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FEMA ELECTRÓNICA . Series S . S40-T
2.5 Module RTU
The RTU module provides a Modbus RTU communications module
for Series S 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' or 'Opt.2', depending on the position the module is installed.
The RTU module can be ordered pre-installed into a Series S panel
meter, or standalone for delayed installation, as it does not require
soldering or special configuration.
Protocol
Functions implemented
Bus type
Isolation
Slots allowed
Terminal B
Terminal A
Terminal G
Opt.1
B A G
Signal
For more information : http://fema.es/docs/4254_SERIES_M-K-S_
OPTIONS_manual_i.pdf
18
Modbus RTU
4 (Read_Input_Registers)
RS-485, up to 57.6 Kbps
1000 Vdc
'Opt.1', 'Opt.2'
B signal from RS-485 bus
A signal from RS-485 bus
GND
Opt.2
B A G
Power
2.6 Module S4
The S4 module provides a RS-485 communications module for Series
S of panel meters. ASCII protocol with 'Master' / 'Slave' architecture.
Addressable with up to 31 modules. Frames codified in represent-
able ASCII characters (codes 32 to 255), directly visible using 'hyper-
terminal' or similar programs.
• Configurable for direct retransmission to remote meters M60-
485 (14 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' or 'Opt.2', depending on the position the module is installed.
The S4 module can be ordered pre-installed into a Series S panel me-
ter, or standalone for delayed installation, as it does not require sol-
dering or special configuration.
Protocol
ASCII
Bus type
RS-485, up to 57.6 Kbps
Isolation
1000 Vdc
Slots allowed
'Opt.1', 'Opt.2'
Terminal B
Terminal A
Terminal G
Opt.1
B A G
Signal
For more information : http://fema.es/docs/4254_SERIES_M-K-S_
OPTIONS_manual_i.pdf
B signal from RS-485 bus
A signal from RS-485 bus
GND
Opt.2
B A G
Power
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