Octagon 6000 Series, User Manual

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6-7
6000 Series user’s manual EZ I/O
Figure 6-4 Location of EZ I/O in the 6050
A
B
C
EZ I/O digital I/O chip
8
8
Base
Base + 1
Base + 2
Base + 3
Control
Register
8
J1
26-position connector
or
or
output only
UNL2804
high current outputs
6050
See Table 6-10 for the 6050 EZ I/O base address selection.
Note For the location of J1, refer to the component diagram in the 6050
technical data appendix.
6050 high current port
The high current port is used as dedicated outputs to drive relays,
LEDs, solenoids, and similar devices. The port includes eight I/O lines
at J1, port B. These outputs switch loads to ground.
On powerup, all high current driver inputs are pulled LOW. This forces
all high current outputs OFF. The user program must configure port B
as outputs and then control the state of each bit of the port. The outputs
of port B are inverted. A written logic 1 switches the current driver to
ON and switches current to ground. A written logic 0 opens the switch
and the outputs are pulled high.
Note When ON, the saturation voltages are incompatible with TTL logic
levels and should not be used to drive other logic devices.
Considerations for high current outputs
n
Each of the high current outputs can sink 500 mA at 50V. However,
the package dissipation will be exceeded if all outputs are used at
the maximum rating. The following conservative guidelines assume
the number of outputs are on simultaneously. The following derat-
ing is based upon an ambient temperature of 70° C.