Fema Electronica K Series, Руководство пользователя, Страница: 4 / 32

FEMA ELECTRÓNICA . Series K . K40-232
4
Button ‘LE’
Earth connection - Although a
terminal is provided for earth
connection, this connection is
optional. The instrument does
not need earth connection for
correct operation nor for com -
pliance with the security regu-
lations.
~
~
+
-
8 9 0
Fuse - To comply with security regulation 61010-1, add to the power
line a protection fuse acting as disconnection element, easily acces -
sible to the operator and identified as a protection device.
Power ‘H’ fuse 250 mA time lag
Power ‘L’ fuse 400 mA time lag
1.7 Power connections
1.6 Front view
Button ‘UP’
Logo
Alarms
Units
Button ‘SQ’
‘Configuration menu’
(see section 1.28)
‘Fast access‘
(see section 1.28.6)
1.8 Start up sequence
Signal
(see section 1.10)
Option 1 Option 2 Option 3
Power
(see section 1.7)
Detail of the plug-in screw terminals provided with
the instrument. The instrument is provided with all
terminals needed, both male and female.
1.9 Rear view
1.10 Signal connections
The instrument follows the sequence indicated below at start-up af -
ter a power loss :
1. alarm status according to configuration
(see section 1.28.8)
2. start up delay according to configuration (see section 1.28.8)
3. all registers initialized to value ‘0’
3.1 display set to ‘0’
4. detection of the active working mode ‘Full slave’ or ‘Process
slave’ or ‘Text’
4.1 in ‘Full slave’ mode (see section 1.3) and ‘Text’ mode (see
section 1.4) the alarm state is set as explained in ‘1.’ and alarm
registers are set to ‘0’
4.2 in ‘Process slave’ mode
(see section 1.2)
alarm configura -
tion (setpoint, etc) is compared with display value (‘0’) and
each alarm activates or deactivates according to the result of
the comparison
5. waits for data reception through the communications bus
1 2 3 4 5
Rx1
Rx2
Tx2
Gnd
Tx1
Note : instruments allow for serial connection of multiple in -
struments, by using a ‘Daisy-chain’ connection type. Frames
send from the Master to the first instrument are received at
terminal Rx1. If the destination address indicated in the frame
is not that of the instrument, the instrument will retransmit
the frame through terminal Tx2 to the next instrument, and so
on. In a same way, frames received from terminal Rx2 will be
retransmitted through terminal Tx1.