EM2 Transmissive Optical Encoder Module

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EM2 Transmissive Optical Encoder Module

The EM2 is a transmissive optical encoder module designed to offer 2x or 4x higher resolution than the EM1 encoder module. This module is designed to detect rotary position when used with a US Digital encoder disk. The EM2 consists of a lensed LED source and a monolithic detector IC enclosed in a small polymer package that is identical to the EM1. The EM2 uses phased array detector technology to provide superior performance and greater tolerances over traditional aperture mask type encoders.   The EM2 provides digital A & B quadrature outputs with a third output index channel. Each EM2 module is resolution specific and is matched to the resolution of a encoder disk. The EM2 operates with a single 5V supply and provides single ended outputs which are capable of both sinking and sourcing 5mA. An internal 0.1 uF decoupling capacitor is designed into the EM2 to provide enhanced noise immunity.For open collector and higher voltage applications, add the PC3 cable driver, or for differential cable driver outputs, add the PC4 cable driver. Encoder disks, quadrature decoder chips, counter chips, computer interface boards, mating connectors and cables are also available.Download the EM2/EM1 comparison chart. Two channel quadrature with index High resolution version of EM1 Single 5V supply Rotary versions up to 10,000 CPR Linear versions up to 2,000 CPI Internal decoupling capacitor Outputs source/sink 5 mA

Part Number em2_transmissive_optica
Company US Digital
Disk Radial Position Tolerance ± 5
Disk RPM 0 to 43.2*106/CPR
Electrostatic Discharge, kV ± 4
Linear Strip Speed, in./sec. 0 to 360
Output Current Per Channel, mA -5 to 5
Output Fall Time, nS 50
Output Rise Time, nS 50
Supply Voltage, V 4.5 to 5.5
A/B Output Frequency, kHZ 0 to 720
High-level Output, V 3.5
Low-level Output, V 0.25
Operating Temperature, C -25 to 100

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