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Programmable relay, 24VDC supply, 6x 24VDC inputs (2 of which can be 0-10V analogue inputs), 4x relay outputs 5A, RTC, LCD display,expandable With the choice of 4 different 10 I/O CPU units we fulfill all needed functionality to do all kind of control automation. Three of them (C1/C2/C4) are expandable up-to 34 I/O. The C3 has fixed 10 I/O. All DC models have analogue input and a high-speed counter input up to 150Hz. The C4 model is equipped with communication. DC input/supply units have analogue input + high speed counter. The ZEN-10C4 has RS-485 communication Expansion available with relay output or transistor output