SR-MW/ERT weatherproof end-of-shaft slip rings with encoder, 50.8 mm rotor
Weatherproof ten-circuit end-of-shaft slip ring with a 50.8 mm (2 in) rotor and a built-in optical encoder, for low-level signals: strain gages, thermocouples, accelerometers and low voltages.
Weatherproof 20-circuit end-of-shaft slip ring with a 50.8 mm (2 in) rotor and a built-in optical encoder, for low-level signals: strain gages, thermocouples, accelerometers and low voltages.
Weatherproof 36-circuit end-of-shaft slip ring with a 50.8 mm (2 in) rotor and a built-in optical encoder, for low-level signals: strain gages, thermocouples, accelerometers and low voltages.
- 10
- Circuits
- 2 000 rpm
- Max speed
- 50.8 mm
- Rotor diameter
- 512 ppr
- Encoder
- 20
- Circuits
- 2 000 rpm
- Max speed
- 50.8 mm
- Rotor diameter
- 512 ppr
- Encoder
- 93 mm · 369 g
- Length · weight
- 36
- Circuits
- 2 000 rpm
- Max speed
- 50.8 mm
- Rotor diameter
- 512 ppr
- Encoder
- 115 mm · 369 g
- Length · weight
- Max current per circuit500 mA
- Max current per circuit500 mA
- Length93 mm
- Max current per circuit500 mA
- Length115 mm
SR10MW/E512/X: weatherproof ten-circuit end-of-shaft slip ring and encoder, 50.8 mm rotor
This end-of-shaft slip ring has ten gold alloy rings rated at 0.5 A, which carry strain gages, thermocouples, accelerometers and low voltages with a peak resistance variation of 0.1 Ω. Its optical encoder, of 256, 360, 500 or 512 pulses per revolution according to the model, measures speed, angle and direction of rotation without using any ring. Contacting rotary seals make it completely weatherproof. Its stainless steel rotor has a 50.8 mm (2 in) flange with color-coded solder terminals, and its anodized aluminum stator a radial circular connector. It runs up to 2 000 rpm, from −40 to 85 °C.
On installation, the rotor flange is screwed to the end of the shaft. Connector plugs are sealed at the rear with RTV silicone or a sealing backshell, whose tube can hold the stator against a wheel-well bracket. The encoder runs on 5 to 20 V DC, 100 mA, and gives A and B quadrature, index and A⊕B pulses of 0 to 5 V, with a maximum cumulative error of 0.25°. As an option, built-in electronics add tachometer outputs (T), a velocity voltage up to ±10 V and a position voltage up to +10 V, on 8 to 18 V DC.
It is used in wet-weather applications such as automotive wheels, which mostly stay within 2 000 rpm; on torque wheels, the tachometer outputs are normally set to 10 V at 1 000 or 1 800 rpm.
SR20MW/E512/X: weatherproof 20-circuit end-of-shaft slip ring and encoder, 50.8 mm rotor
This end-of-shaft slip ring has 20 gold alloy rings rated at 0.5 A, which carry strain gages, thermocouples, accelerometers and low voltages with a peak resistance variation of 0.1 Ω. Its optical encoder, of 256, 360, 500 or 512 pulses per revolution according to the model, measures speed, angle and direction of rotation without using any ring. Contacting rotary seals make it completely weatherproof. Its stainless steel rotor has a 50.8 mm (2 in) flange with color-coded solder terminals, and its anodized aluminum stator a radial Bendix PT02E-16-26P connector. It is 93 mm long, weighs 369 g and runs up to 2 000 rpm, from −40 to 85 °C.
On installation, the rotor flange is screwed to the end of the shaft with three 8-32 screws on a 43.18 mm (1.700 in) circle, and the sensor wires are soldered to the rotor terminals. Connector plugs are sealed at the rear with RTV silicone or a sealing backshell, whose tube can hold the stator against a wheel-well bracket. The encoder runs on 5 to 20 V DC, 100 mA, and gives A and B quadrature, index and A⊕B pulses of 0 to 5 V, with a maximum cumulative error of 0.25°. As an option, built-in electronics add tachometer outputs (T), a velocity voltage up to ±10 V and a position voltage up to +10 V, on 8 to 18 V DC.
It is used in wet-weather applications such as automotive wheels, which mostly stay within 2 000 rpm; with tachometer outputs, its analog signals are easier to record than encoder pulses.
SR36MW/E512/X: weatherproof 36-circuit end-of-shaft slip ring and encoder, 50.8 mm rotor
This end-of-shaft slip ring has 36 gold alloy rings rated at 0.5 A, which carry strain gages, thermocouples, accelerometers and low voltages with a peak resistance variation of 0.1 Ω. Its optical encoder, of 256, 360, 500 or 512 pulses per revolution according to the model, measures speed, angle and direction of rotation without using any ring. Contacting rotary seals make it completely weatherproof. Its stainless steel rotor has a 50.8 mm (2 in) flange with color-coded solder terminals, and its anodized aluminum stator a radial Bendix JT02RE-16-35P connector. It is 115 mm long, weighs 369 g and runs up to 2 000 rpm, from −40 to 85 °C.
On installation, the rotor flange is screwed to the end of the shaft with three 8-32 screws on a 43.18 mm (1.700 in) circle, and the sensor wires are soldered to the rotor terminals. Connector plugs are sealed at the rear with RTV silicone or a sealing backshell, whose tube can hold the stator against a wheel-well bracket. The encoder runs on 5 to 20 V DC, 100 mA, and gives A and B quadrature, index and A⊕B pulses of 0 to 5 V, with a maximum cumulative error of 0.25°. As an option, built-in electronics add either tachometer outputs (T), a velocity voltage up to ±10 V and a position voltage up to +10 V, on 8 to 18 V DC, or, with the 360 ppr encoder, resolver outputs (R), sine and cosine up to ±10 V.
It is used in wet-weather applications such as automotive wheels, which mostly stay within 2 000 rpm; with tachometer or resolver outputs, its analog signals are easier to record than encoder pulses.
Specifications
| Angle accuracy | ≤ 0.25° (maximum cumulative error) |
|---|---|
| Circuits | 10 |
| Rotation sensor | Encoder |
| Encoder resolution | 512 ppr |
| Encoder electronics | None |
| Embedded amplifier | None |
| Max peak contact noise | ≤ 100 mΩ |
| Encoder signals | A · B · Index · A⊕B (A and B in quadrature, 1 ppr index, 0 to 5 V) |
| Current per circuit | 500 mA |
| Supply voltage | 5 to 20 V (encoder) |
| Supply current | 100 mA (encoder) |
| Mounting | End of shaft |
| Max speed | 2 000 rpm |
| Running torque | 0.148 N·m (21 in-oz with seals) |
| Rotor diameter | 50.8 mm |
| Seals | Contacting rotary seals (W) |
| Operating temperature | −40 to 85 °C |
| Protection | Weatherproof |
| Connections | Connector · Solder terminals (stator: radial Bendix PT circular connector; rotor: solder terminals) |
| Angle accuracy | ≤ 0.25° (maximum cumulative error) |
|---|---|
| Circuits | 20 |
| Rotation sensor | Encoder |
| Encoder resolution | 512 ppr |
| Encoder electronics | None |
| Embedded amplifier | None |
| Max peak contact noise | ≤ 100 mΩ |
| Encoder signals | A · B · Index · A⊕B (A and B in quadrature, 1 ppr index, 0 to 5 V) |
| Current per circuit | 500 mA |
| Supply voltage | 5 to 20 V (encoder) |
| Supply current | 100 mA (encoder) |
| Mounting | End of shaft |
| Max speed | 2 000 rpm |
| Running torque | 0.148 N·m (21 in-oz with seals) |
| Rotor diameter | 50.8 mm |
| Seals | Contacting rotary seals (W) |
| Dimensions | length 93 mm (without mating connectors) |
| Weight | 369 g (without mating connectors) |
| Operating temperature | −40 to 85 °C |
| Protection | Weatherproof |
| Connections | Connector · Solder terminals (stator: radial Bendix PT circular connector; rotor: solder terminals) |
| Angle accuracy | ≤ 0.25° (maximum cumulative error) |
|---|---|
| Circuits | 36 |
| Rotation sensor | Encoder |
| Encoder resolution | 512 ppr |
| Encoder electronics | None |
| Embedded amplifier | None |
| Max peak contact noise | ≤ 100 mΩ |
| Encoder signals | A · B · Index · A⊕B (A and B in quadrature, 1 ppr index, 0 to 5 V) |
| Current per circuit | 500 mA |
| Supply voltage | 5 to 20 V (encoder) |
| Supply current | 100 mA (encoder) |
| Mounting | End of shaft |
| Max speed | 2 000 rpm |
| Running torque | 0.148 N·m (21 in-oz with seals) |
| Rotor diameter | 50.8 mm |
| Seals | Contacting rotary seals (W) |
| Dimensions | length 115 mm (without mating connectors) |
| Weight | 369 g (without mating connectors) |
| Operating temperature | −40 to 85 °C |
| Protection | Weatherproof |
| Connections | Connector · Solder terminals (stator: radial Bendix JT circular connector; rotor: solder terminals) |
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The stator always has a radial circular connector (X).
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None for SR10MW/E512/X.
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