TM3DI16

Configured for 24 VDC discrete signal acquisition in the Modicon TM3 expansion I/O system, the Schneider Electric TM3DI16 (TM3DI16 discrete input module) provides 16 logic inputs for Modicon M221, M241, M251, and M262 controllers. Inputs support sink or source logic and IEC 61131-2 Type 3 characteristics.

Hardware Specifications

Parameter	Specification
Model	TM3DI16
Brand	Schneider Electric
Product Type	Discrete input module
Series	Modicon TM3
Compatible Controllers	Modicon M221, M241, M251, M262
Number of Inputs	16
Input Voltage	24 VDC
Input Logic	Sink or source
Input Type	IEC 61131-2 Type 3
Input Current	7 mA
State 1 Voltage	15-28.8 VDC
State 0 Voltage	0-5 VDC
State 1 Current	>= 2.5 mA
State 0 Current	<= 1 mA
Input Impedance	3.4 kOhm
Maximum Response Time	4 ms turn-on / 4 ms turn-off
Typical Current Consumption	34 mA at 5 VDC
Sensor Supply	19.2-28.8 VDC
Electrical Connection	Removable screw terminal block, 3.81 mm pitch
Channel-to-Bus Isolation	500 VAC
Signal Indication	1 green LED per input channel
Maximum Cable Distance	50 m with unshielded cable for regular inputs
Mounting	TH35-15 or TH35-7.5 DIN rail; plate or panel
Dimensions	27.4 x 84.6 x 90 mm
Weight	0.1 kg
Operating Temp	-10 to 35 deg C vertical; -10 to 55 deg C horizontal
Storage Temp	-25 to 70 deg C
Protection Rating	IP20
Standards	IEC 61131-2
Certifications	CE, cULus, UKCA, RCM, EAC, cULus HazLoc
Power Consumption	34 mA at 5 VDC typical

TM3 Bus Communication and I/O Characteristics

The TM3DI16 receives its internal power through the TM3 bus and uses the bus expansion connector for data and power distribution between assembled TM3 modules and the controller. The 16 input channels accept 24 VDC signals with sink or source logic. Each channel provides local green LED indication. The module provides 500 VAC isolation between the input channels and the internal bus.

The removable terminal connection supports field wiring, while the TM3 interlocking mechanism provides mechanical coupling between adjacent expansion modules. The specified 50 m maximum cable distance applies to regular inputs using unshielded cable.

Frequently Asked Questions (FAQ)

Q: What controller platforms are compatible with the TM3DI16?
A: The module is specified for Modicon M221, M241, M251, and M262 logic controllers.

Q: What input signal does the TM3DI16 accept?
A: It provides 16 discrete 24 VDC inputs with sink or source logic. IEC 61131-2 Type 3 compatibility is specified.

Q: How is the module mounted and connected?
A: It can be mounted on TH35-15 or TH35-7.5 IEC 60715 DIN rail, or on a plate or panel with a fixing kit. Field connections use a removable screw terminal block.

Field Installation Guidelines

• Mount the module on a supported IEC 60715 DIN rail or approved panel fixing arrangement.
• Install the module with the specified TM3 interlocking and bus expansion connection fully engaged.
• Wire the 24 VDC input circuits according to the selected sink or source configuration.
• Keep discrete input wiring separated from high-voltage power and high-noise switching conductors.
• Use appropriate cable shielding and grounding practices where field wiring is exposed to electromagnetic interference.
• Do not exceed the specified 50 m cable distance for regular inputs when using unshielded cable.
• Verify input polarity, sensor supply voltage, and terminal identification before energizing the circuit.
• Maintain the specified environmental conditions, including IP20 installation requirements and pollution degree 2.
• Confirm the green channel LEDs correspond to the expected field input states during commissioning.

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