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CompactLogix 5370 and Compact GuardLogix 5370 controllers (1769-L1/L2/L3)
15 Allen-Bradley CompactLogix 5370 (1769-L) catalog numbers, each with the ratings and the lifecycle status shown on its Rockwell product page (read on 3 November 2026). TDL quotes these parts as spares or as part of a project, and handles configuration, programming and commissioning on site.
- CompactLogix 5370 L1 controllers (1769-L16ER/L18ER/L19ER-BB1B) run on 24 V DC only, have 16 embedded DC inputs and 16 DC outputs, and expand with POINT I/O modules.
- CompactLogix 5370 L2 controllers (QBFC1B) combine embedded digital I/O, analog I/O and four high-speed counters with up to four 1769 expansion modules.
- CompactLogix 5370 L3 controllers have dual Ethernet ports with DLR capability and ship with a 1 GB SD card.
- Rockwell lists the Compact GuardLogix 5370 controllers 1769-L30ERMS, L33ERMS and L36ERMS as End of Life (discontinued December 31, 2026), with Compact GuardLogix 5380 ERMS3 models as engineering replacements.
How to read the catalog number
- M = integrated CIP motion; S = Compact GuardLogix safety controller; -BB1B = 16 DC inputs / 16 DC outputs embedded; -QBFC1B = embedded digital, analog and high-speed counter I/O.
Catalog numbers 15 catalog numbers
Tap a catalog number to send a quote request for it.
| Catalog number | Rockwell description | Memory | Ports | I/O, nodes | Motion axes | Type | Lifecycle (Rockwell) |
|---|---|---|---|---|---|---|---|
| 1769-L16ER-BB1B | CompactLogix L16 384KB Ctlr | 384 KB | 2 Ethernet ports (DLR) | Embedded 16 DC inputs (sink) / 16 DC outputs (source); up to 6 expansion modules (POINT Bus); up to 4 EtherNet/IP nodes | — | standard | Active |
| 1769-L18ER-BB1B | CompactLogix L18 512KB Ctlr | 512 KB | 2 Ethernet ports (DLR) | Embedded 16 DC inputs (sink) / 16 DC outputs (source); up to 8 expansion modules (POINT Bus); up to 8 EtherNet/IP nodes | — | standard | Active |
| 1769-L18ERM-BB1B | CompactLogix L18 512KB Ctlr-Motion | 512 KB | 2 Ethernet ports (DLR) | Embedded 16 DC inputs (sink) / 16 DC outputs (source); up to 8 expansion modules (POINT Bus); up to 8 EtherNet/IP nodes | 2 | standard | Active |
| 1769-L19ER-BB1B | CompactLogix L19 1MB Ctlr | 1 MB | 2 Ethernet ports (DLR) | Embedded 16 DC inputs (sink) / 16 DC outputs (source); up to 8 expansion modules (POINT Bus); up to 8 EtherNet/IP nodes | — | standard | Active |
| 1769-L24ER-QBFC1B | CompactLogix 750KB DI/O AI/O Controller | 750 KB | 2 EtherNet/IP ports (device-level ring) + 1 USB port | Embedded 16 DC in, 16 DC out, 4 universal analog in, 2 analog out, 4 high-speed counters; up to 4 1769 expansion modules; 8 EtherNet/IP connections, 120 TCP connections | — | standard | Active Mature |
| 1769-L27ERM-QBFC1B | CompactLogix 1MB DI/O AI/O Controller | 1 MB | 2 EtherNet/IP ports (device-level ring) + 1 USB port | Embedded 16 DC in, 16 DC out, 4 universal analog in, 2 analog out, 4 high-speed counters; up to 4 1769 expansion modules; 16 EtherNet/IP connections, 120 TCP connections | 4 | standard | Active Mature |
| 1769-L30ERM | CompactLogix 1 MB Motion Controller | 1 MB | Dual Ethernet w/DLR capability | 8 I/O Expansion; 16 EtherNet/IP nodes | 4 | standard | Active Mature |
| 1769-L33ERM | CompactLogix 2 MB Motion Controller | 2 MB | Dual Ethernet w/DLR capability | 16 I/O Expansion; 32 EtherNet/IP nodes | 8 | standard | Active Mature |
| 1769-L36ERM | CompactLogix 3 MB Motion Controller | 3 MB | Dual Ethernet w/DLR capability | 30 I/O Expansion; 48 EtherNet/IP nodes | 16 | standard | Active Mature |
| 1769-L30ERMS | Compact GuardLogix CPU, L30ERMS, 1M/0.5M | 1 MB standard + 0.5 MB safety | Dual Ethernet w/DLR capability | 8 I/O Expansion; 16 EtherNet/IP nodes | 4 | safety | End of Life – discontinued 31/12/2026 → 5069-L310ERMS3 |
| 1769-L33ERMS | Compact GuardLogix CPU, L33ERMS, 2M/1M | 2 MB standard + 1 MB safety | Dual Ethernet w/DLR capability | 16 I/O Expansion; 32 EtherNet/IP nodes | 8 | safety | End of Life – discontinued 31/12/2026 → 5069-L320ERMS3 |
| 1769-L36ERMS | Compact GuardLogix CPU, L36ERMS, 3M/1.5M | 3 MB standard + 1.5 MB safety | Dual Ethernet w/DLR capability | 30 I/O Expansion; 48 EtherNet/IP nodes | 16 | safety | End of Life – discontinued 31/12/2026 → 5069-L330ERMS3 |
| 1769-L24ER-QB1B | CompactLogix 5370 L2 Controller, 2 EtherNet/IP ports with Device Level Ring Capability, 750KB Memory, 16 DC Inputs, 16 DC Outputs, Up To 4 1769 I/O Expansion Modules, 8 EtherNet/IP and 120 TCP Connections, 24V DC Input Embedded Power Supply, With 1GB SD Card, Can Support Up To 2GB SD Card, 1 USB Port | — | — | — | — | — | Active Mature |
| 1769-L30ER | CompactLogix 5370 L3 Controllers, Dual Ethernet w/DLR capability, 1MB Memory, 8 I/O Expansion, 16 Ethernet IP Nodes. Controllers are shipped with 1GB SD card and can support up to 2GB SD card | — | — | — | — | — | Active Mature |
| 1769-L33ER | CompactLogix 5370 L3 Controllers, Dual Ethernet w/DLR capability, 2MB memory, 16 I/O Expansion, 32 Ethernet IP Nodes. Controllers are shipped with 1GB SD card and can support up to 2GB SD card | — | — | — | — | — | Active Mature |
Lifecycle status changes over time: confirm the current status on the Rockwell product page or in the Product Compatibility and Download Center before ordering.
Current replacement parts End-of-life lookup CompactLogix in TDL Projects
Sources
- Rockwell Automation product page of each catalog number in the tables, read on 3 November 2026.
- product pages 1769-L16ER-BB1B, 1769-L18ER-BB1B, 1769-L19ER-BB1B
- product pages 1769-L24ER-QBFC1B, 1769-L27ERM-QBFC1B
- product pages 1769-L33ERM, 1769-L36ERM
- product pages 1769-L30ERMS, 1769-L33ERMS, 1769-L36ERMS
- product pages 1769-L18ERM-BB1B, 1769-L27ERM-QBFC1B, 1769-L30ERMS