Measurement Specialties PCI-DIO24 - Manual (Page 15)

15
Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Power consumption
Table 1. Power consumption specifications
+5V operating 240 typical, 350 max
Digital input / output
Table 2. Digital input / output specifications
Digital type 82C55
Configuration 2 banks of 8, 2 banks of 4, programmable by bank as input or output
Number of channels 24 I/O
Output high 3.7 volts min @ -2.5 mA
Output low 0.4 volts max @ 2.5 mA
Input high 2.2 volts min, 5.3 volts absolute max
Input low 0.8 volts max, -0.3 volts absolute min
Power-up / reset state Input mode (high impedance)
Interrupts INTA# - mapped to IRQn via PCI BIOS at boot-time
Interrupt enable External (IR ENABLE, active low, disabled by default through internal resistor to
TTL high) and programmable through PCI9052;
0 = disabled, 1 = enabled (default)
Interrupt sources External source (IR INPUT), polarity programmable through PCI9052;
1 = active high, 0 = active low (default)
Environmental
Table 3. Environmental specifications
Operating temperature range 0 to 50 °C
Storage temperature range -20 to 70 °C
Humidity 0 to 90% non-condensing