SC6000
62
A
By default, OUT1 is associated with COMPLETE READ event, which activates when the code
has been read correctly. In case the reader has been programmed to read several codes
within the same reading phase, the event activates when all codes have been read.
OUT2 is associated with NO READ event, which activates when no code has been read.
OUT3 - OUT6 are associated with NONE, which means that the output is always in line state.
Isolation between the command logic and the SC6000 is maintained by powering the outputs
with an external supply voltage (Vext). For convenience, the outputs can be powered using
the VS_OUTPUTS signal on the SC6000 (pin 1). In this case, however, the device is no
longer electrically isolated. The VS_OUTPUTS on the Extended I/O connector is short-circuit
protected.
The electrical features of these outputs are:
Collector-emitter voltage
30 V Max.
Collector current
130 mA Max.
Saturation voltage (VCE)
1 V at 10 mA Max.
Maximum power dissipation
90 mW at 50°C (Ambient temperature).
The limit requested by the maximum power dissipation is more important than that of the
maximum collector current: if one of these outputs is continuously driven, the maximum
current must not be more than 40 mA although 130 mA may be reached in pulse conditions.
SC6000
USER INTERFACE
+
Ground
Vext
C
E
-
PWO
V
Signal
Figure 51 - Open Collector Output Connection with Electrical Isolation
V
USER INTERFACE
Ground
SC6000
+
-
GND
VS_OUTPUTS
Signal
PWO
Figure 52 - Open Collector Output Connection Using System Power
