TM3DQ16T

The Schneider Electric TM3DQ16T, also cataloged as the TM3DQ16T discrete output module, provides 16 transistor PNP source outputs for 24 VDC control signals in Modicon M221, M241, M251, and M262 PLC systems. It uses a bus expansion connector for internal power and data distribution and removable screw terminals for field wiring. The module supports switching external control devices, including variable speed drives and equipment with compatible current or voltage inputs.

Hardware Specifications

Parameter	Specification
Model	TM3DQ16T
Brand	Schneider Electric
Product Series	Modicon TM3
Product Type	Discrete Output Module
Weight	0.105 kg
Dimensions	27.4 x 84.6 x 90 mm (W x D x H)
Operating Temp	-10 to 35 deg C (vertical); -10 to 55 deg C (horizontal)
Storage Temperature	-25 to 70 deg C
Power Consumption	Internal bus powered; typical current consumption varies by supply rail
Number of Outputs	16 transistor outputs
Output Logic	Positive logic (source/PNP)
Rated Output Voltage	24 VDC
Maximum Output Current	500 mA per transistor output
Maximum Turn-On Response Time	450 us
Maximum Turn-Off Response Time	450 us
Maximum Leakage Current	0.1 mA
Maximum Voltage Drop	Less than 0.4 V
Output-to-Bus Isolation	500 VAC
Output-to-Output Isolation	Non-insulated
Electrical Connection	Removable screw terminal block, 3.81 mm pitch
Cable Cross-Section	0.14 to 1.5 mm2
Maximum Cable Distance	30 m with unshielded cable
Local Indication	One green LED per output channel
Protection Rating	IP20
Mounting	TH35-7.5 / TH35-15 DIN rail or panel mounting
Relative Humidity	10 to 95%, non-condensing
Maximum Operating Altitude	2000 m
Standards	IEC 61131-2
Certifications	CE, cULus, UKCA, RCM, EAC, cULus HazLoc
Compatible Controllers	Modicon M221, M241, M251, M262
Programming Software	EcoStruxure Machine Expert
GTIN	3606480611483
Lifecycle Carbon Footprint	33 kg CO2 eq.

PNP Output Switching and PLC Bus Integration

The TM3DQ16T uses positive-logic transistor outputs to source current to connected loads. Each output supports a maximum current of 500 mA, subject to the applicable module and installation load constraints. The maximum specified switching response time is 450 us for both turn-on and turn-off transitions.

The module receives internal power and data through the TM3 bus expansion connector. Its output circuits provide 500 VAC isolation from the bus, while the individual output channels are not isolated from one another. External load wiring must therefore account for shared electrical references and the common supply arrangement.

Each output has a dedicated green status LED. The removable screw terminal block supports field wiring with conductor cross-sections from 0.14 to 1.5 mm2.

Frequently Asked Questions (FAQ)

Q: Can the TM3DQ16T directly drive a variable speed drive?

A: It can provide control signals to a drive with compatible current or voltage input requirements. Verify the drive input interface, signal common, and electrical ratings before connecting it. The module is not a power output stage for supplying a drive's motor.

Q: Are the 16 output channels galvanically isolated from each other?

A: No. The outputs are not isolated from one another. The specified 500 VAC isolation applies between the output circuits and the internal bus. External wiring must account for this distinction.

Q: What are the mounting and operating-temperature requirements?

A: The module supports TH35-7.5 or TH35-15 DIN rail mounting and panel mounting with a fixing kit. The specified operating range is -10 to 35 deg C for vertical installation and -10 to 55 deg C for horizontal installation.

Field Installation Guidelines

• Mounting: Install the module on a compatible DIN rail or panel using the specified mounting arrangement. Maintain the required clearances and ventilation conditions of the controller assembly.
• Bus connection: Align and engage the TM3 expansion connector with the adjacent controller or expansion module. Confirm mechanical engagement before applying power.
• Field wiring: Connect the 24 VDC PNP outputs to compatible load inputs. Verify polarity, common reference, load current, and the electrical requirements of each connected device.
• Terminal tightening: Use the terminal manufacturer's specified tightening torque. Do not exceed the permitted conductor cross-section.
• Cable routing: Separate output wiring from high-voltage power conductors and high-noise switching circuits where practical. Use appropriate shielding and grounding practices for the connected equipment.
• Cable length: Keep unshielded output cables within the specified 30 m maximum.
• Commissioning: Verify channel assignments in the PLC program, inspect wiring for shorts and polarity errors, and test each output under controlled conditions. Confirm that the connected load remains within its electrical limits.
• Environmental conditions: Maintain the applicable temperature and humidity limits. The IP20 rating does not provide protection against water ingress or conductive contamination.

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