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The
H-SERIES PLC are a family of small, low cost, pure relay-ladder logic based PLC that are available since 1993. The family spans from the T22H with 12 inputs, 10 outputs to the T64H with 40 inputs and 24 outputs. Members of the H-series controller family differ mainly in the number of I/Os (inputs/outputs), and the type of I/Os they carry (relay or transistor outputs, PNP or NPN types, opto-isolator inputs or high voltage inputs, etc). Each different PLC model has different wiring requirements.
The H-series PLC includes the T22H-NPN, T28H-Relay, T40H-Relay, T44H-PNP, T44H-NPN and the
T64H-Relay. This family has two (2) type which are comes with
relay and NPN/PNP. The following table summarizes the number of I/Os, timers, counters and internal relays for each existing model: |
