SYSMAC CPM2A

What is this controller typically used for?

It is a compact programmable controller used for small to mid-sized machine and process automation, such as conveyors, packaging equipment, pumps, simple indexing, interlocks, and general discrete control where a reliable I/O-based PLC is required.

What I/O sizes are available in this controller family?

CPU Units in this family are commonly available with 20, 30, 40, or 60 built-in I/O points, designed for systems that can scale up to higher total I/O counts with expansion.

What power supply options are available?

Models are available for 100 to 240 VAC (50/60 Hz) supply or for 24 VDC supply. Ensure the CPU Unit variant matches the panel supply and the intended wiring standards.

What output types can I choose from?

Depending on the CPU Unit, outputs can be relay type or transistor type. Transistor output models are available in sinking and sourcing variants, which should be selected to suit the load wiring method.

How many expansion units can be connected?

Up to three Expansion Units and/or Expansion I/O Units can be connected to a CPU Unit (subject to the specific expansion type and any power limitations when certain communications adapters are used).

Can I add analogue I/O to the controller?

Yes. Analogue I/O can be added using dedicated Analogue I/O Units. Up to three units can be used to reach the maximum analogue capacity stated for the system configuration.

Can I connect temperature inputs such as thermocouples or Pt100?

Yes. Temperature Sensor Units are available for thermocouple (e.g., K, J) and platinum resistance thermometer inputs (e.g., Pt100/JPt100), allowing temperature signals to be brought into the control program.

What communications ports are provided on the CPU Unit?

The CPU Unit provides a Peripheral Port for connection to programming devices/host communications and an RS-232C port for serial communications to compatible external equipment. Port behaviour can be affected by the communications switch and PC Setup settings.

Which programming consoles are compatible?

Two handheld programming consoles are commonly used with this controller family: CQM1-PRO01-E and C200H-PRO27-E. Their key functions are equivalent for typical programming and monitoring tasks.

Does the CPU Unit support a built-in 24 VDC service supply?

On AC-powered CPU Units, an external 24 VDC service output is available for input devices only (not for driving outputs). It must be kept within the specified current limit, and an overload/short can cause the voltage to drop and the controller to stop.

What are the recommended installation and environmental limits?

Install the unit in the correct orientation for cooling, typically within a control panel, and keep within the operating environment limits (for example, 0°C to 55°C operation with appropriate humidity limits and no condensation). Avoid corrosive gases, excessive vibration, and high electrical noise areas.

Can the terminal block be removed for easier wiring?

The terminal block on the CPU Unit can be removed to assist with wiring. Expansion Units and Expansion I/O Units typically use fixed terminal blocks and are not removable in the same way.

Is there a battery for memory backup, and when is it relevant?

Yes. A backup battery is used to maintain specific memory areas. It is important to follow correct procedures for replacing the battery and to ensure any configuration changes are properly stored before battery replacement to avoid losing retained settings.

How can I copy a user program between controllers without a computer?

An Expansion Memory Unit can be used to upload the ladder program (and, if required, specific data memory ranges) from one controller to an EEPROM, then download it to another controller of the same type. Always verify the program and data after transfer.

What should I consider for electrical noise when using relay outputs?

Relay output switching can generate electrical noise depending on load type and switching frequency. If emissions are a concern, use appropriate external suppression components on the load side and good wiring practices such as segregating power and I/O wiring within the panel.