FEMA ELECTRÓNICA . Series M . M40-A
17
Protocol
Modbus RTU
Functions
implemented 4 (Read_Input_Registers)
Bus
type
RS-485, up to 57.6 Kbps
Isolation
1000 Vdc
Slots
allowed
‘Opt.1’, ‘Opt.2’, ‘Opt.3’ (see section 1.15)
Protocol
ASCII
Bus
type
RS-485, up to 57.6 Kbps
Isolation
1000 Vdc
Slots
allowed
‘Opt.1’, ‘Opt.2’, ‘Opt.3’ (see section 1.15)
The RTU module provides a Modbus RTU communications module
for M Series of panel meters. The RTU module implements function
‘4’ (‘Read Input Registers’) of the Modbus RTU protocol, to access the
instrument registers (reading value, alarm status, memory of maxi-
mum and minimum, ...)
Configuration from instrument front keypad, through menu entries
‘Opt.1’, ‘Opt.2’ or ‘Opt.3’, depending on the position the module is
installed (see section 1.15).
The RTU module can be ordered pre-installed into a M Series panel
meter, or standalone for delayed installation, as it does not require
soldering or special configuration.
2.3 Module RTU
2.4 Module S4
The S4 module provides a RS-485 communications module for M
Series of panel meters. ASCII protocol with ‘Master’ / ‘Slave’ archi-
tecture. Addressable with up to 31 modules. Frames codified in rep-
resentable ASCII characters (codes 32 to 255), directly visible using
‘hyperterminal’ or similar programs.
• Configurable for direct retransmission to remote meter of M Series
(14 mm and 20 mm digit height) and BDF Series (60 mm and 100 mm
digit height).
• Access to display values, alarm status, memory of maximum and
minimum, alarm setpoints, ...
Configuration from instrument front keypad, through menu entries
‘Opt.1’, ‘Opt.2’ or ‘Opt.3’, depending on the position the module is
installed (see section 1.15).
the S4 module can be ordered pre-installed into a M Series panel
meter, or standalone for delayed installation, as it does not require
soldering or special configuration.
Terminal B
B signal from RS-485 bus
Terminal A
A signal from RS-485 bus
Terminal G
GND
B A G
B A G
B A G
Opt.2
Opt.1
Op
t.3
Power
Signal
Terminal B
B signal from RS-485 bus
Terminal A
A signal from RS-485 bus
Terminal G
GND
B A G
B A G
B A G
Opt.2
Opt.1
Op
t.3
Power
Signal
For more information see document 3498_SERIES-M_MODULE-
RTU_i.PDF
For more information see document 3499_SERIES-M_MODULE-S4_i.
PDF
