GE VersaMax Nano/Micro Replacement Guide

Micro 20 (12 in/8 out, maximum 132 points)

Model Output Type Power Supply High speed Counter Built in User Power Supply

IC200UDD020 24 VDC source type, with ESCP 24 VDC 4A+1B @ 100kHz 32-bit 435 mA

IC200UDD220 24 VDC leakage type 24 VDC as above 435 mA

IC200UDR120 Relay 120/240 VAC Same as 435 mA

IC200UDR020 relay 24 VDC as above 435 mA

Micro 40 (24 in/16 out, maximum 152 points)

Model: IC200UDD040 (Source ESCP), IC200UDD240 (Leakage), IC200UDR140 (Relay AC), IC200UDR040 (Relay DC), IC200UDR440 (Relay 12/24 VDC). The parameters are similar to Micro 20, only doubling the number of I/O points.

Micro 64 (40 inputs/24 outputs, maximum 176 points)

Model: IC200UDD064 (Source ESCP), IC200UDD164 (Leakage), IC200UDR164 (Relay AC), IC200UDR064 (Relay DC). Width 190 mm.

Highlight: The high-speed counter performance of Micro 20/40/64 has been greatly improved: 4 A-type+1 B-type, 100 kHz, 32-bit. PWM/pulse output up to 4 channels, 65 kHz, 32-bit. Suitable for servo pulse control and high-speed counting applications.

3.3 Micro 23 and Micro 28 (built-in analog, still active)

Micro 23 (13 in/10 out, maximum 135 points)

Built in 2 analog inputs (0~10V/0~20mA/4~20mA, 12 bits) and 1 analog output (same range).

The program memory is 9 K words and the registers are 2 K words.

Model: IC200UAL004 (12 VDC power supply) IC200UAL005（24 VDC）、IC200UAL006（120/240 VAC）。

Micro 28 (16 in/12 out, maximum 140 points)

No built-in analog, but expandable.

Provide a variety of output types: 120 VAC thyristors, relays, 24 VDC transistors.

The models include: IC200UAA007 (AC input/AC output), IC200UAR028 (AC input/relay), IC200UDD110/120 (24 VDC input/output), IC200UDD212 (12 VDC input/output), IC200UDR005/006/228/010, etc.

Both Micro 23/28 provide two serial ports: Port 1 is RJ-45 RS-232, and Port 2 is DB-15 RS-485 (supporting Modbus RTU master/slave and SNP master/slave). In addition, they support portable program download devices (PPDDs), which are very convenient for on-site maintenance.

Expansion Unit Configuration Guide

VersaMax Micro supports up to 4 expansion units and can mix discrete I/O and analog I/O modules. The width of all expansion units is 95 mm (Micro 20/40/64 expansion units come in two types: 150 mm and 190 mm).

4.1 Discrete Extended Unit Selection Table (Some Typical)

Model I/O configuration power supply characteristics

IC200UE108 8 × 24 VDC input 24 VDC -

IC200UE016 16 × 24 VDC input 24 VDC -

IC200UE0008 8 × 24 VDC output (ESCP) 24 VDC self recovery electronic protection

IC200UE0016 16 × 24 VDC output (ESCP) 24 VDC -

IC200UER008 8 × 2A relay output 24 VDC universal

IC200UER016 16 16 × 2A relay output 24 VDC -

IC200UEC108 4-in/4-out (24 VDC source type) 24 VDC balanced type

IC200UEC208 4 in/4 out (relay) 24 VDC -

IC200UEX015 8 × 12 VDC input/6 × 12 VDC output 12 VDC 14 point combination module

IC200UEX011 8 × 120 VAC input/6 × relay output 120/240 VAC AC input combination

IC200UEX009 8 × 120 VAC input/6 × relay (2 × 10A+4 × 2A) 120/240 VAC large capacity output

IC200UEX215 16 × 12 VDC input/12 × 12 VDC output 12 VDC 28 point combination

IC200UEX222 16 × 24 VDC input/12 × 24 VDC output (ESCP) 24 VDC transistor protection

IC200UEX064 40 × 24 VDC input/24 × relay output 24 VDC 64 point combination (only supported by Micro 20/40/64)

Selection skills:

For situations that require a large number of relays, UER016 or UEX064 are preferred.

For output that requires short-circuit protection and frequent switching, a transistor output module with the "ESCP" symbol (such as UE0008) must be selected to avoid external fuses.

The combination module (UEX series) can save rack space, but it should be noted that its power supply voltage must match the CPU.

4.2 Simulation Expansion Unit

The Micro series supports up to 4 analog extensions, with a maximum of 16 inputs/8 outputs. Typical model:

Model Type Input/Output Range Resolution Power Supply

IC200UEX624 4-channel analog input 0~10V/4~20mA 12 bit 24 VDC

IC200UEX616 4 In/2 Out Same as 12 Bit 12 VDC

IC200UEX626 4 In/2 Out Same as 12 Bit 24 VDC

IC200UEX724 4-channel RTD (PT100) 2/3 line 16 bit 24 VDC

IC200UEX726 4 RTD input/2 analog output PT100+current/voltage 16/12 bit 24 VDC

IC200UEX824 4-channel thermocouple/mV K, J, E, S, T, B, N; ± 50/± 100mV 12 bit (16 bit optional) 24 VDC

Note: 16 bit resolution is only available when supported by Micro 20/40/64 (requires Machine Edition 5.0 SP3 Hotfix).

Communication and Network Options

The communication capability of VersaMax Nano/Micro is a key consideration in its replacement and upgrade.

5.1 Built in serial port

Nano: Single RJ-45 RS-232, supports SNP, SNPX, Modbus RTU slave.

Micro 14: Same as above.

Micro 23/28: Port 1 RS-232 (RJ-45), Port 2 RS-485 (DB-15), Port 2 supports Modbus RTU master/slave, SNP master/slave, and serial port read/write commands.

Micro 20/40/64: Port 1 RS-232, Port 2 is a modular slot that can be plugged into the following option boards:

Options board model, interface, additional functions, memory module support

IC200UEM001 Ethernet (10/100) SRTP, Modbus TCP server is

IC200USB001 RS-232 (RJ-45) 2-channel 0~10V analog input (10 bits) is

IC200USB002 RS-485 (RJ-45) 2-channel analog input is

IC200UUB001 USB 2.0 slave only has SNP/Modbus slave and no analog