I/O Relay Modules

This Product Selection Guide contains information to help select products in the I/O Relay Modules category on DigiKey.com

I/O relay modules are used in industrial control, building management, and similar applications to connect control equipment to input sources such as limit switches or proximity sensors, as well as output devices such as motors or linear actuators. Typically implemented in form factors that allow ease of replacement, their primary purpose is to allow system components operating at different voltage levels and supplied by different sources to be safely connected to a shared control system.


SelectionCharacteristics

Type: Whether the module is AC or DC, Input or Output.

Color: What color the module housing is.

Style: The type of socket associated with the module.

Voltage - Input: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.

Current - Input: This represents the maximum current to which a device will meet its given specifications. Exceeding this current may damage the device and/or other system components.

Voltage - Output: Indicates the maximum output voltage that a device is capable of accommodating, subject to specified limitations or constraints.

Current - Output: The maximum amount of current that can be output by the device.

Turn On Time: Characterizes the time delay between the application of rated coil voltage and the closure (or opening) of all contacts that occurs as a result. Typically does not include contact bounce time.

Turn Off Time: Characterizes the time delay between the removal of power from the device coil and all contacts returning to their rest positions. Does not include bounce time, and may be affected by the choice of control circuitry.

Features: These are different capabilities or properties of the device such as epoxy coated or fused.

ProductExamples

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MFR PART # 70M-IDC5
DIGI-KEY PART # GH7027-ND
MANUFACTURER Grayhill Inc.
DESCRIPTION Component Mount TO-18 Circular 0.060" (1.52mm) White
DATASHEET Click Here

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MFR PART # 84130104
DIGI-KEY PART # 646-1067-ND
MANUFACTURER Sensata-Crydom
DESCRIPTION Component Mount TO-18 Circular 0.060" (1.52mm) White
DATASHEET Click Here

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MFR PART # G3TA-ODX02S DC24
DIGI-KEY PART # Z5720-ND
MANUFACTURER Omron Automation and Safety
DESCRIPTION Component Mount TO-18 Circular 0.060" (1.52mm) White
DATASHEET Click Here

SchematicSymbol

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MediaLinks

Videos

How to Choose a Relay - Another Teaching Moment | DigiKey

Product Training Modules

PC Board and DIN SSRs - TE Connectivity | DigiKey

If you have any general questions on the specifications for selecting I/O Relay Modules, please reply using the button below. If you have questions on specific I/O Relay Modules please post those questions in the Relays category.