
C ONTR OL S YS TE MS
J224 PCO24
2192-10479-000-000
Page 3
Introduction
The PCO24 is an 8-bit ISA bus add-on board providing 24 opto-isolated outputs. These
outputs are organised into three groups of 8. The board also includes a link for defining the
state of the outputs on power-up/reset. The board is designed for driving relays, lamps and
solenoids whilst maintaining electrical isolation between the devices being driven and the PC.
It is necessary to provide an isolated external power supply to drive the devices that the
PCO24 is switching.
Features
CE compliant design
24 opto-isolated digital outputs
Input/Output Isolation: 100V DC
Channel/Channel Isolation: 100V DC
Darlington configuration transistor output devices with reverse protection diodes
Each output can sink up to 400mA of current to the group’s common 0V line while
withstanding voltages of up to 50V
Output current per line: one line per group on 400mA
all eight lines on 175mA
Output voltage range 10 to 50V DC
Opto-isolator rise time 60 microseconds
Opto-isolator fall time 40 microseconds
A separate common connection supplies bias current and a common point for the output
protection diodes on each group
Output state of each group can be read back
Compact I/O addressing scheme (switch selectable base address)
Board access LED
User controlled LED
Operating temperature range, 0°C to 55°C
Power consumption 300mA @ 5V
MTBF: 273,586 hours (using generic figures from MIL-HDBK-217F at benign ground)
Getting started
Switch off PC
Install board in supplied configuration
Switch on PC
Run EXAMP-01.EXE (supplied on the utility disk)
An access/user LED should flash. If not check default link configuration(Page 6).