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Siemens 321-1BH02-0AA0 Interface Relay

Siemens 321-1BH02-0AA0 24V DC Interface Relay

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ManufacturerSiemens

Part number321-1BH02-0AA0

Coil Voltage 24V DC

Contact Configuration SPDT

Contact Rating (Specify if found)

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12-month warranty

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Veteran-owned

CAGE: 9NK75

24V DC Coil SPDT Contacts Compact Size High Reliability Signal Isolation

Product description

The Siemens 321-1BH02-0AA0 is a compact interface relay featuring a 24V DC coil and a Single Pole Double Throw (SPDT) contact configuration. It's designed for signal level switching and interfacing between different control circuits.

This relay is commonly used in automation systems for isolating control signals, switching low-power loads, and enabling communication between PLC outputs and higher-power devices. It finds applications in control panels, safety circuits, and general machine automation.

Stanlo Automation, a veteran-owned business specializing in surplus industrial automation parts, offers this Siemens interface relay. We are your source for reliable components to keep your automation systems operational.

Technical specifications

Coil Voltage	24V DC
Contact Configuration	SPDT
Contact Rating	(Specify if found)

Common applications

Control Panels

PLC Interfacing

Signal Switching

Automation Systems

Machine Control

Compatible systems

Siemens S7-300 Siemens LOGO! General industrial control

Also known as

Siemens 321-1BH02-0AA0 relay Siemens 24V DC relay

Replaces / compatible with

This Siemens interface relay is compatible with various control systems requiring a 24V DC coil and SPDT switching. It is often used to replace older or failed interface relays.

Technical note

Expert tip

Ensure the coil voltage precisely matches the supply to prevent premature failure or unreliable operation of the relay.

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Frequently asked questions

What type of contacts does the Siemens 321-1BH02-0AA0 interface relay have?

The Siemens 321-1BH02-0AA0 interface relay features Single Pole Double Throw (SPDT) contacts. This means each pole has one normally open (NO) and one normally closed (NC) contact.