Schneider Electric TM3DI16G Modicon TM3 16 Input Module

TM3DI16G: TM3 16-input digital module with spring terminals

The TM3DI16G is a Modicon TM3 digital input module with sixteen 24 V DC inputs that work in sink or source wiring. It adds a block of field inputs to a Modicon M221, M241, M251 or M262 controller through the TM3 expansion bus, in a case only 27.4 mm wide and with pluggable spring terminals.

Within the TM3 input family it is the general-purpose 16-point choice: more inputs per slot than TM3DI8G and spring terminals in contrast to the HE-10 connector of TM3DI16K. Seven Star LLC supplies the this unit in Oman and the GCC as an independent supplier based in Muscat.

The TM3DI16G compared with other TM3 input modules

Technical specifications of the TM3DI16G

Sensor supply and wiring of the TM3DI16G

A sensor supply range of 19.2 to 28.8 V is listed, which means the field supply must stay inside this window. Terminals are ten removable 1.5 mm² spring clamps at 3.81 mm pitch accepting 0.14 to 1.5 mm² (26 to 16 AWG) solid conductor. Unshielded input cables can be up to 50 m long.

Because sink and source wiring are both allowed, the common terminals can be wired to 0 V or 24 V to suit PNP or NPN sensors; just keep one convention across the module.

Selection checklist and RFQ details for the TM3DI16G

Check before ordering:

• 16 channels at 24 V DC are needed and Type 3 characteristics are acceptable
• spring terminals and 1.5 mm² wire fit the site standard
• the controller family has spare TM3 positions
• the sensor supply stays within 19.2 to 28.8 V

Send quantity, controller model and delivery location with your RFQ.

Bus load and isolation of the TM3DI16G

The module draws 34 mA at 5 V DC from the expansion bus and is isolated from it by 500 V AC between channels and bus. A green LED per channel shows the input status, which is the first diagnostic when a sensor or switch is suspected.

Reliability is quoted as an MTBF of 250 years at 40 °C, a useful figure for maintenance planning.

Typical uses of the TM3DI16G in the GCC

Sixteen-input blocks collect limit switches, valve position feedback, motor status contacts, level switches and operator pushbuttons in pump stations, water treatment plants, utility buildings and packaged machines. Spring terminals help installers who work in confined, hot cabinets where tightening screws is slow.

Certifications listed include CE, cULus, UKCA, RCM, EAC and cULus HazLoc.

During commissioning, switch each field device in turn and watch the channel LED and the controller variable together; a mismatch usually points to a polarity or common-terminal wiring error. Label the terminal rows clearly before closing the panel, because sixteen similar-looking inputs are easy to confuse during later fault finding.

Mounting and environment of the TM3DI16G

The module is 27.4 mm wide, 90 mm high and 84.6 mm deep and weighs 0.1 kg. It snaps onto a 35 mm DIN rail or is fixed on a panel with the kit. Operating limits are −10 to 55 °C horizontal and −10 to 35 °C vertical, humidity is 10 to 95 % without condensation, and protection is IP20.

Vibration withstand is 3.5 mm at 5–8.4 Hz and 3 gn at 8.4–150 Hz, and shock withstand is 15 gn for 11 ms.

Input characteristics of the TM3DI16G

Each input draws 7 mA at 24 V DC and has an impedance of 3.4 kΩ. The datasheet states conformity to IEC 61131-2 Type 3 for all sixteen channels, with a guaranteed state 1 between 15 and 28.8 V DC (at least 2.5 mA) and a guaranteed state 0 between 0 and 5 V DC (at most 1 mA). Response time is 4 ms for both turn-on and turn-off.

Type 3 inputs tolerate the leakage of two-wire proximity sensors better than Type 1, but they still need a clean 24 V supply. The module is not intended for fast pulse counting; use the controller fast inputs for that.

Documents and quotation

The Schneider Electric datasheet for the this unit is attached on this page, so you can compare the listed values with your design before ordering.

To request a quotation for the TM3DI16G, send the quantity, delivery destination and any project reference through the RFQ form. Seven Star LLC supplies Schneider Electric automation products in Oman and the GCC as an independent supplier based in Muscat, and we confirm stock status and lead time against your request.