Introduction
The Sensata BEI Sensors H20 Series 2″ Solid Shaft Incremental Encoders – Ordinary & Hazardous Locations are a compact encoder designed to economically fill the resolution range up to 10,000 cycles per turn. This compact unit features a precision disc, precision ball bearings, and EMI shielding. The H20 encoder meets IP66 sealing requirements when ordered with the shaft seal and one of the available connectors.
Features
- Compact size to fit in tight installations
- Well-sealed for dusty and wet environments
- Shielded against EMI
- Reverse voltage protection
- Overvoltage protection
- Output protection diode
- Any resolution from 1 to 10,000 is available
- Hazardous Location certifications: Intrinsically Safe UL/ATEX/IECEx
Applications
- Machine control
- Process control and automation
- Agricultural machinery
- Robotics
- Food processing
- Metering operations
Mechanical Specifications
| Material | Cover: Die-cast aluminum with Iridite finish
Body: Aluminum Shaft: AISI 303 Stainless Steel |
| Bearings | High precision ball bearings; Material: Chrome steel. Shielded bearings standard, sealed bearings optional. |
| Maximum Loads | Axial: 40 pounds
Radial: 35 pounds |
| Shaft Inertia | 4.1 × 10⁻⁴ oz-in-sec² |
| Torque | 1.0 in-oz (max) without shaft seal
2.5 in-oz (max) with shaft seal |
| Permissible Max. Speed | 10,000 RPM |
| Continuous Max. Speed | 6,000 RPM |
| Encoder Weight (Approx.) | 9 oz typical |
| Theoretical Mechanical Lifetime (Faxial / Fradial) | 2 × 10⁸ revs (1,300 hrs at 2,500 RPM) at rated load
1 × 10¹⁰ revs (67,000 hrs at 2,500 RPM) at 10% of rated load |
Electrical Specifications
All variants: Supply Current (no load) < 75 mA | Current per Channel < 40 mA | Short Circuit Proof: Yes | Reverse Polarity Tolerant: Yes
| Location / Certification | Electronic | Output Signals | Operating Voltage (+V) | Overvoltage Protection | Frequency Capability | Resolutions Category | Temp Range (Low) | Temp Range (High) |
| Ordinary + Non-Incendive Ex ec IIC T4/T3 Gc | 28/V | HTL | 4.75–30V | Up to 33V | Up to 1 MHz | Std / Low / High | -40°C | +100°C / +80°C |
| 28/O | Open Collector | 4.75–30V | Up to 33V | Up to 300 kHz | Std / Low / High | -40°C | +100°C / +80°C | |
| 28/5 | TTL | 4.75–30V | Up to 33V | Up to 1 MHz | Std / Low / High | -40°C | +100°C / +80°C | |
| Intrinsically Safe Ex ia IIC | 5/V | TTL | 4.5–6V | Up to 6.8V | Up to 1 MHz | Std / Low / High | -40°C | +80°C |
| 5/O | Open Collector | 4.5–6V | Up to 6.8V | Up to 300 kHz | Std / Low / High | -40°C | +80°C | |
| Intrinsically Safe Ex ia IIB | 9/V | HTL | 8–12V | Up to 16V | Up to 1 MHz | Std / Low / High | -40°C | +80°C |
| 9/O | Open Collector | 8–12V | Up to 16V | Up to 300 kHz | Std / Low / High | -40°C | +80°C |
Notes:
(1) See the resolutions section for details. (2) Surface encoder temperature. (3) UL Listed: -20°C to +80°C; device must be supplied by a Class 2, LPS, or SELV limited energy source 250 mA.
(4) Complementary outputs recommended for use with line driver type (source/sink) outputs — provides a high degree of noise immunity when used with differential receivers.
(5) Output ICs available as Line Driver or NPN Open Collector. Open Collectors require external pull-up resistors. Line Driver style is generally recommended for better noise immunity and faster switching times. Do NOT connect line driver outputs permanently to 0V, +V, or any other signal. Unused outputs should be isolated and left floating.
(6) NPN Open Collector also available with internal 2.7K ohm pull-up resistors: 5/OR or 9/OR. IS encoders must be installed per Control Drawing 08292-001.
Environmental Specifications
| Shocks (EN 60068-2-27) | ≤ 1,000 m.s⁻² (during 5 ms) |
| Vibrations (EN 60068-2-6) | ≤ 300 m.s⁻² (50 … 2,000 Hz) |
| EMC | EN 61000-6-2, EN 61000-6-4 |
| Isolation | 1,000 V eff |
| Operating Temperature | See Electrical table above |
| Storage Temperature | -40°C … +100°C |
| Protection (EN 60529) | IP 65 standard
IP 66 when ordered with shaft seal (units with MS connector) or cable gland (units with cable termination) |
| Humidity | 93% RH non-condensing at 20°C |
Order Options
Find More Drawings & Technical Specifications for BEI H20 … Click Here
