Main Characteristic Value(s) Range of Product Modicon Quantum automation platform Product or Component Type Unity processor Complementary Characteristic Value(s) Clock frequency 66 MHz Number of slots 2410166 Number of racks 2 - local Number of distributed I/O station 63 1 3 Modbus Plus Number of remote I/O station 31 - 2 S908 remote I/O0 - 0 ethernet remote I/O Discrete I/O number 31744 inputs, 31744 outputs - remote8000 inputs, 8000 outputs - distributed - per network Modbus PlusUnlimited (26 slots max) - local Analogue I/O number 500 inputs, 500 outputs - distributed - per network Modbus Plus1984 inputs,1984 outputs - S908 remote I/OUnlimited (26 slots max) - local Application specific I/O Serial linkCounterHigh-speed interrupt inputsAccurate time stamping Number of optional modules 6 Ethernet, Modbus, Modbus Plus, Profibus DP, Sy/Max) Maximum number of connections 2 AS-Interface - distributed2 Modbus RS232/485 Modbus/ASCII)4 AS-Interface - remote6 Ethernet TCP/IP - local6 Modbus Plus - local6 Profibus DP - local Integrated connection type 1 Modbus Plus2 Modbus Checks Process control Memory description Internal RAM 1056 kB Switch Function Key switch memory start/stop memory protectionSlide switch communication port : ASCII/RTU/Memory Application structure 1 cyclic/periodic master task - 1 periodic fast task - 16 timer interrupt tasks - 64 I/O interrupt tasks - 64 interrupt tasks - No auxiliary task - Execution time per instruction 0.1...0.27 µs floating points0.1...0.27 µs on fixed-point arithmetic0.12...0.585 µs Boolean0.12...0.585 µs on word Number of instructions per ms 1.86 Kinst/ms 100 % Boolean2.49 Kinst/ms 65 % Boolean and 35 % numerical System overhead 0.2 ms fast task1 ms master task Bus current requirement 1800 mA Local signalling 1 LED (green) for communications are active on the Modbus Plus port (Modbus Plus)1 LED (green) for communications are active on the Modbus port (Modbus)1 LED (green) for CPU has been started and is solving logic (RUN)1 LED (green) for CPU has passed the power-up diagnostic tests (READY)1 LED (orange) for write-protected memory (memory port)1 LED (red) for battery needs replacing or is not present (BAT LOW)1 LED (red) for communications error on the Modbus Plus port (ERROR A) Electrical connection 1 female connector SUB-D 9 for connecting to the Modbus Plus network2 female connectors SUB-D 9 for connecting to the Modbus bus
