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| Part Number | CJ1G-CPU42H | CJ1G-CPU43H | CJ1G-CPU44H | CJ1G-CPU45H | CJ1G-CPU42P |
| Manufacturer | Omron Automation and Safety | Omron Automation and Safety | Omron Automation and Safety | Omron Automation and Safety | Omron Automation and Safety |
| Series | CJ1 | CJ1 | CJ1 | CJ1 | CJ1 |
| Packaging | Bulk | Bulk | Bulk | Bulk | Bulk |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Number of Inputs and Type | - | - | - | - | - |
| Number of Outputs and Type | - | - | - | - | - |
| Expandable | 30 Modules (2 Racks) Max | 30 Modules (2 Racks) Max | 40 Modules (3 Racks) Max | 40 Modules (3 Racks) Max | 40 Modules (3 Racks) Max |
| Voltage - Supply | - | - | - | - | - |
| Display Type | No Display | No Display | No Display | No Display | No Display |
| Number of Characters Per Row | - | - | - | - | - |
| Communications | RS-232C | RS-232C | RS-232C | RS-232C | RS-232C |
| Memory Size | 64K Words | 64K Words | 64K Words | 128K Words | 64K Words |
| Mounting Type | DIN Rail | DIN Rail | DIN Rail | DIN Rail | DIN Rail |
| Features | Battery Backup | Battery Backup | Battery Backup | Battery Backup | Battery Backup |
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