TM3AI4

Configured for analog signal acquisition in Modicon M221, M241, M251, and M262 controller systems, the Schneider Electric TM3AI4 (TM3AI4 analog input module) provides four configurable voltage or current inputs through removable screw terminals. It operates from a 24 VDC external supply and exchanges I/O data with the controller through the TM3 bus.

Hardware Specifications

Parameter	Specification
Model	TM3AI4
Brand	Schneider Electric
Product Type	Analog input module
Product Range	Modicon TM3
Compatible Controllers	Modicon M221, M241, M251, M262
Analog Inputs	4
Input Types	4-20 mA, 0-20 mA, 0-10 V, -10 to 10 V
Resolution	12 bits; 11 bits + sign
Input Impedance	<= 50 Ohm for current inputs; >= 1 MOhm for voltage inputs
Sampling Duration	1 ms
Conversion Time	1 ms + 1 ms per channel + 1 controller cycle
Continuous Overload	13 V voltage; 40 mA current
Accuracy	+/- 0.1 %FS at 25 deg C; +/- 1 %FS
Repeat Accuracy	+/- 0.5 %FS
Cross Talk	<= 1 LSB
Insulation	1500 V AC input-to-supply; 500 V AC input-to-internal logic
Supply	24 VDC external supply
Current Consumption	30 mA at 24 VDC; 35 mA at 5 VDC no load; 45 mA at 5 VDC full load
Electrical Connection	Removable screw terminal block, 3.81 mm pitch
Cable Type	Twisted shielded pair, input cable length up to 30 m
Dimensions	23.6 mm W x 70 mm D x 90 mm H
Weight	0.11 kg
Operating Temp	-10 to 55 deg C horizontal; -10 to 35 deg C vertical
Storage Temp	-25 to 70 deg C
Protection Rating	IP20
Mounting	TH35-15 or TH35-7.5 DIN rail; plate or panel
Environmental Humidity	10-95 % RH, non-condensing
Operating Altitude	0-2000 m
Local Indication	Green PWR LED
Standards	IEC 61131-2
Country of Origin	JP
GTIN	3606480648908

Analog Input Signal Characteristics

The TM3AI4 accepts both current and voltage analog signals. The four channels can process 4-20 mA, 0-20 mA, 0-10 V, or -10 to 10 V signals. The specified LSB values are 3.91 uA for 4-20 mA, 4.88 uA for 0-20 mA, 2.44 mV for 0-10 V, and 4.88 mV for -10 to 10 V.

The module provides 1500 V AC insulation between the inputs and supply and 500 V AC insulation between the inputs and internal logic. Cross talk is specified at <= 1 LSB. A 10 ms immunity to microbreaks is specified for the module.

For Schneider Electric PLC systems, I/O density is extended through the TM3 bus connector, which distributes data and power between assembled TM3 modules and the associated M2xx controller. Configuration and programming are supported through EcoStruxure Machine Expert.

Frequently Asked Questions

Q: What analog signal ranges can the TM3AI4 measure?
A: The module supports 4-20 mA, 0-20 mA, 0-10 V, and -10 to 10 V analog inputs.

Q: What mounting methods are supported?
A: The module can be mounted on TH35-15 or TH35-7.5 DIN rail conforming to IEC 60715, or on a plate or panel using the specified fixing kit.

Q: What cable arrangement is specified for the analog inputs?
A: Twisted shielded pair cable is specified, with an input cable length of up to 30 m.

Field Installation Guidelines

• Mount the module on the specified DIN rail or panel surface and engage the TM3 interlocking mechanism before connecting the bus.
• Verify the 24 VDC external supply polarity before energizing the module.
• Use the removable screw terminals for field wiring and tighten conductors according to the applicable terminal installation requirements.
• Route analog signal wiring separately from high-current power and switching circuits to reduce induced interference.
• Use twisted shielded pairs for analog signals. Terminate the shield according to the control cabinet grounding design and avoid creating unintended ground loops.
• Keep voltage and current signal wiring identified by channel so that the configured input type corresponds to the connected field device.
• Confirm the controller and TM3 module configuration in EcoStruxure Machine Expert before placing the analog channels into service.
• Do not exceed the specified continuous input overload limits of 13 V for voltage inputs and 40 mA for current inputs.
• Maintain the specified environmental limits and IP20 installation conditions during operation.

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