Absolute Encoders for Feedback for CNC/PLC: SHG-A4 Linear


SHG-A4 Linear Encoder

RS485 meets the requirement of a multi-point communication network, which can have up to 32 drivers and 32 receivers on a single two-wire bus. A key feature is the ability to address individual devices. This model can be ordered with unique address tags. Developed to meet a wide range of feedback applications, the SHG-A4 absolute linear encoder provides a true absolute position immediately upon power-up. The encoder does not use batteries or static memory to retain the positional data. True position can be reacquired once power is applied, regardless of duration or power-off movements. Click here to learn more about Newall's Inductive Encoder Technology Download SHG-A4 Linear Encoder Documents: SHG-A4 Protocol (pdf) SHG-A_ Installation Manual (pdf) Newall Linear Encoder Catalog (pdf) SHG-A4 Dimensional Drawing Under 100" (2540mm) (SHG-A4 Dimensional Drawing Under 100" (2540mm)) SHG-A4 Dimensional Drawing Over 100" (2540mm) (SHG-A4 Dimensional Drawing Over 100" (2540mm))

 

Specifications

Output Signal RS485
Accuracy/Meter ±0.0004", ±0.0002", ±0.0001"(±10µm, ±5µm, ±3µm)
Resolutions 10µm, 5µm, 1µm or 0.5µm
Scale Travels 4" to 137.8" (102mm to 3.5m)
Scale Diameter 0.601" (15.25mm)
Reader Head Dimensions 2.05"H x 5.16"L x 1.10"D (52mm x 131mm x 28mm)
Reference Marker n/a
Maximum Traverse Rate n/a
Power Supply 5VDC ±5%, <350mA
Shock (11ms) 100g (IEC 69-2-6)
Vibration (55-2000Hz) 30g (IEC 68-2-27)
Sample Period 50µs
Environmental Rating IP67, fully submersible (IEC 529) - Exceeds NEMA 6
Operating Temperature 32° to 131°F (0° to 55°C)
Coefficient of Expansion 12 x 10-6K
Scale Material 316 stainless steel
Overall Scale Length Scale travel length + 10.2" (258mm)
Standard Cable 15 core, 11.5' (3.5m) armored
Maximum Cable Length 65.6' (20m)
Standard Connector 15 pin "D" type
EMC Compliance BS EN 61000-6-2 and BS EN 61000-6-4

Options

Resolutions Custom resolutions available
Non-Armored Cable PUR (polyurethane)
Connectors • IP67 (NEMA 6) • None (flying lead)
Cable Lengths 22' (7m) or 19.68" (0.5m)

Quick and Easy Installation

The design of these linear encoders allow installment in almost any position, unlike glass-scale linear encoders, which usually need to be installed with the lip seal facing downwards to prevent contamination. Self-aligning fixing brackets allow virtually effortless scale mounting, needing only a single hole for each set of brackets.

 

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