Schneider Electric TM3AM6 Modicon TM3 4AI/2AO Analog Module

TM3AM6: Modicon TM3 module with 4 analogue inputs and 2 outputs

The TM3AM6 is a Modicon TM3 expansion module that adds four analogue inputs and two analogue outputs to an M221, M241, M251 or M262 controller. Each channel can be configured for 4–20 mA, 0–20 mA, 0–10 V or ±10 V, so one module covers transmitters, valve positioners, drive references and chart-style indicators.

It is a mixed module: instead of buying a separate input card and output card, this unit puts both on one 23.6 mm wide slot of the controller bus. Its spring-terminal sibling is TM3AM6G, and the output-only versions are TM3AQ2 and TM3AQ2G. Seven Star LLC supplies the this unit in Oman and the GCC as an independent supplier in Muscat.

Signal ranges and resolution of the TM3AM6

Inputs and outputs offer the same four ranges. The resolution is 12 bits, or 11 bits plus sign for the bipolar range. The datasheet gives the smallest step as 2.44 mV on 0–10 V, 4.88 mV on ±10 V, 4.88 µA on 0–20 mA and 3.91 µA on 4–20 mA.

Input impedance is 50 Ω or less for current and at least 1 MΩ for voltage, and the continuous overload limits are 13 V and 40 mA. Outputs expect a resistive load of 1 kΩ or more for voltage and up to 300 Ω for current.

Accuracy and timing of the TM3AM6

Absolute accuracy is ±1 % of full scale over the operating range and ±0.2 % at 25 °C. Repeat accuracy on inputs is ±0.5 % of full scale, temperature drift is ±0.01 % of full scale per °C, and non-linearity is ±0.2 %. Output ripple is 20 mV and cross-talk is 1 LSB or less.

Conversion takes 1 ms plus 1 ms per channel plus one controller cycle, so this module suits typical process signals that change over seconds, not fast motion loops. Stabilisation after a change is 1 ms.

Technical specifications of the TM3AM6

Power budget of the TM3AM6

Typical consumption is 45 mA at 5 V DC with no load and 55 mA at full load, plus 55 mA at 24 V DC with no load and 100 mA at full load. These numbers are part of the expansion bus budget of the controller, so add them to those of the other modules when you plan a rack.

The housing is 23.6 mm wide, 90 mm high and 70 mm deep and weighs 0.11 kg. It clips on a 35 mm DIN rail or can be fixed to a panel with the kit.

The TM3AM6 against other TM3 analogue modules

Bold marks the current reference.

Wiring the TM3AM6 in the cabinet

The datasheet lists a removable terminal block of ten 1.5 mm² terminals with a pitch of 3.81 mm. The text for this catalogue number does not state the terminal style, whereas the G version is described as spring; if a particular style matters on site, confirm it against the reference you are ordering. Use twisted shielded pairs for analogue lines and keep each run under 30 m.

The module is powered from the controller bus and also needs the external 24 V supply for field circuits. Insulation is 1500 V AC between input or output and supply and 500 V AC between signals and internal logic.

Selection checklist and RFQ details for the TM3AM6

Confirm before ordering:

• that the controller (M221, M241, M251 or M262) supports the TM3 bus and has free expansion slots
• which range each signal needs: voltage or current, unipolar or bipolar
• that the terminal style fits the cable and tools used on site
• the total 5 V and 24 V budget of the expansion bus

Send quantity, controller type and delivery location with the RFQ.

Typical roles of the TM3AM6 in Gulf plants

Analogue mixed modules are used where a small controller reads a pressure or level transmitter and drives a control valve or a VFD speed reference from the same location, for example in water booster sets, dosing skids, cooling circuits and air-handling plants. Hot panels reduce margin, so check the operating limit of −10 to 55 °C horizontal and −10 to 35 °C vertical.

Listed certifications are CE, UKCA, RCM, EAC, cULus and cULus HazLoc, and the standard is IEC 61131-2.

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 TM3AM6, 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.