| PartNumber | PB-24Q | PB-24MD | PB-24HQ |
| Description | Relay Sockets & Hardware 6 I/O Max. Screw | I/O MODULE RACK 24 CHANNEL | Digital I/O Module Mounting Boards |
| Manufacturer | Crydom Co. | Crydom Co. | Crydom Co. |
| Product Category | I/O Relay Module Racks | I/O Relay Module Racks | I/O Relay Module Racks |
| Accessory Type | Mounting Board | - | - |
| Series | PB | PB | PB |
| Termination Style | Screw | - | - |
| Mounting Type | Standoffs | Standoffs | Standoffs |
| Style | Quad | Mini | Quad |
| Number of Channels | 24 | 24 | 24 |
| Connector Type | 50 pos Card Edge and Screw Terminal Blocks | 50 pos Card Edge and Screw Terminal Blocks | 50 pos Header and Screw Terminal Blocks |
| Number of Contacts | 24 | - | - |