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J206 PCIB40 Technical Manual
Introduction
The PCIB40 is an 8-bit ISA bus add-on board providing 40 channels of digital I/O and three 16-bit
counter/timers. The digital I/O is organised into 5 groups of 8 bits. Each I/O channel may be
configured as an input or an output. The board also includes the facility to define the power-
up/reset state of a group of output bits. This is extremely useful in ensuring the safe start-up of a
PC-controlled system. The 3 counter/timers are implemented using the industry-standard 8254
device. One timer can be used as a periodic interrupt generator while the other two timers can be
connected to external signals for frequency measurement and pulse generation.
The D-50 I/O connector conforms to Arcom’s standard Signal Conditioning System (SCS) and may
be used to drive a range of Signal Conditioning Boards (SCB); see Arcom’s PCbus catalogue for
more details.
Features
• CE compliant design
• 40-channel digital I/O
• Three 16-bit counter/timers with max count rate (input and output) 1MHz
• Compact I/O addressing scheme (link selectable base address)
• Link-selectable interrupt options (IRQ2,3,4,5,7)
• Each channel has a current sink capability of
24mA @ 0.45V
and source current of
500
µA @ 2.7V
• Bit programmable for input or output
• Group selection of powerup/reset state.
• Board access LED (for all decoded addresses)
• User controlled LED
• 8-bit bus interface
• I/O connector conforms to Arcom Signal Conditioning System (SCS)
• Operating temperature range, +5
°C to +55°C
• Power consumption from the host, max 300mA @ +5V
• MTBF: 477,000 hours (using generic figures from MIL-HDBK-217F at ground benign)
Getting Started
• Switch off PC
• Install Board in supplied configuration
• Switch on PC
• Run TEST.EXE (supplied on utility disk)
• An access/user LED should flash. If not check default link configuration. (Page 7)
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