Starting guide Atom I21

Atom 4R6AD

Designed to increase the number of input ports in the system.

Functional elements

Atom I21
1. 9-48V DCPower supply
2. CAN bus ensures synchronized operationof all Atom series devices
3. 5V and 3.3V connectorsfor sensors power supply
4. 21 x inputs with optocoupler modefor connecting switches and sensors

Technical specifications

Note : Technical specifications, connection diagrams, output specifications and other technical information can be viewed on our websiteAtom I21

Installation guide

Important! During installation and operation, observe the general rules of electrical safety regarding the use of electrical appliances, as well as the requirements of regulations on electrical safety. It is strictly forbidden to disassemble a device to which any conductors are connected!

Atom series extension controllers require pre-configuration:

1. Installation

Install the controller and power supply to the DIN rail. Make sure there are no signs of mechanical damage or condensation. If necessary, install additional switchboard equipment - contactors, circuit breakers, power supplies and other automation devices.

2. Power supply

Connect the power supply to the mains via the circuit breaker. Connect the power supply output to the controller's power connector.
Controller power connectors, sensor power outputs and load control outputs for easy installation are made in the form of removable connectors with screw terminals.

Important! Although the controller has built-in protection against incorrect power connection, and in this situation will not fail, we recommend that you pay attention to the correct polarity when connecting.

Power supply Atom I21

3. i3-NET

Connect the extension controller to an i3-NET network. Install the end terminators included in the equipment kit at the ends of the bus.

i3 net Atom I21

4. Sensors power supply

A 5V and 3.3V controller outputs are provided to power the sensors.

Important! If the system uses sensors or actuators with other operating voltages, use additional power supplies or the power supply that powers the controller. If the system uses several power supplies - connect their "negative" terminals to each other.

5. Input connections

Connect sensors, switches and other devices to the inputs of the module. Connectors with screw clamps are used at the inputs of the expansion module, which ensures the convenience and reliability of connecting conductors with a cross-section of up to 2.5 mm2.
When connecting end devices, such as switches, digital sensors, dangerous interference can occur on long lines, so we use additional protection and improvement of the inputs using optocoupler mode.

Important! Inputs are numbered. "COM" is a common contact, it must be connected to the "plus" of the input power supply. Each input must be connected to a "dry contact" or "open collector" of a connected sensor, switch, or some other device with a "minus" of this power source.


6. Done. Turn on the power

Important! Check all connections. Make sure that the power supply, inputs and outputs are connected correctly.

List of typical problems and their solutions

  • The device is turned on, but is not visible in the application settings

    1. Check the presence of supply voltage on the module2. Check the polarity of the power supply

  • The load does not turn on or reacts incorrectly

    1. Check the correctness and reliability of the connection2. Check if the connected load operates properly

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