Rail Types AMS 4B S 20
| AMS 4B S 20-N | AMS 4B S 20-C | AMS 4B S 20-ND | AMS 4B S 20-CD |
 |  |  |  |
| Standard | With Cover | Fully Hardened Standard | Fully Hardened with Cover |
Rail Dimensions AMS 4B S 20
Rail Specifications AMS 4B S 20
| Parameter | AMS 4B S 20-N |
| Rail Width B1 (mm) | 20 |
| Rail Height J1 (mm) | 19 |
| Max Single Piece Length L3 (mm) | 3000 |
| Mounting Hole Pitch L4 (mm) | 60 |
| First/Last Hole Position L5/L10 (mm) | 28.5 |
| Weight per Meter (kg/m) | 2.2 |
Carriage Types AMS 4B W 20
| W-A | W-B | W-C | W-D |
 |  |  |  |
Short Carriage
Wide | Long Carriage
Wide | Short Carriage
Narrow | Long Carriage
Narrow |
Carriage Dimensions AMS 4B W 20
Carriage Specifications AMS 4B W 20
| Parameter | AMS 4B W 20-A | AMS 4B W 20-B | AMS 4B W 20-C | AMS 4B W 20-D |
| System Height A (mm) | 30 | 30 | 30 | 30 |
| Housing Half Width, Opposite Side A1 (mm) | 23 | 23 | 23 | 23 |
| Housing Half Width, Reading Head Side A2 (mm) | 23 | 23 | 23 | 23 |
| Reading Head Projection A3 (mm) | 17.6 | 17.6 | 17.6 | 17.6 |
| Carriage Width B (mm) | 63 | 63 | 44 | 44 |
| Reference Surface Distance B2 (mm) | 21.5 | 21.5 | 12 | 12 |
| Front Center Lube Port C1 (mm) | 5.2 | 5.2 | 5.2 | 5.2 |
| Side Lube Port Position C3 (mm) | 4.6 | 4.6 | 4.6 | 4.6 |
| Side Lube Port Position (2nd) C4 (mm) | 10.75 | 18.75 | 12.75 | 13.75 |
| Top Lube Port Position C7 (mm) | 10.25 | 18.25 | 12.25 | 13.25 |
| Carriage Height J (mm) | 25.5 | 25.5 | 25.5 | 25.5 |
| Mounting Hole Pitch L1 (mm) | 40 | 40 | 36 | 50 |
| Mounting Hole Pitch L2 (mm) | 35 | 35 | — | — |
| Carriage Length incl. Housing L9 (mm) | 132.5 | 148.5 | 132.5 | 148.5 |
| Housing Length L11 (mm) | 72 | 72 | 72 | 72 |
| Total Length of Measuring Carriage L13 (mm) | 151.5 | 167.5 | 151.5 | 167.5 |
| Carriage Body Inner Length Lw (mm) | 49.5 | 65.5 | 49.5 | 65.5 |
| Lateral Mounting Hole Pitch N (mm) | 53 | 53 | 32 | 32 |
| Reference Surface Height O (mm) | 8 | 8 | 6 | 6 |
Load Ratings
| Parameter | AMS 4B W 20-A | AMS 4B W 20-B | AMS 4B W 20-C | AMS 4B W 20-D |
| Static Load Capacity C₀ (N) | 31400 | 41100 | 31400 | 41100 |
| Dynamic Load Capacity C₁₀₀ (N) | 14400 | 17400 | 14400 | 17400 |
| Static Cross Moment Capacity M₀Q (Nm) | 373 | 490 | 373 | 490 |
| Static Longitudinal Moment Capacity M₀L (Nm) | 292 | 495 | 292 | 495 |
| Dynamic Cross Moment Capacity MQ (Nm) | 171 | 206 | 171 | 206 |
| Dynamic Longitudinal Moment Capacity ML (Nm) | 134 | 208 | 134 | 208 |
| Carriage Weight (kg) | 1.0 | 1.2 | 0.9 | 1.0 |
Rigidity Curve and Load Directions AMS 4B W 20
Measuring System Specifications
| Measuring Principle | Magneto-resistive incremental encoding (magnetically hard periodic N-S scale) |
| Signal Period | 200 µm |
| Accuracy Class | ± 5 µm / 1000 mm; ± 2 µm / 40 mm |
| Periodic Deviation | ± 0.7 µm |
| Hysteresis | < 0.5 µm (digitally adjustable on AMSD) |
| Resolution | AMSA max. 0.0625 µm; AMSD 0.2 / 1.0 / 5.0 µm |
| Output Interface | AMSA: analogue 1 Vpp; AMSD: digital quadrature signal RS 422 (incl. reference and error signals) |
| Current Consumption | AMSA 40 mA; AMSD 110 mA |
| Maximum Speed | AMSA 5 m/s; AMSD 3 m/s (max. 1 m/s at 0.2 µm resolution) |
| Reference Marks | Every 50 mm, or distance-coded |
| Supply Voltage | 5 V ± 0.25 V |
| Operating Temperature | 0 °C ~ +70 °C |
| Protection Rating | IP68 |
Source: MONORAIL and AMS Product Catalogue §4.6 General technical data (p.39).
Order Code Examples
AMS 4B Rail Order Code
AMS 4B S 20-N-G1-KC-R1-800-25-25
AMS 4B Carriage Order Code (Analog Output)
AMSA 4B W 20-A-P1-G1-V0-R1-CN-S11-LV-TSU
AMS 4B Carriage Order Code (Digital Output)
AMSD 4B W 20-A-P1-G1-V0-R1-CN-S11-LV-TSD-050-80-ZN
Available Options
Based on the Available options icon bar in the catalogue.
Common to Rails and Carriages
Accuracy Classes
 | G0 | Highly accurate |
 | G1 | Very accurate |
 | G2 | Accurate |
 | G3 | Standard |
Coating
 | CN | None |
 | CH | Hard chromium |
Rails
Straightness
 | KC | Standard |
Reference Side
 | R11 | Ref. bottom, scale bottom |
 | R12 | Ref. bottom, scale top |
 | R21 | Ref. top, scale bottom |
 | R22 | Ref. top, scale top |
Magnetization
 | TR50 | Reference magnetization 50 mm |
 | TD20 | Distance-coded 20 mm |
 | TD50 | Distance-coded 50 mm |
Carriages
Preload Classes
 | V0 | Very low |
 | V1 | Low |
 | V2 | Medium |
 | V3 | High |
Reference Surface
 | R1 | Reference bottom (below or right) |
 | R2 | Reference top (top or left) |
Reading Head Position
 | P1 | Top right |
 | P3 | Bottom left |
Lubrication Ports
 | S10 | Left center |
 | S20 | Right center |
 | S11 | Top left |
 | S21 | Top right |
 | S12 | Lower left side |
 | S22 | Lower right side |
 | S13 | Upper left side |
 | S23 | Upper right side |
 | S32 | Left side (separate lubrication on both sides) |
 | S42 | Right side (separate lubrication on both sides) |
 | S49 | |
Lubrication as Delivered
 | LN | Oil protect |
 | LG | Grease protect |
 | LV | Full greasing |
Interface (Reading Head Cable Outlet)
 | TMU | analog, 0.3 m |
 | TRU | analog, 3 m |
 | TSU | analog, 3 m |
 | TMD | digital, 0.3 m |
 | TRD | digital, 3 m |
 | TSD | digital, 3 m |
