| PartNumber | 70GRCK4-DIN | 70GRCK4R | 70GRCK4 |
| Description | I/O Modules I/O Rack, G5, 4 channel, negative true logic, DIN rail mount | I/O Modules I/O Rack, G5, 4 channel, positve or negative true logic | I/O Modules I/O Rack, G5, 4 channel, negative true logic |
| Manufacturer | Grayhill | Grayhill | Grayhill Inc. |
| Product Category | I/O Modules | I/O Modules | I/O Relay Module Racks |
| RoHS | E | E | - |
| Product Type | I/O Modules | I/O Modules | - |
| Series | G5 | G5 | System 50 |
| Brand | Grayhill | Grayhill | - |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | I/O Modules | I/O Modules | - |
| Tradename | System 50 | System 50 | - |
| Mounting Type | - | - | Standoffs |
| Style | - | - | G5 |
| Number of Channels | - | - | 4 |
| Connector Type | - | - | Screw Terminal Blocks |