Proservo
Hauser
9
RS485 Modbus
Bidirectional serial pulse
(V1 protocol)
HART Protocol
Module name
Commdule RS 485 communication module (~2008),
COM - 5 (2009~)
No. of unit
Maximum 10 instruments per loop
Baud rate
600/1,200/ 2,400/ 4,800/ 9,600/ 19,200 bit/s, selectable
Parity
Odd, Even, None, selectable
Cable
Two wire twisted cable with screening (DGND is connected to the
ground cable)
Topology
Serial bus, electrically isolated, tree structure
Transmission distance
Maximum 1,200 m including limbs or branches (negligible with
branches under 3 m)
Instrument address
Accessed via touch control
Isolation
Bus inputs are electrically isolated from the other electronics
Module name
COM - 1
No. of units
Maximum 10 instruments per loop
Baud rate
3,300 BPS
Cable
Two wire (twisted pair) unscreened cable
Topology
Serial bus, tree structure
Transmission distance
Maximum 6,000 m
Instrument address
Accessed via touch control
Isolation
Serial communication circuit isolated from other circuits
Module name
Commdule HART (2009), COM - 6 (2009~)
No. of units
Maximum 15 instruments per loop
Baud rate
1,200 BPS
Cable
Two wire, twisted pair screened cable Minimum core
φ
0.15
(24AWG)
Transmission distance
Maximum 1,200 m
Instrument address
Accessed via touch control
Isolation
Bus input are electrically isolated from the other electronics
