Description
The Allen-Bradley 1783-CMS20DP is a 20-port industrial managed Ethernet switch from the Stratix 5200 hardware family. It is equipped with 18 dedicated 100/1000 Fast/Gigabit Ethernet copper ports and 2 dual-purpose Combo ports that can accommodate either RJ45 copper or SFP fiber transceivers. This switch utilizes the Cisco IOS-XE network operating system platform and features the “Full” firmware package level, natively supporting advanced Layer 2 and Layer 3 routing functionality alongside Device Level Ring (DLR) network topologies for critical automation architectures.
Technical Specifications
| Parameter | Value / Specification |
| Brand / Manufacturer | Allen-Bradley / Rockwell Automation |
| Model / Part Number | 1783-CMS20DP |
| Product Line | Stratix 5200 Ethernet Switches |
| Total Network Ports | 20 ports |
| Copper Port Configuration | 18 x 100/1000 Base-T RJ45 ports |
| Combo Port Configuration | 2 x Combo (100/1000 Base-T RJ45 or SFP transceivers) |
| Firmware License Level | Full Firmware Edition (Layer 3 Routing Enabled) |
| Resiliency Topologies | Device Level Ring (DLR – Master/Node), STP, RSTP, MSTP |
| Industrial Control Integration | EtherNet/IP explicit/implicit messaging, Studio 5000 Add-On Profiles (AOP) |
| Input Operating Voltage | Dual 12 to 48 V DC redundant power inputs |
| Operating Temperature | −40 to +70 °C (−40 to +158 °F) |
| Environmental Enclosure | IP30 open type |
Commercial and Availability Logistics
- Product Condition: New Original (New Surplus) in original factory-sealed packaging.
- Warranty: 12-month technical warranty covering physical component integrity and electrical performance.
- Availability: In stock. Standard handling and dispatch time is 1 to 3 business days for worldwide logistics channels.
- Pricing Notice: The listed price is indicative and fluctuates based on regional market demand and supplier inventory tiers. Contact our technical procurement group for a firm, written quote.
Engineering Considerations and Field Deployment Notes
EtherNet/IP and Studio 5000 Control Integration
Because the Stratix 5200 series integrates natively with Logix control platforms, the 1783-CMS20DP can be diagnosed directly inside Logix Designer using Custom Add-On Profiles (AOP). This integration enables system designers to map real-time switch analytics, port status bits, and security alarms into the controller’s tag database without building manual SNMP script parsers.
Device Level Ring (DLR) Implementation
The “DP” suffix code indicates native DLR implementation capabilities. When running the Full firmware stack, this module can act as either a DLR Ring Supervisor or a standard DLR Ring Node. In a standard ring configuration, a single cable break will heal the network routing within less than 3 ms for up to 50 nodes, preventing I/O dropouts on Logix chassis or variable frequency drives.
SFP Combo Port Operational Rules
The two integrated Combo ports can interface with either copper lines or SFP fiber optics. Note that if an SFP module is active in Port 19, the corresponding RJ45 Port 19 is disabled internally via the hardware multiplexer circuit. Ensure the SFP transceivers match the system wavelength requirements (850 nm for Multi-mode, 1310 nm for Single-mode) and match the Fast/Gigabit Ethernet speeds explicitly configured inside the switch port profile.
Frequently Asked Questions
What is the advantage of the Full firmware over the Base firmware variant?
The Full firmware version on the 1783-CMS20DP enables Layer 3 features, such as inter-VLAN routing, static routing protocols, Access Control Lists (ACLs) enforced at the hardware level, and more robust advanced management security layers that are missing or disabled in the Base firmware edition.
Can I hot-swap SFP transceivers on the Combo ports while the switch is running?
Yes, the SFP interface slots support hot-swapping under power. However, to prevent data frame drops, ensure that any automation control traffic is safely diverted through redundant paths (such as an active DLR configuration) before removing a live transceiver element.
How do I factory-reset the configuration if the password is lost?
The physical chassis features a dedicated Express Setup / Reset button behind the lower protective access cover. Pressing and holding the button for more than 15 seconds will trigger an internal flash clear, purging existing configurations and resetting the hardware to its default DHCP client address state.
Technical Notice: Confirm network architecture parameters, broadcast storm protection variables, and firmware revision steps using the official Rockwell Automation Stratix 5200 user manual and release notes before inserting this switch into a live production line.
