GuardLogix® system use a common control 
engine with a common development environment to provide high performance in an easy-to-use environment. Tight integration between the programming software, controller, and I/O modules reduces development time and cost at commissioning and during normal operation. You can perform standard and safety control in the same chassis for a truly integrated system. Leverage the high-availability and extreme environment capabilities to meet your application needs.
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PLC-5 Control System
Bulletin 1785 PLC-5® programmable logic 
controllers (PLCs) offer flexibility in programming, network, and I/O Designed for larger sequential and regulatory control applications with specialized I/O requirements, PLC-5 control systems bring together existing and new system through networks such as EtherNet/IP™, ControlNet™, and DeviceNet™. Embedded network ports in PLC-5 controllers enable connectivity to a wide range of devices including MicroLogix™, SLC™ 500, CompactLogix™, and ControlLogix® controllers, letting you expand your control system without additional training investments
PLC-5 Controllers
Bulletin 1785 PLC-5® controllers are available in a range of I/O capacity and memory sizes. Our controllers have on-board Universal Remote I/O scanner ports and optional communication modules. You can connect our controllers in a variety of networks for distributed processing and I/O control. Selected models of PLC-5 controllers have on-board ports for Ethernet™, ControlNet™, or Extended Local I/O communication.
PLC-5 Communications
Bulletin 1771 PLC-5® Communication Modules let you add another communication port to the PLC-5 controller. This adds network capability beyond the available on-board ports.
Universal I/O
Bulletin 1771 Universal I/O provides a full range of digital, analog, and specialty I/O for a wide variety of applications. Use Universal I/O modules in a local I/O chassis of a PLC-5® system. Or, use an I/O communication adapter module to place I/O in a chassis at a location remote from the controller.
PLC-5 Power Supplies
Bulletin 1771 PLC-5® power supplies provide 5V DC to power installed controllers or communication adapters and I/O modules in a 1771 chassis. Both chassis-based and stand-alone power supplies are available. They support a range of AC and DC input voltages.
PLC-5 Chassis
The PLC-5 system requires a 1771 chassis to contain the various modules. Chassis are available in sizes up to 16-slots to fit your application requirements. The backplane provides a communication path between the I/O modules and either the processor module or the I/O adapter module.
Features
- Reliability with a Mean Time Between Failure (MTBF) rating that exceeds 400,000 hours
- 6 K words through 100 K words user memory
Backup options:
- ControlNet™ Hot Backup module provides control of outputs if the primary controller shuts down
- PLC-5® Backup Communication module helps increase the fault tolerance of systems controlling I/O on a remote I/O link
I/O support:
- Monitor and control I/O across ControlNet, DeviceNet™, and Universal Remote I/O links
- Forcible I/O ranges from 512 through 3072 I/O
- Maximum remote I/O locations ranges from 5 through 125
Communication ports:
- On-board ports for DH+, Universal Remote I/O, and RS-232-C/RS-422-A/RS-423-A communication
- Ethernet or ControlNet dual-media ports included on some controllers
- Separate modules provide additional communication ports
Products
- 1785 PLC-5 Controllers
- 1771 Communication Modules
- 1771 Universal I/O Modules
- 1771 Power Supplies
- 1771 Chassis
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- Siemens
Siemens offers a wide range of Programmable Logic Controllers (PLC). S7-1200 PLC is suitable for small individual machine applications, whereas S7-300 PLC was previously targeted towards medium to high demand applications. However since it is nearing its end-of-lifecycle, S7-300/400 PLC series have been supplemented with the innovative S7-1500 PLC series. A new range of HMI panels are also available in all sizes for suitable operator control/monitoring. S7-1200 and S7-1500 are both part of Totally Integrated Automation (TIA) platform and programmable via Siemens TIA Portal software.
