| PartNumber | 70RCK16-HL | 70RCK24 | 70RCK16 |
| Description | I/O Modules I/O Rack, Standard, 16 channel, 50-pin header with ejector levers | I/O Modules I/O Rack, Standard, 24 channel, card edge | I/O Modules I/O Rack Standard 16 channel card edge |
| Manufacturer | Grayhill | Grayhill Inc. | Grayhill Inc. |
| Product Category | I/O Modules | I/O Relay Module Racks | I/O Relay Module Racks |
| RoHS | E | - | - |
| Product Type | I/O Modules | - | - |
| Packaging | Bulk | - | - |
| Series | Standard | System 50 | System 50 |
| Brand | Grayhill | - | - |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | I/O Modules | - | - |
| Tradename | System 50 | - | - |
| Mounting Type | - | Standoffs | Standoffs |
| Style | - | Standard | Standard |
| Number of Channels | - | 24 | 16 |
| Connector Type | - | 50 pos Card Edge and Screw Terminal Blocks | 50 pos Card Edge and Screw Terminal Blocks |