GE VersaMax Nano/Micro Replacement Guide

GE VersaMax Nano/Micro Replacement Guide

Introduction: When VersaMax PLC faces discontinuation and upgrade

In the fields of food processing, packaging machinery, water treatment, chemical and engineering machinery, GE Fanuc's (now Emerson) VersaMax Nano and Micro series PLCs have been widely used in small and medium-sized automation systems due to their compact structure, high cost-effectiveness, and flexible scalability. However, over time, some early models (especially the Nano 10 point series) have entered the "Mature" lifecycle state, and users are facing practical problems such as difficulty in finding spare parts, program migration, and incompatible communication interfaces.

This article is based on the latest VersaMax Nano/Micro product selection guide (2023-2024), and from the perspective of engineers, provides a detailed analysis of the technical specifications, expansion unit configuration methods, second port communication options, and the use of portable program download devices (PPDDs) for Micro 14/20/23/28/40/64 models that are still in the "Active" state. At the same time, provide alternative suggestions for discontinued Nano models and common troubleshooting processes to help maintenance teams quickly complete system upgrades or fault recovery.

VersaMax Nano Series: Selection and Replacement of Compact Integrated PLCs

2.1 Nano 10 o'clock model list

The VersaMax Nano is characterized by its "integrated and ultra compact" design, with a width of only 75mm, and can be directly mounted on a DIN rail. Its 10 point I/O configuration (6 in/4 out) is non scalable and suitable for standalone devices or distributed slaves. The following are the main models of the Nano series (with a lifecycle status of "Mature", which means it is not recommended to use them in new designs):

Model Input Specification Output Specification Power Supply Built in Analog Quantity

IC200NAL110 6 × 12 VDC 4 × Relay 12 VDC 1-channel voltage input

IC200NAL211 6 × 24 VDC 4 × Relay 24 VDC 1-channel voltage input

IC200NDD010 6 × 12 VDC 4 × 12 VDC 12 VDC None

IC200NDD101 6 × 24 VDC 4 × 24 VDC 24 VDC None

IC200NDR001 6 × 24 VDC 4 × Relay 24 VDC None

IC200NDR010 6 × 12 VDC 4 × Relay 12 VDC None

Common features:

Program memory: 2K words (logic)

Register: 256 words

Two analog potentiometers (for online adjustment)

High speed counter: 2 Type A+1 Type B, 10 kHz, 16 bits

Serial port: RJ-45 (RS-232), supports SNP/SNPX, Modbus RTU slave station

Working temperature: 0~55 ℃

Shutdown replacement suggestion: When the Nano 10 point controller fails and cannot be repaired, priority should be given to upgrading to the Micro 14 or Micro 20 series. Although the volume increases, it can obtain larger program capacity (9-24 K words), more I/O points, and support for expansion units. For example, using IC200UDR001 (14 points) instead of IC200NDR001 requires redesigning the installation base plate and wiring terminals.

2.2 Precautions for migrating from Nano to Micro

Power supply voltage consistency: Nano has two types of power supply: 12 VDC and 24 VDC. Micro 14/20/28 also provides 12 V, 24 V, and 120/240 VAC versions. Please choose according to the original system voltage.

Output type: Relay output can be directly replaced, but if the original Nano is a transistor output (12/24 VDC), the corresponding DC output model of Micro (such as IC200UDD104) needs to be selected.

Program conversion: Use Machine Edition Logic Developer (VersaPro 2.0 or above) to open the original Nano project, modify the hardware configuration to the new Micro model, recompile and download. Note that I/O address mapping may change.

Terminal block: The terminal blocks of Nano and Micro are not compatible and need to be re crimped or replaced with terminal blocks.

VersaMax Micro Series: The Core of Modular Flexibility

The Micro series offers integrated CPUs from 14 to 64 points and supports up to 4 expansion units, with a maximum scalability of 176 I/O. The following is divided by points.

3.1 Micro 14 points (still active)

Micro 14 integrates 8 inputs/6 outputs, supports 4 expansion units, and has a maximum of 126 points. Common models:

Model Input/Output Power Supply High Speed Counter User Power Output

IC200UA003 8 × 120 VAC 6 × 120 VAC 120/240 VAC None None

IC200UA014 8 × 120 VAC 6 × Relay 120/240 VAC None None

IC200UDD104 8×24 VDC 6×24 VDC (2×1.0A,4×0.5A) 24 VDC 4A+1B @10kHz 200 mA

IC200UDR001 8 × 24 VDC 6 × Relay 120/240 VAC 4A+1B 200 mA

IC200UDR002 8 × 24 VDC 6 × Relay 24 VDC 4A+1B 200 mA

IC200UDR003 8 × 12 VDC 6 × Relay 12 VDC 4A+1B 200 mA

All Micro 14 devices share 9K word program memory, 256 word registers, two analog potentiometers, and an RJ-45 RS-232 serial port.

Selection points: If a large number of relay outputs are required on site and there is already 220 VAC power supply, choose IC200UA014 or UDR001; If it is a 24 VDC transistor output and requires ESCP short-circuit protection, choose IC200UDD104.

3.2 Micro 20/40/64 (High Performance Series)

These three series share 24K word program memory, 32K word registers, support 4 expansion units, and offer a second port option (RS-232/RS-485/USB/Ethernet). In addition, they also support portable memory modules (IC200UMB001) for downloading programs without a PC.