TM3DQ8RG

What does this module do in a Modicon TM3 system?

It adds eight discrete relay output channels to a Modicon TM3 I/O expansion system, allowing a controller to switch external loads using normally-open relay contacts.

How many outputs are provided, and what type are they?

There are 8 outputs, each implemented as a normally-open relay contact.

What loads can the relay outputs switch?

The relay outputs are rated for switching 24 V DC or up to 240 V AC, with a maximum output current of 2 A per channel (2000 mA).

Can the outputs be wired for either sourcing or sinking logic?

Yes. The module supports positive or negative output logic, so you can wire it as source (positive logic) or sink (negative logic) depending on the application.

Are the common terminals tied together internally?

No. The COM0 and COM1 terminals are not connected internally, which allows you to separate commons for different output groups if required.

What is the typical switching response time?

Typical response time is 10 ms for turn-on and 5 ms for turn-off.

What is the minimum load the relay outputs are designed to switch?

The specified minimum load is 10 mA at 5 V DC per relay output. This helps indicate suitability for very small loads.

How is output status indicated?

Each channel has its own green LED to indicate output status locally.

What type of terminal connection does it use?

It uses a removable spring terminal block with 5.08 mm pitch, with 11 terminals and a conductor capacity up to 2.5 mm².

What controllers is it compatible with?

It is designed for use with Modicon controllers including M221, M241, M251, and M262 when used within a Modicon TM3 expansion system.

What mounting options are supported?

It supports DIN rail mounting on TH35-7.5 or TH35-15 rails (IEC 60715), and can also be mounted to a panel using a fixing kit.

What are the module dimensions and weight?

Dimensions are approximately 90 mm (H) × 84.6 mm (D) × 27.4 mm (W), with a net weight of about 0.11 kg.

What isolation ratings are provided between circuits?

Specified insulation ratings are 2300 V AC between output and internal logic, 750 V AC between outputs, and 1500 V AC between output groups.

Do inductive loads require any additional protection components?

Yes. For inductive DC loads, it is recommended to fit a freewheeling diode in parallel with the load; for inductive AC loads, an RC snubber in parallel is recommended to help protect relay contacts and extend service life.

What are the environmental operating limits?

Operating temperature is -10 to 55 °C for horizontal installation and -10 to 35 °C for vertical installation, with 10–95% relative humidity (non-condensing). The module is rated IP20 when the protective cover is in place, and is intended for operation up to 2000 m altitude.