8 Channel Digital Input Board
The XIO-DI8 performs the interface function of isolating and conditioning external input voltage signals into levels compatible with standard 8-bit TTL/CMOS digital ports such as those found on Single-Board-Computers and Microcontrollers. Eight optically isolated and non-polarized input channels allows any combination of DC or AC signals to be monitored.
The input voltage range for each channel is individually configured by means of a socketed resistor. In addition, low-pass filters can be selectively enabled for the reliable measurement of AC or noisy DC signals. The eight conditioned channels form a byte where each bit reflects the state of one input, Bit-0 = IN0, Bit-1 = IN1 and so on. Activated inputs cause a logic "1" to appear in the associated bit position. The byte is buffered and drives one of three possible Host digital input ports.
Which Host port will be driven is determined by installing a single resistor network in one of three corresponding DIP sockets. This routes the output byte to only the designated Host input port. The two remaining Host ports remain unaffected and available for other purposes, including additional XIO family boards.
Connections between the Host and XIO-DI8 is made through dual IDC headers which directly support the two most common pinout arrangements. Other pinouts are easily accommodated using custom cable assemblies. Field wiring is made through a single 16-position removable screw-terminal strip that accepts wires in the range of 12-24 AWG.
The XIO-DI8 operates from a single +5Vdc supply which can be provided by the Host, through either of the IDC headers, or externally by means of a two-position removable screw-terminal strip.
For ease of installation, the XIO-DI8 can be mounted in one of three ways: Placed within a 3" SNAPTRACK® (121-0003), By using standoffs, or By attaching it to a DIN rail using optional SNAPTRACK® adapter clips (121-0004).
- Allows an 8-bit digital input port to monitor combinations of AC and DC voltage input signals
- 500V isolation between Host and field signals
- Hardware programmable input voltage range on each channel
- Dual IDC input headers support the two common digital I/O pin-outs
- Input filters ensure reliable measurement of AC or noisy DC signals
- Works with products from SCIDYNE and as well as from other manufactures
- Product Bulletin (pb7656.pdf)
- User's Reference Manual (XIO-DI8-.pdf)
|Description:||Eight channel optically-isolated digital input interface board|
|Power Requirement:||+5Vdc ±5% @ 125mA typical.|
Host or Externally supplied, Power-On LED
|Environmental:||Operating temperature: -20°C to 70°C|
Non-condensing relative humidity: 5% to 95%
|Product Origin:||Designed, Engineered, and Assembled in U.S.A. by SCIDYNE Corporation using domestic and foreign components.|
|Dimensions:||3.00" W x 9.50" L x 1.35" H|
|Mounting:||Mount using Standoffs, SNAPTRACK® or DIN Rail|
|Isolation:||500V DC or AC, input-to-output|
Isolation between adjacent input channels: 250V maximum
|Digital Inputs from Field:|
|General:||Eight independent non-polarized optically isolated inputs, Status LEDs|
|Connections:||16-position removable screw-terminal strip, accepts wires 12-24 AWG|
|Input Voltage:||Each channel is programmable by means of a socketed resistor|
DC: 3V minimum, 250V maximum, non-polarized
AC: 3VPP minimum, 250VPP maximum, 40hz to 1khz
|Input Current:||3.5ma Minimum, 25ma Maximum per input|
|Input Power:||1.4watts Maximum per input|
|Propagation Delay:||Input channel to output bit. Measured with 5Vinput signal, Rin = 1kΩ |
Filter Disabled: On: 40μs Off: 100μs
Filter Enabled: On: 20ms Off: 85ms
|AC Input Filter:||RC type Low-Pass. Switch selectable on a per input basis|
|Digital Output to Host:|
|General:||Drives one of three 8-bit ports, Port selected by DIP resistor network|
|Connections:||50-Pin and 26Pin IDC headers. Supports the two most common pin outs|
|Output Levels:||TTL/CMOS compatible|
Logic "0": 1.35Vdc maximum
Logic "1": 3.15Vdc minimum
|Output Impedance:||Driven port: 47Ω , primarily from output resistor network|
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