Modbus - Siemens SITRANS F Series Operating Instructions Manual

Terminal layout
24 V DC or
110/230 V AC
For configuration of the software parameters, see Input/output configuration (Page 44). More
information can be found in the Function Manual.
HW configuration SW configuration
Power supply
Channel 1 HART Current output HART
Channel 1 MODBUS
Channel 1 PROFIBUS
Channel 2 output Current, Frequency, Pulse and Status
Outputs: Current, Frequency, Pulse and Status
Channel 3 & 4 Input and output
Inputs: Digital
Channel 3 & 4 Relay Status output
Figure 5-9 Termination/configuration overview
Ex and non-Ex versions
● For Ex versions active or passive current output is preselected at ordering and cannot be
changed.
● Non-Ex versions can be connected as either active or passive.
5.5.2

Connecting Modbus

Current output Modbus
1. Open enclosure lid.
2. Remove blind plug and fit cable gland.
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD
5.5 Transmitter power supply, communications and I/Os connection
Ca
Cb
Cc
Cd
Power supply Ch1
1 2 3 4 5
L/+ N/-
Active/+ Active/ -
Passive/+
In
+ (B) - (A)
In
+ (B) - (A)
Terminals
Ch2
6 7 8 9 10
Passive/-
Out
+ (B) - (A)
Out
+ (B) - (A)
Active/+ Active/ -
Passive/+ Passive/-
Connecting
Ch3 Ch4
11 12 13 14 15
Active/+ Active/ - Active/+ Active/ -
Passive/+ Passive/- Passive/+ Passive/-
NO NO NO NO
NC NC NC
16
NC
41