TM221M16RG

What type of controller is it and what is it typically used for?

It is a compact logic controller (PLC CPU) designed for small to medium machine control tasks, combining a CPU with onboard digital and analogue I/O and built-in communications for common industrial automation applications.

What supply voltage does it require?

It is rated for 24 V DC supply, with specified supply voltage limits of 20.4…28.8 V DC.

How many built-in digital inputs and outputs are included?

It has 16 onboard discrete I/O in total: 8 digital inputs (24 V DC) and 8 relay (normally open) digital outputs.

Are any of the digital inputs suitable for high-speed counting?

Yes. Four of the inputs can be used as fast inputs for high-speed counter (HSC) functions, with counting frequency up to 100 kHz and 32-bit counting capacity.

What analogue inputs are available and what is their signal range?

It includes 2 analogue voltage inputs with a 0…10 V input range and 10-bit resolution (LSB value 10 mV).

What are the relay output ratings?

Each relay output is rated up to 2 A, with output voltage ranges of 5…125 V DC and 5…250 V AC (with stated output voltage limits up to 125 V DC and 277 V AC). The total current per output common is specified up to 7 A.

Do the relay outputs require external suppression when switching inductive loads?

For inductive loads, external suppression is recommended to protect the relay contacts and extend service life: use a freewheeling diode across inductive DC loads or an RC snubber across inductive AC loads.

What communications interfaces are built in?

It provides a USB mini-B port for connection to a programming terminal, plus two non-isolated serial links via RJ45: one RS485 port and one RS232/RS485 port.

Which communication protocols are supported on the serial links?

The serial links support Modbus RTU/ASCII in master and slave roles. Default and supported baud rates are within 1.2…115.2 kbit/s (depending on interface and cable length).

What memory and backup features are provided?

It provides 256 kB user application/data RAM (with a stated capacity of 10,000 instructions) and 256 kB internal variables RAM, plus 256 kB built-in flash for backup of application and data. An optional SD card up to 2 GB can be used for additional data storage.

Does it have a real-time clock and battery backup?

Yes. It includes a real-time clock and uses a BR2032 lithium (non-rechargeable) battery with an indicated battery life of around 4 years. Backup time is stated as up to 1 year at 25 °C during power interruption.

How many expansion modules can be added?

It supports up to 7 I/O expansion modules (relay output expansions are supported). This allows the system to be extended beyond the onboard I/O when additional points are required.

What mounting options and dimensions should be allowed for panel layout?

It is suitable for DIN top-hat rail mounting (TH35-7.5 or TH35-15) and can also be panel-mounted with a fixing kit. Overall dimensions are approximately 90 mm (H) x 70 mm (W) x 70 mm (D), with a product weight of about 0.264 kg.

What operating environment ratings does it have?

It is rated IP20 with protective cover in place and designed for operation at -10…55 °C in horizontal installation (or -10…35 °C in vertical installation). Storage temperature is specified at -25…70 °C, with 10…95% relative humidity (non-condensing).