Configured for analogue signal processing in Modicon M238 logic controller platforms, the Schneider Electric TM2AMM3HT (TM2AMM3HT Input/output analog module) provides direct physical/electrical execution for mixed-mode signal acquisition and output generation.

Module Configuration and Signal Mapping

The TM2AMM3HT is an integrated expansion module facilitating 2 high-level analogue inputs and 1 analogue output. It supports both 0-10 V and 4-20 mA non-differential signal formats with 12-bit resolution. The design utilizes an external 24 VDC supply to ensure signal stability, with internal isolation maintained via photocouplers between the I/O channels and the internal control logic.

Hardware Specifications

Schneider Electric Deterministic Control Characteristics

The M238 platform architecture relies on strictly managed backplane bus communication velocity to maintain I/O scan determinism. The TM2AMM3HT supports precise I/O density scaling, allowing the expansion of control capabilities while maintaining synchronization with the controller cycle. Firmware flash compatibility is governed by the host controller's I/O scanning parameters, ensuring that the 20 ms stabilization time is strictly observed within the application logic to prevent signal jitter during process transitions.

Ordering Info

• 1 x TM2AMM3HT Analogue I/O module

• 1 x Removable screw terminal block

• Note: Field wiring requires shielded cabling to meet electromagnetic compatibility standards.

Installation and Wiring Guidelines

• Mounting: Snap the module onto the 35 mm DIN-rail. Ensure the locking latch is fully engaged to maintain mechanical stability and ground contact.

• Wiring: Terminate signal lines to the removable terminal block. Maintain a strict separation between power and signal lines to prevent induced noise. Use shielded cables, with the shield grounded at the cabinet entry point.

• Insulation: Observe the 500 V dielectric strength rating between the I/O channels and the internal logic/external supply circuits to maintain system safety.

• Termination: Ensure the resistive load for voltage outputs is at least 2000 Ohm and current outputs do not exceed 300 Ohm to remain within operational specifications.

Frequently Asked Questions

• Q: Is the TM2AMM3HT hot-swappable?

  A: No, the module does not support hot-swapping. Always disconnect power to the controller and expansion rack before installation or removal to prevent electrical damage.

• Q: What are the input impedance characteristics?

  A: The module features an input impedance of >= 10 Ohm for current signals and >= 1 MOhm for voltage signals.

• Q: How is the module supplied?

  A: The module requires an external 24 VDC supply, with an allowable voltage range of 19.2 VDC to 30 VDC.

• Q: What is the output ripple specification?

  A: The analogue output ripple is specified to be <= 1 LSB under standard operational conditions.

• Q: How does the module handle signal cross-talk?

  A: The module design limits cross-talk to <= 2 LSB between analogue channels.

• Q: Can I use non-shielded cables?

  A: Shielded cable is required for all analogue connections to meet electromagnetic susceptibility requirements and ensure signal integrity.

• Q: What is the acquisition period per channel?

  A: The acquisition period is 60 ms per channel, plus the host controller cycle time.

• Q: What happens if the input signal exceeds the specified overload limit?

  A: Permissible continuous overload is 40 mA for current inputs and 13 V for voltage inputs; exceeding these limits may cause permanent damage to the input stage.