The 20-410 Digital Input/Output Module offers a choice of port configurations up to a maximum of 128-bits. Modules can be specified as all inputs, all outputs or a combination of both. All inputs are compatible with TTL voltage levels and are suitable for receiving signals from logic circuits or sensors with TTL level outputs. Outputs can be specified as either TTL, suitable for driving standard logic, or Open-Collector, for driving higher current loads such as relay coils. The Open-Collector option can tolerate up to 50V and sink up to 500mA of current.
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