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M880 ALL EN 2.7.2.docx
7.13.
Data feedback card (PCB262)
The data feedback card is used when it is necessary to collect data from the application and send it
via radio to the display of the transmitting unit. Data collection can be done
by means of 16 digital
inputs (OPTOCOUPLED) and 8 analog inputs (voltage or current configurable). The card features also
a CAN BUS connection and a serial line (standard RS232 or RS485).
Note:
The choice between RS232 or RS485 is done during the card’s mounting phase.
The voltage/current analog reading is selected by the solder jumpers T0..T7 and T8..T15.
500 ohm Zin of current analog input (the source must be able to supply at least 10V to the
inlet of the card). The trimmers R1..R8 are used for a fine adjustment.
The DIP SWITCH SW1 is set according to the customer’s instructions.
Terminal
Description
CAN-H,CAN-L
Outputs for CAN BUS connection
D0 .. D15
Digital inputs (optocoupled) (24V, Zin > 3.3k)
COM1/2
Common reference (ground) for digital inputs (COM1 related to
D8..D15; COM2 related to D0..D7)
AD IN 0,.,AD IN7
Analog inputs (12 bit) (VIN_max 10V)
+10V
Auxiliary power supply (Imax = 100 mA)
GND
Ground reference for analog signals
VCC
Power supply
CURRENT GAIN AD IN0-AD IN7
Set-up trimmer for AD0-AD7 analog inputs
RS232/485
Serial communication port