HEIDENHAIN LID 351 / LID 351 C Exposed Linear Encoder
Legacy catalog product. Confirm repair, replacement and availability with AMI for your exact unit.
Confirm the configuration from your unit label.
The HEIDENHAIN LID 351 and LID 351 C are incremental exposed linear encoders (transmitted light) with a DIADUR glass scale, for high resolution with high accuracy, with an integrated adjustment aid for easy installation Measuring lengths run up to 1500 mm.
If your unit is giving trouble, Automation and Metrology can evaluate it before you commit to a replacement. Send the model and nameplate details so we can confirm the configuration.
Machine down? Call 1-888-354-2525.
Technical data
| Measuring standard | DIADUR glass scale |
|---|---|
| Grating period | 10 µm |
| Recommended measuring steps | 1 µm, 0.5 µm, 0.2 µm, 0.1 µm or 0.05 µm |
| Accuracy grades | ±1 µm; ±0.5 µm up to 500 mm measuring length only; ±0.2 µm up to 200 mm measuring length only |
| Reference marks | LID 351: one reference mark at mid-point of measuring length as standard; special types with one reference mark at any location, or several at 20 mm spacings or multiples. LID 351 C: distance-coded reference marks |
| Measuring lengths | 50, 70, 120, 170, 220, 270, 320, 370, 420, 470, 520, 570, 620, 670, 720, 770, 820, 870, 920, 970, 1020, 1140, 1240, 1340, 1440 or 1500 mm |
| Maximum traversing speed | Depends on subsequent electronics |
| Maximum vibration (50 to 2000 Hz) | 8 m/s² with resolution 0.05 µm up to 0.5 µm; 50 m/s² with resolution 1 µm and coarser |
| Maximum shock (11 ms) | 100 m/s² |
| Operating temperature | 0 to 50 °C |
| Storage temperature | -20 to 70 °C |
| Weight | Scanning head 0.85 kg; scale 0.5 kg/m |
| Connecting cable | 3 m with connector |
| Light source | LED |
| Operating voltage | 5 V ±5% |
| Catalog current draw | 120 mA |
| Incremental output | Two sinusoidal current signals I1 and I2, approximately 7 to 16 µA peak-to-peak with 1 kΩ load |
| Reference signal | One signal I0, approximately 2 to 8 µA (usable portion) |
| Total permissible cable length | 20 m |
These are historical catalog values, not a current availability or interchangeability claim. Match the exact model and configuration on your unit.
Pricing and lead times on request. Use Add to Quote and include the nameplate ID and configuration.
Documents
HEIDENHAIN LID 351 / LID 351 C catalog specifications with AMI stamp, November 1988, pp.36-37 (PDF)