Rs485 Modbus; Bidirectional Serial Pulse (V1 Protocol); Hart Protocol - Endress+Hauser Proservo NMS 5 series Technical Information

RS485 Modbus

Bidirectional serial pulse
(V1 protocol)

HART Protocol

Endress+Hauser
Module name
No. of unit
Baud rate
Parity
Cable
Topology
Transmission distance
Instrument address
Isolation
Module name
No. of units
Baud rate
Cable
Topology
Transmission distance
Instrument address
Isolation
Module name
No. of units
Baud rate
Cable
Transmission distance
Instrument address
Isolation
Commdule RS 485 communication module (~2008),
COM - 5 (2009~)
Maximum 10 instruments per loop
600/1,200/ 2,400/ 4,800/ 9,600/ 19,200 bit/s, selectable
Odd, Even, None, selectable
Two wire twisted cable with screening (DGND is connected to the
ground cable)
Serial bus, electrically isolated, tree structure
Maximum 1,200 m including limbs or branches (negligible with
branches under 3 m)
Accessed via touch control
Bus inputs are electrically isolated from the other electronics
COM - 1
Maximum 10 instruments per loop
3,300 BPS
Two wire (twisted pair) unscreened cable
Serial bus, tree structure
Maximum 6,000 m
Accessed via touch control
Serial communication circuit isolated from other circuits
Commdule HART (2009), COM - 6 (2009~)
Maximum 15 instruments per loop
1,200 BPS
Two wire, twisted pair screened cable Minimum core φ 0.15
(24AWG)
Maximum 1,200 m
Accessed via touch control
Bus input are electrically isolated from the other electronics
Proservo
9