Specifications:

• General Features:
• CPU type: SIMATIC S7-300 CPU 314.
• Firmware version: V3.3.
• HW functional status: 01.
• Programming software: STEP 7 V5.5 + SP1 or higher.
• Memory card required: Micro Memory Card (MMC) up to 8 MB.
• Retentive memory: Yes (via MMC, maintenance-free).
• Real-time clock: Yes, retentive and synchronically.
• Clock backup time: 6 weeks at 40°C.
• Electrical Characteristics:
• Supply voltage: 24 V DC (range: 19.2–28.8 V).
• Rated current consumption: 650 mA.
• Inrush current: 3.5 A.
• Power loss: ~4 W.
• Mains buffering: 5 ms.
• Memory & Processing:
• Work memory: 128 KB.
• Load memory: via MMC (max. 8 MB).
• Bit operation time: 0.06 µs.
• Word operation time: 0.12 µs.
• Floating point operation: 0.59 µs.
• Max blocks: 1024 DBs, FCs, FBs (64 KB each).
• Data & Addressing:
• I/O address space: 1024 bytes each for inputs and outputs.
• Process image: 128 bytes default, adjustable up to 1024 bytes.
• Retentive flag memory: MB 0–255 (preset MB 0–15).
• Timers/Counters: 256 S7 timers & counters, IEC types supported.
• Local data per block: up to 2 KB.
• Interfaces & Communication:
• Integrated interface: RS485 (MPI).
• Transmission rate: up to 187.5 kbit/s.
• Supported protocols: MPI, S7 communication (server only), global data, PG/OP.
• Max connections: 12 total (PG, OP, S7 basic).
• No integrated PROFINET or PROFIBUS DP.
• Expansion & Modules:
• Expansion units: up to 3.
• Max modules per rack: 8.
• Max racks: 4.
• Supported modules: FM (8), CP PtP (8), CP LAN (10).
• Environmental Conditions:
• Operating temperature: 0°C to +60°C.
• Storage temperature: -40°C to +70°C.
• Shock resistance: 15 g over 11 ms.
• Vibration resistance: IEC 60068-2-6 compliant.
• Pollution degree: 2.
• Dimensions & Weight:
• Width: 40 mm.
• Height: 125 mm.
• Depth: 130 mm.
• Weight: ~280 g.
• Approvals & Compliance:
• CE, UKCA, UL, ATEX, IECEx, RCM, CCC.
• RoHS: Compliant.
• Marine certifications: ABS, DNV, BV, LRS, NK, PRS.