The Discrete Input/Output card is a microprocessor-based interface that provides communications between various input/output terminations and a control unit. The card communicates with the control unit via a serial bus. This card can be configured for any of the following valid channel
types:
- Discrete latching output
- Discrete momentary output
- Discrete input
- Time proportional output (Continuous or One Shot)
- Pulse count input
Channel Densities and Mixing Limitations:
- 16 Channels maximum (Din and Dout combined)
- Any mixture of Din with Dout Latching or Dout Momentary
- Dout-latching and Dout Momentary cannot be mixed in the same group of 8 channels (1-8 or 9-16)
- 8 channels maximum for Time Proportional Outputs
- No mixing of Time Proportional Output channels with an other channel type
- 8 channels maximum for Pulse Count Inputs (must be channels 1-8)
- No mixing of Pulse Count Input channels with any other channel type
Power-up
The Discrete I/O Card can be removed or installed under
power. Power-up can occur when the file is powered up or
when the Discrete I/O card is inserted into a powered-up
file. Power-up self test is performed and the card enters
the "Unconfigured" state and waits for a valid configura-
tion before going "on-line".
Normal Operation
- Controls and maintains the input and output channels
- Communicates serially via the backplane
- Can support Discrete I/O card redundancy
- Performs periodic self-test
- Utilizes and exception reporting mode for integrity and channel data
- A copy of the configuration for every I/O card on the subsystem is maintained by the Serial Driver in battery backed up RAM.
Any questions? Please call us at 281-421-1321.
