Siemens SIMATIC CM 1243‑2 – AS‑Interface Master Module (3RK7243‑2AA30‑0XB0)

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SIEMENS
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  • AS?Interface (AS?i) Master communication module for SIMATIC?S7?1200, compliant with AS?i v3.0 standard and Master M4 profile
  • Supports up to 496 I/O points and 62 AS?i slaves, with bus cycle time of 5?ms (31 slaves) or 10?ms (62 slaves)
  • Powered via PLC backplane, drawing max 250?mA, with AS?i bus supply up to 100?mA at 30?V
  • Compact design: 30 × 100 × 75?mm, DIN?rail mount, IP20 protection
  • Power dissipation: ~2.9?W, supports galvanic isolation
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Description
Attribute Details
Module AS‑Interface Master CM 1243‑2
Part Number 3RK7243‑2AA30‑0XB0
AS‑Interface Standard AS‑i v3.0, Master M4 profile
Max I/O Points 496
Max AS‑i Slaves 62
Bus Cycle Time 5 ms (@31 slaves), 10 ms (@62 slaves)
Power Supply 250 mA via backplane; 100 mA over AS‑i bus
Power Dissipation ~2.9 W
Galvanic Isolation Yes
Construction 30 × 100 × 75 mm; 0.154 kg
Protection Rating IP20
Temperature Range (Horizontal) 0–55 °C
Temperature Range (Vertical) 0–45 °C
Storage/Transport Range –40…+70 °C
Humidity 5–95 % non-condensing
Mounting Snap-on DIN-rail
Diagnostics AS‑i, PF, CM, CER, DIAG LEDs
Safety Functions None

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