PCIe-DIO24Specifications

September 2018. Rev 1.2© Measurement Computing Corporation

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PCIe-DIO24-spec2Specifications
All specifications are subject to change without notice.
Typical for 25 °C unless otherwise specified.

Digital input/output
Table 1. Digital I/O specifications
Parameter

Specification

Digital type
Configuration

82C55 Emulation (mode 0 only)
2 banks of 8, 2 banks of 4, programmable by bank as input or output
Ports A and B: 74HC245A
Port C:74HC126
Ports A and B: 74HC245A
Port C:
74HC125
24 I/O
Board silk screen reference: S1 – Default +5V
2.8 volts min @ -2.5 mA
0.3 volts max @ 2.5 mA
2.6 volts min, 3.6 volts absolute max
1.3 volts max, -0.5 volts absolute min
4.5 volts min @ -2.5 mA
0.3 volts max @ 2.5 mA
2.6 volts min, 5.5 volts absolute max
1.3 volts max, -0.5 volts absolute min
Input mode (10 kΩ impedance from pull-up or pull-down)

Output
Input
Number of channels
Switch stateOutput highOutput low
Input highInput lowOutput highOutput low
Input highInput low
Power-up /reset state

3.3 V5V

Pull-up/pull-down resistors
Interrupt enable
Interrupt sources

EEPROM stored; software programmable driven by 74ACT244 through 10 kΩ bussed
resistor networks (shipped in the pull-up state)
External (IRQ ENABLE, active low, disabled by default through internal resistor to TTLhigh) and programmable through PCI9030; 0 = disabled, 1 = enabled (default)
External source (IRQ INPUT), polarity programmable through PCI9030;
1 = active high, 0 = active low (default)

Power consumption
Table 2. Power consumption specifications
Parameter

Specification+3.3 V operating+3.3 V with 5 V I/O+VDIO User output

515 mA typ520 mA typ
125 mA max @ +5V; 375 mA max @ +3.3 V+VDIO User output and +12 V:
Littelfuse 0.375A NANO2® Slo-Blo® Subminiature Surface Mount Fuse; art number
0452.375

Fuses

3

Specifications: PCIe-DIO24

Specifications

Environmental
Table 3. Environmental specifications
Parameter

Specification

Operating temperature range
Storage temperature range
Humidity

0 °C to 50 °C–20 °C to 70 °C
0% to 90% non-condensing

Mechanical
Table 4. Environmental specifications
Parameter

Specification

Dimensions (L × W × H)

167.4 × 111.2 × 18.72 mm (6.60 × 4.38 × 0.74 in.)Bus
Table 5. Bus specifications
Parameter

Specification

Bus TypeBus Width

PCI Express 1.1
x1 lane PCI Express

Signal connector
Table 6. Main connector specifications
Parameter

Specification

Connector typeCompatible accessory products(with the C37FF-x or
C37FFS-x cable)

37-pin D-type
C37FF-x unshielded ribbon cable. x = length in feet.
C37FFS-x cable shielded round cable. x = length in feet.
SCB-37
CIO-MINI37
CIO-MINI37-VERT

Compatible accessory productswith S1 in the +5 V position(with the C37FF-x or C37FFSx cable)

CIO-ERB08
CIO-SERB08
CIO-ERB24

Compatible cables

SSR-RACK08
SSR-RACK244

Specifications: PCIe-DIO24

Specifications

Table 7. Signal connector pinout
Pin
12345678910111213141516171819

Note 1:Signal NameIRQ INPUT
IRQ ENABLE
Port B7
Port B6
Port B5
Port B4
Port B3
Port B2
Port B1
Port B0
GND
OPEN
GND
OPEN
GND+12V (Note 1)
GND+VDIO (Note 1)
GND

Pin202122232425262728293031323334353637Signal Name+VDIO (Note 1)
GND
Port C7Port C6Port C5Port C4Port C3
Port C2Port C1
Port C0Port A7
Port A6
Port A5Port A4
Port A3
Port A2
Port A1
Port A0

Protected by slow blow fuses rated at 0.375 A. One fuse protects pin 16 (+12V), and the second fuse protects
pin 18 (+VDIO) and pin 20 (+VDIO).

5

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