Technical Data · Publication 1769-TD005 · Rockwell Automation
CompactLogix Controllers Specifications — Bulletins 1769 and 1768
Complete specifications, ratings, and catalog data for the Allen-Bradley CompactLogix 5370 L1/L2/L3 controllers, Compact GuardLogix 5370 SIL 3 controllers, Armor CompactLogix and Armor Compact GuardLogix, 1769 Packaged and Modular CompactLogix, 1768 CompactLogix controllers, and the 1784-series memory cards. Covers user memory, EtherNet/IP node capacity, Integrated Motion axes, environmental ratings, and agency certifications.
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Specifications
Performance & Memory
| User memory (1769-L16ER-BB1B) | 384 KB |
|---|---|
| User memory (1769-L18ER/L18ERM) | 512 KB |
| User memory (1769-L19ER) | 1 MB |
| User memory (1769-L24ER-QB1B) | 750 KB (1 MB on -QBFC1B/-QBFC1BK) |
| User memory (1769-L27ERM-QBFC1B) | 750 KB |
| User memory (L30ER family) | 1 MB |
| User memory (L33ER family) | 2 MB |
| User memory (L36ERM) | 3 MB |
| User memory (L37ERM / L38ERM) | 4 MB / 5 MB (standard) |
| Safety memory (Compact GuardLogix -S) | 0.5 – 1.5 MB (added to standard) |
| Controller tasks | 32 continuous, 100 programs per task |
| Programming languages | Relay ladder, Structured Text, Function Block, SFC |
| Nonvolatile memory | 1784-SD1 (1 GB) or 1784-SD2 (2 GB, ships with controller) |
Communication
| Ethernet ports | Two ports, single IP (embedded switch) |
|---|---|
| Protocol | EtherNet/IP; DeviceNet via 1769-SDN scanner |
| EtherNet/IP nodes, max (L16ER) | 4 nodes |
| EtherNet/IP nodes, max (L18ER / L19ER) | 8 nodes |
| EtherNet/IP nodes, max (L24ER) | 8 nodes |
| EtherNet/IP nodes, max (L27ERM) | 16 nodes |
| EtherNet/IP nodes, max (L30 family) | 16 nodes |
| EtherNet/IP nodes, max (L33 family) | 32 nodes |
| EtherNet/IP nodes, max (L36ERM) | 48 nodes |
| EtherNet/IP nodes, max (L37ERM) | 64 nodes |
| EtherNet/IP nodes, max (L38ERM) | 80 nodes |
| Controller connections | 256 |
| Socket interfaces, max | 32 |
| USB port | One, temporary programming connection only |
| Integrated Motion axes, max | 1–2 (L18ERM) · 4 (L27/L30ERM) · 8 (L33ERM) · 16 (L36/L37/L38ERM) |
Power & Current
| L1 controller power (5V DC) | 1 A (backplane/field combined draw) |
|---|---|
| L1 field power (24V DC) | 3 A combined, 5 mA input / 500 mA output |
| L2 controller power (5V DC) | 1 A (1.54 A on -QBFC1B/-QBFC1BK) |
| L2 controller power (24V DC) | 0.8 A (0.95 A on -QBFC1B/-QBFC1BK) |
| L3 controller power (5V DC) | 500 mA (850 mA on L30ERMS/L33ERMS/etc.) |
| L3 controller power (24V DC) | 225 mA (700 mA on -S safety variants) |
| Power dissipation, max | 4.5 W (L3) · 6.5 W (L3 safety) · 11.5 W (L1) · 12–21 W (L2) |
| Embedded power supply (L2) | 24V DC input, isolated (19.2–31.2V DC) |
| L3 compatible power supplies | 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4 |
| Isolation voltage | 50V (L1/L3) · 30V (L2) continuous, tested 500V AC 60 s |
| Short-circuit protection | Internal fuse, non-replaceable |
Environmental
| Operating temperature (L1/L2) | -20 to +60°C (-4 to +140°F), IEC 60068-2 |
|---|---|
| Operating temperature (L3/Packaged) | 0 to +60°C (+32 to +140°F) |
| Storage temperature | -40 to +85°C (-40 to +185°F) |
| Surrounding air, max | 60°C (140°F) |
| Relative humidity | 5–95% non-condensing (IEC 60068-2-30) |
| Vibration | 2 g @ 10–500 Hz (L1/L2) · 5 g @ 10–500 Hz (L3) |
| Shock, operating | 30 g (L1/L2) · 20 g DIN / 30 g panel (L3) |
| Shock, non-operating | 50 g (L1/L2) · 30 g DIN / 40 g panel (L3) |
| ESD immunity | 6 kV contact / 8 kV air (L1/L2); 4 kV / 8 kV (L3) |
| Radiated RF immunity | 10 V/m, 80–6000 MHz, 1 kHz sine 80% AM |
| Enclosure type | None (open-style) |
Physical
| Module location | DIN rail (L1); DIN rail or panel (L2/L3) |
|---|---|
| Weight (L1: L16/L18/L19) | 0.66 kg (1.5 lb) |
| Weight (L2: L24ER-QB1B) | 0.63 kg (1.39 lb) |
| Weight (L2: -QBFC1B / -QBFC1BK / L27ERM) | 0.9 kg (1.98 lb) |
| Weight (L3 standard) | 0.31 kg (0.68 lb) |
| Weight (L3 safety -S) | 0.54 kg (1.18 lb) |
| Module width (L1) | 100.00 mm (3.94 in) |
| Module width (L2) | 115.00–140.00 mm (4.53–5.51 in) |
| Module width (L3 standard) | 55.00 mm (2.17 in) |
| Module width (L3 safety) | 89.00 mm (3.50 in) |
| Panel-mount screw torque | 1.1–1.8 N·m (10–16 lb·in) — M4 or #8 |
| Power terminal torque (L1) | 0.5–0.6 N·m (4.4–5.3 lb·in) |
| Power terminal torque (L2) | 1.0–1.2 N·m (8.9–10.6 lb·in) |
| Wire size, power terminals (L1) | 0.05–3.31 mm² (30–12 AWG), 1 or 2 wires |
| Wire size, power terminals (L2) | 0.25–2.50 mm² (22–14 AWG), 1 wire |
Catalog Number Format
How to read an Allen-Bradley 1769 catalog number. Each position encodes a specific configuration attribute.
Position
Meaning
Example
1769
Bulletin prefix for Compact I/O / CompactLogix 5370 controllers
1769-L30ER → Bulletin 1769
-L1 / -L2 / -L3
Controller class (L1 = small, L2 = packaged, L3 = modular)
L16ER = L1 small; L24ER = L2 packaged; L30ER = L3 modular
16 / 18 / 19 / 24 / 27 / 30 / 33 / 36 / 37 / 38
Performance tier (loosely proportional to memory & node count)
16 = 384 KB / 4 nodes; 38 = 5 MB / 80 nodes
E
EtherNet/IP built-in (always present on 5370 family)
L30ER, L33ER, etc.
R / RM
R = EtherNet/IP only; M = Integrated Motion on EtherNet/IP
L30ER = no motion; L30ERM = motion-capable
K
Conformal-coated variant (K-suffix)
L30ERMK, L33ERMK, L38ERMK
S
Compact GuardLogix safety controller (SIL 3 / PLe)
L30ERMS, L33ERMSK, L38ERMS
O
Armor (on-machine IP67) variant
L33ERMO, L36ERMO, L38ERMOS
-BB1B / -BB1BK / -QB1B / -QBFC1B
L1/L2 power+I/O suffix (BB = 24V DC in/out, Q = QB sink/src, FC = with analog/HSC, K = conformal)
L16ER-BB1B = 24V DC embedded I/O; L24ER-QBFC1B = with analog + HSC
Communication Protocols
Supported industrial networks and field buses for the products covered by this publication.
EtherNet/IP Dual-port built-in with embedded switch (single IP, DLR-capable)
DeviceNet Via 1769-SDN scanner module (L2/L3); not native on L1
Integrated Motion on EtherNet/IP 1–16 axes depending on controller; M-suffix required
USB (programming) One USB port, temporary Studio 5000 connection only
Safety (Compact GuardLogix) CIP Safety over EtherNet/IP; SIL 3 / PLe Cat 4 certified
ControlNet Not native — bridge via 1769-SDN or external module
Certifications & Compliance
c-UL-us Listed Industrial Control Equipment (UL Files E65584 / E322657 / E334406)
UL Listed Class I Division 2 Groups A,B,C,D Hazardous Locations (UL File E194810)
UKCA + CE (EN 61131-2, EN 61326-3-1, EN 61000-6-4, EN 61000-6-2)
UKCA + CE Machinery Directive — Compact GuardLogix (EN 61508-1…7, EN ISO 13849-1, EN 62061)
EN IEC 63000 RoHS (UK SI 2012 No. 3032 / EU 2011/65)
RCM (Australian Radiocommunications Act, EN 61000-6-4)
ATEX / UKEX Zone 2 Protection "nA" / "ec" II 3 G Ex T4 Gc (EN 60079-0, EN 60079-7/-15)
IECEx System — L2 controllers (IEC 60079-0 / -7, IECEx UL 21.0112X)
TÜV Functional Safety SIL 3 — Compact GuardLogix 5370 only
Morocco Arrêté ministériel no 6404-15 du 29 ramadan 1436
CCC (China) Explosion-Proof Electrical Products — CNCA-C23-01:2019
KC (Korea) Radio Waves Act, Article 58-2, Clause 3
EtherNet/IP conformance tested (ODVA)
Document Contents
Full PDF covers the following topics in detail:
- Catalog-number breakdown for CompactLogix 5370 L1/L2/L3, Compact GuardLogix 5370, Armor CompactLogix, 1769 Packaged, 1769 Modular, 1768 CompactLogix, and memory cards
- Features table by catalog number: tasks, ports, EtherNet/IP node counts, embedded I/O, Integrated Motion axes, programming languages
- Agency certifications matrix: c-UL-us, UKCA/CE, RCM, IECEx, ATEX/UKEX, TÜV SIL 3, Morocco, CCC, KC, ODVA
- Environmental specifications: temperature, humidity, vibration, shock, ESD, radiated RF, EFT/B, surge, conducted RF
- Technical specifications: user memory, safety memory, I/O expansion, current draw, power dissipation, isolation, weight, dimensions
- Real-time clock accuracy and hold-up times by ambient temperature
- L1 embedded I/O specifications: DC input, DC output, and power supply
- L2 embedded I/O specifications: DC input/output, analog input/output, high-speed counter, and power supply
- L3 local I/O support and multi-bank expansion rules (up to 3 banks, 30 modules)
- Controller memory use, controller compatibility, connections, and accessory catalog
In-Stock Products Covered by This Document
Every product below is in stock at our Charlotte, NC warehouse and covered by this publication. Ships same-day (orders before 4 PM ET) with 2.5-year warranty included.
Frequently Asked Questions
How much user memory does each CompactLogix 5370 controller have?
User memory scales with the performance tier. 1769-L16ER-BB1B has 384 KB; L18ER/L18ERM/L18ERM-BB1BK have 512 KB; L19ER has 1 MB; L24ER-QB1B has 750 KB; L24ER-QBFC1B and L27ERM-QBFC1B have 1 MB; L30ER family has 1 MB; L33ER family has 2 MB; L36ERM has 3 MB; L37ERM has 4 MB; L38ERM has 5 MB. Compact GuardLogix -S variants add 0.5–1.5 MB of dedicated safety memory on top of the standard user memory.
Which CompactLogix 5370 controllers support Integrated Motion on EtherNet/IP?
Controllers with an M suffix support Integrated Motion. Axis counts by catalog: 1769-L18ERM-BB1B / L18ERM-BB1BK (1–2 axes), 1769-L27ERM-QBFC1B and L30ERM family (up to 4 axes), L33ERM family (up to 8 axes), and L36ERM / L37ERM / L38ERM families (up to 16 axes). Non-M controllers (L16ER, L18ER, L19ER, L24ER, L30ER, L33ER) do not support integrated motion axes.
How many local I/O modules can a CompactLogix 5370 L3 controller support?
The L3 controller sits leftmost in the local bank and supports up to 3 banks of 1769 Compact I/O modules connected by 1769-CRL1 / 1769-CRR1 expansion cables. L30ER/L30ERM variants support 8 modules; L33ER/L33ERM support 16; L36ERM / L37ERM / L38ERM support 30 or 31 modules. Up to 8 modules per bank right of the power supply; banks can be horizontal or vertical; an end cap is required on the last bank.
What's the difference between a CompactLogix 5370 and a Compact GuardLogix 5370?
A Compact GuardLogix 5370 (S-suffix, e.g., 1769-L30ERMS, L33ERMS, L38ERMS) is a 1769-L3 CompactLogix that adds a certified safety task with dedicated safety memory, achieving SIL CL 3 per EN 62061 / IEC 61508 and PLe per EN ISO 13849-1. Safety and standard logic coexist in one project; during development multiple programmers, online edits, and forcing are allowed. After applying the safety-lock, the safety task is fixed at SIL 3 integrity while standard logic continues to allow online edits and forcing.
Which SD cards are compatible with the CompactLogix 5370?
The 5370 family uses 1784-SD1 (1 GB) or 1784-SD2 (2 GB). The 1784-SD2 ships with the controller; the 1784-SD1 is available separately. Earlier 1784-CF128 CompactFlash is listed for legacy 1769/1768 platforms only. The battery that older CompactLogix platforms required is not needed — the 5370 uses internal energy-storage for clock and memory hold-up (35-day typical hold-up at 25°C).
Is the CompactLogix 5370 rated for hazardous locations?
Yes. All CompactLogix 5370 and Compact GuardLogix 5370 controllers are UL-listed for Class I, Division 2, Groups A, B, C, D (UL File E194810). They also carry ATEX / UKEX Zone 2 Protection "nA" or "ec" II 3 G Ex T4 Gc certifications under EN 60079-0 / 60079-7 / 60079-15. L2 packaged controllers additionally hold IECEx (IECEx UL 21.0112X). TÜV functional safety certification (SIL 3) applies only to the Compact GuardLogix (-S) variants.
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