1144028-03 AK ERM 2280 2800 Heidenhain Encoder 671706-03

Product overview

The AK ERM 2280 2800 03S12-03 is HEIDENHAIN’s modular scanning head for the ERM 2280 magnetic ring (scale drum). It delivers high-quality 1 Vpp sin/cos incremental signals, features distance-coded reference marks, and is engineered for harsh shop-floor environments where coolant, chips, and oil are present—typical of lathe C-axes, rotary/tilting tables, and high-speed spindles.

Model identification & cross-reference

• Exact model: AK ERM 2280 2800 03S12-03

• Old HEIDENHAIN ID: 671706-03

• New/replacement ID: 1144028-03
  Independent distributor listings show that 671706-03 and 1144028-03 both correspond to AK ERM 2280 2800 03S12-03, confirming the old→new ID mapping.

Key technical highlights (size “2800 lines”)

• Interface: ~1 Vpp incremental (sin/cos)

• Cutoff frequency (-3 dB): ≥300 kHz

• Reference marks: Distance-coded (enables fast homing)

• Supply: 5 V DC ±10%; ≤150 mA (no load)

• Environmental: IP67, operating –10…+60 °C

• Connection: M23 12-pin (pinout for A+, A–, B+, B–, R+, R–, UP/0 V; sensor lines tied to supply)

• Cable options: 1 m cable; up to 150 m with HEIDENHAIN cable

• Matching ring (scale drum): TTR ERM 2200C, 2800 lines

  • Inside Ø (ring): 130 mm

  • Outside Ø (ring): 176.03 mm

  • System accuracy (before installation): ±11″

  • Absolute reference angle: ≤14.4°

  • Mechanical permissible speed: ≤9 000 min⁻¹ (for this size)
    All values above are from HEIDENHAIN’s ERM 2280 product information.

What makes ERM 2280 dependable on the shop floor

• Magnetic measuring standard (MAGNODUR) + magnetoresistive scanning: robust signal generation even with contamination.

• High speed capability and simple alignment (0.05 mm spacer shim) for fast installation and long-term stability.

Electrical interface & pinout (summary)

• Output: ~1 Vpp (A, Ā, B, B̄, R, R̄)

• Supply: 5 V DC (±10%); sensor lines internally tied to supply rails

• Connector style: M23 12-pin (coupling/connector options)
  HEIDENHAIN’s pin layout for the ERM 2280 scanning head is documented with the exact M23 12-pin assignment.

Typical applications

• C-axis feedback on lathes, rotary tables, and tilting axes requiring stable signals at high speeds and in contaminated environments.

Why source from EncoderMarket.com

EncoderMarket (encodermarket.com) is ready to supply the AK ERM 2280 2800 03S12-03 (ID 1144028-03)—fully original HEIDENHAIN—with optimised lead times and aggressive pricing for OEMs and maintenance teams.

• Request a quote / lead time: info@encodermarket.com

• We also help cross-reference the old ID 671706-03 in existing BOMs and retrofit kits, and support configuration questions (ring size, cabling, mating electronics).

Full technical specification (concise)

Scanning head (AK ERM 2280)
• Output: ~1 Vpp sin/cos | f_c ≥ 300 kHz | Signal period ≈ 200 µm | Supply 5 V ±10% (≤150 mA no-load) | Cable 1 m; up to 150 m with HEIDENHAIN cable | IP67 | –10…+60 °C | Vibration 55–2000 Hz ≤ 400 m/s² | Shock (6 ms) ≤ 1000 m/s².

Scale drum (TTR ERM 2200C), 2800-line variant
• Inside Ø 130 mm | Outside Ø 176.03 mm | System accuracy ±11″ (before installation) | Distance-coded reference marks (absolute reference ≤ 14.4°) | n_max ≤ 9000 min⁻¹ | Permissible axial motion ±1.25 mm.

Notes for integration

• Observe mounting gap using the supplied 0.05 mm spacer; when tolerances are met, no signal readjustment is typically required.

• For wiring to drives/controls and interpolation electronics, follow the M23 12-pin map and HEIDENHAIN interface guidelines.