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| PartNumber | EMS22D51-B28-LS5 | EMS22D31-B28-LS2 | EMS22D31-D28-LT2 |
| Description | Encoders Direction/Step Enco | Encoders Direction/Step Enco | Encoders Direction/Step Enco |
| Manufacturer | Bourns | Bourns | Bourns Inc. |
| Product Category | Encoders | Encoders | Encoders |
| RoHS | Y | Y | - |
| Series | EMS22D | EMS22D | EMS22D |
| Mounting Style | Panel Mount | Panel Mount | Panel |
| Product | Magnetic Encoders | Magnetic Encoders | Magnetic |
| Type | Direction/Step | Direction/Step | Incremental |
| Resolution | 512 PPR | 64 PPR | 64 PPR |
| Technology | Magnetic | Magnetic | Rotary |
| Number of Detents | No Detent | No Detent | No Detent |
| Number of Channels | 3 Channel | 3 Channel | 3 Channel |
| Termination Style | Through Hole | Through Hole | PC Pin |
| Output Type | Direction/Step | Direction/Step | Tachometer |
| Shaft Diameter | 1/4 in | 1/4 in | 1/8 in |
| Shaft Type | Round / Plain | Round / Plain | Round / Plain |
| With Switch | No Switch | No Switch | No Switch |
| Operating Supply Voltage | 5 VDC | 3 VDC | 3 VDC |
| Bushing Size | 3/8 in x 3/8 in | 3/8 in x 3/8 in | 3/8 in x 3/8 in |
| Size / Dimension | 21 mm x 16 mm | 21 mm x 16 mm | - |
| Brand | Bourns | Bourns | - |
| Bushing Material | Metal | Metal | Metal |
| Bushing Thread | 3/8-32 UNEF-2A | 3/8-32 UNEF-2A | 3/8-32 UNEF-2A |
| Maximum Operating Temperature | + 125 C | + 125 C | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Product Type | Encoders | Encoders | - |
| Shaft Length | 7/8 in | 7/8 in | 7/8 in |
| Factory Pack Quantity | 42 | 42 | - |
| Subcategory | Encoders | Encoders | - |
| Unit Weight | 0.388014 oz | 0.388014 oz | 0.388014 oz |
| Operating Temperature Range | - | - | - 40 C to + 125 C |
| Mounting Type | - | - | Panel Mount |
| Size Dimension | - | - | 21 mm x 16 mm |
| Voltage Supply | - | - | 3.3VDC |
| Actuator Type | - | - | 1/8" Dia Round End |
| Orientation | - | - | Vertical |
| Encoder Type | - | - | Magnetic |
| Pulses per Revolution | - | - | 64 |
| Detent | - | - | No |
| Built in Switch | - | - | - |
| Rotational Life Cycles Min | - | - | 50M |