The Allen Bradley 1756-L73EROM is an Armor GuardLogix 5570 Controller. It supports the same global certifications and environmental ratings as the ControlLogix and GuardLogix controllers while providing an additional IP67 (Ingress Protection) and a UL Type 4/4x rated enclosure for dust and washdown protection. It includes 2 independent EtherNet/IP and DLR (Device Level Ring) capable network channels, providing quick recovery from the loss of network connections if one connection fails. It provides easy access to the controller mode switch, USB port, Secure Digital (SD) card slot, and the power supply switch.
The 1756-L73EROM controller has 8MB of user memory and 0.98MB of I/O memory. It can support a maximum of 128,000 digital I/O and 4000 analog I/O. It has a dimension of 9.4 x 11.5 x 6.5 in. and weighs 15.50 lbs. It has a nominal input voltage of 24V DC with pass-through powering other On-Machine products. It has 4 M12 Category 5E Ethernet ports and a USB 1.1, full-speed (12Mbps) USB port. It can be installed in any slot of a ControlLogix 1756 Chassis and multiple controllers can also be installed in the same chassis. For standard communication, it uses EtherNet/IP networks with 256 EtherNet/IP and 128 TCP connections.
The 1756-L73EROM controller simplifies wiring and reduces cabinet hardware thus eliminating the need for special tools or personnel for component replacement. A 1 GB (1784-SD1) Secure Digital card comes pre-installed as an optional non-volatile storage which can be expanded up to 2 GB (1784-SD2). It also has new lensing for better status indication, display readability, and simplifying troubleshooting.
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| Manufacturer | Rockwell Automation |
| Brand | Allen Bradley |
| Part Number/Catalog No. | 1756-L73EROM |
| Series | ControlLogix |
| Module Type | Armor GuardLogix Controller |
| Standard Memory | 8 Megabytes |
| I/O Memory | 0.98 Megabytes |
| Max Total I/O | 128,000 |
| Max Analog I/O | 4000 |
| Max Digital I/O | 128,000 |
| Ethernet Ports | 4 Ethernet M12 Category 5E |
| USB Ports | USB 1.1 Full Speed (12 Mbps) |
| Nom Input Voltage | 24 Volts DC |
| Input Voltage Range | 18-32 Volts DC |
| Enclosure Type | UL Type 4/4x |