A1S64TCTT-S1

What does this temperature control module do in a MELSEC-A (AnS) PLC system?

It provides closed-loop temperature control for up to four thermocouple input channels, performing measurement, alarm handling, and control output using control methods such as PID and ON/OFF (2-position) control.

How many temperature input channels does the module support?

It supports 4 independent thermocouple input channels per module.

Which sensor types can be connected to this module?

This version is designed for thermocouple inputs (not platinum RTD inputs). Supported thermocouple types include R, K, J, T, S, B, E, N, U, L, PL, and W5Re/W26Re (ranges and resolution depend on the selected input range).

What temperature ranges and resolution are available?

Ranges depend on the selected thermocouple type and input range setting. Depending on range, the module supports 0.1° or 1° data resolution (for example, Type K can be configured for ranges such as -200.0 to 400.0 with 0.1° resolution).

What kind of control output does the module provide?

It provides transistor control outputs suitable for ON/OFF pulse control or 2-position control, enabling it to drive external control devices through appropriate interposing circuitry.

What are the transistor output electrical ratings?

Rated load voltage is 10.2 to 30 VDC. Maximum load current is 0.1 A per point and 0.4 A per common. Maximum inrush current is 0.4 A for 10 ms. Response time is less than 2 ms for ON and less than 2 ms for OFF (resistive load).

Does this module include heater disconnection (burnout) detection?

No. This model is the version without heater disconnection detection. If you require heater disconnection detection, a different temperature control module variant with that function is typically used.

What control methods are supported?

It supports PID control and ON/OFF (2-position) control. PID settings include proportional band, integral time, and derivative time, and auto-tuning can be used to assist with PID constant setup.

What is the sampling cycle for temperature measurement?

The sampling cycle is 0.5 seconds per 4 channels.

Can input filtering be applied to reduce noise on thermocouple signals?

Yes. An input filter can be configured with a setting range of 1 to 100 seconds, or disabled (0) if filtering is not required.

How does the module behave if a thermocouple is disconnected?

If a thermocouple input is not connected or becomes disconnected, the module performs upscale processing, and the channel alarm indication can be triggered depending on the operating conditions.

Does the module provide cold-junction compensation?

Yes. Cold-junction compensation is provided, and the compensation resistor is shipped pre-installed to the terminal block.

What do the front LEDs indicate?

RUN indicates module operating status (ON for normal operation, flashing patterns for specific errors, OFF when 5 V power is OFF). OUT indicates transistor output status (ON/OFF). ALM indicates alarm status (including conditions such as range exceeded or thermocouple not connected).

What wiring practices are recommended for stable thermocouple measurement?

Use shielded compensating conductors for thermocouple wiring, keep sensor wiring separated from high-voltage and inverter/load wiring, and apply one-point grounding for the shield at the PLC side as appropriate for the noise environment.

What cable and terminal sizes are supported on the terminal block?

Supported wire size is 0.75 to 1.5 mm². Supported solderless terminals include R1.25-3, 1.25-YS3, RAV1.25-3, and V1.25-YS3A.

How many PLC I/O points does the module occupy?

It occupies 32 I/O points in the PLC system.

What are the physical dimensions and approximate weight?

Approximate dimensions are 130 mm (H) × 34.5 mm (W) × 93.6 mm (D), and the weight is about 0.27 kg.

What environmental conditions are suitable for installation?

Typical installation is inside a control panel. Avoid locations outside the ambient temperature range of 0 to 55°C or humidity range of 10 to 90% RH (non-condensing), and avoid corrosive gases, conductive dust, strong electromagnetic fields, and direct vibration/shock transmission.