Fema B Series, User Manual, Page: 2 / 36

FEMA ELECTRÓNICA . SERIES B . Models Bxx-RTU
2
1. Series B, models Bxx-RTU
Large format industrial meters for Modbus RTU protocol
Large format meters for long distance reading, for industrial
applications. Different formats available with 4 and 6 digits,
with 60 mm and 100 m digit height. Front keypad to access
the configuration menu, and optional remote keypad.
Meters controlled via Modbus RTU protocol. Control of the
reading value, decimal point and alarm status, by writing to
internal registers. Standard Modbus RTU 16 bit registers for
readings from 32767 to -32767, and configurable to 32 bits
registers for readings from 999999 to -199999
(see section
1.21.5).
Alarms can be configured for remote or local control by se -
lecting the ‘Full slave’ or ‘Process slave’ modes
(see section
1.21.2)
. In ‘Full slave’ mode alarms can be controlled by writ -
ing to registers or to coils
(see section 1.21.6).
Bus speed up to 38.400 bps and addresses from 1 to 247.
‘Watchdog’ function to control loss of communication with
the master, with control of error message and alarm activa -
tion
(see section 1.21.4)
.
‘Bus activity’ function for help on communications start-up
(see section 1.21.12).
Output and control options with 1, 2 and 3 relays, transis -
tor outputs, controls for SSR relays, isolated analog outputs,
communications in Modbus RTU, RS-485 ASCII and RS-232.
Sturdy metal housing with full IP65 protection. Internal
connections by plug-in screw clamp terminals, and output
through cable glands. Housing prepared for panel, wall and
hanging mount.
• Configurable ‘ Fast access ’ to selected functions with key
‘UP’ (
5
)
(see section 1.21.11)
• ‘ On power up ’ for system protection on ‘cold’ start-up and
control of alarm status
(see section 1.21.13)
• alarms in ‘Process slave’ mode, with 1 or 2 setpoints, in -
dependent activation and deactivation delays, hysteresis,
manual unlocking, ...
(see section 1.21.8)
Memory of maximum and minimum reading, password pro -
tection, 5 brightness levels.
1.1 How to order
B24 RTU
Model Power
- H -
Option 1
- -
Option 2
-
Option 3*
-R1 (1 relay)
-AO (analog output)
-RTU
(Modbus RTU)
-S4
(RS-485)
-S2
(RS-232)
-T1 (1 transistor)
-SSR (1 control SSR)
-0
(empty)
-H
(85-265 Vac
and 120-370 Vdc)
-L
(11-36 Vdc isolated)
Color
-
-R
(red led)
-G
(green led)
B24 (60 mm, 4 digits)
B26 (60 mm, 6 digits)
B44
(100 mm, 4 digits)
B46
(100 mm, 6 digits)
Others
-
Format
*Option 3 available
with formats B26 and
B46