Weq EBA Guia De Instalacion/Configuracion página 7

NOTE
Rc = Minimum required resistance of 500 W to maximum corrent of 50 mA at 24 V
(according to table 8).
The digital input DI8 includes a special function for motor thermistor (PTC). The
available configuration is shown on Fig.9.
Figure 9: Connection and operation of the
digital input DI8 with the motor thermistor function
If DI8 should be used as a normal digital input, insert a resistor as indicated below: (fig 10)
3.3 Physical connection of the RS-485 interface
1) Line termination: include line termination (120 ) only at the network ends. (See table 2
or 4 - fig.11);
2) Recommended cable: balanced shielding to operate with differential signals (ex.: AFS
series from KMP , etc.);
3) Grounding of the cable shield: connect the shielding to the equipment frame;
4) Minimum distance from RS-485 network to the other wires, see table 7.
Master of the net
(PC, CLP)
RS-485
Figure 11: CFW-09 network
connection trough RS-485
serial interface
Temperature increase
Inactive/No error
without error
Inactive/No error Active/E32
Temperature
1k6
PTC resistance oscillattion in ohms( )
Figure 10: Configuration of DI8 to be used as a digital
input (program every function at P270 excepting 16)
CFW-09 CFW-09
(EBA or EBB Board) (EBA or EBB Board)
Shield of
the cable
Shield of
the cable
Inactive/
Active/E32
Active/E32
decrease
3k9
CFW-09
(EBA or EBB Board)
5