Safety Relays Specifications | Engineering360

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Performance


	Maximum Current		This is the maximum continuous current allowable across the relay output terminals under the specified heat dissipation and ambient temperature conditions. Generally, AC current is specified in RMS units. Maximum current is also known as the maximum switching voltage range, or the maximum switching current.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Maximum AC Switching Voltage		This is the maximum AC switching voltage.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Maximum DC Switching Voltage		This is the maximum DC switching voltage.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Maximum AC Switching Power		The maximum AC switching power is measured in volt amperes (VA).
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Maximum DC Switching Power		The maximum DC switching power is measured in watts (W).
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

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Relay Configuration


	Relay Configuration
	Your choices are...
	Single Channel		Capable of accepting only one NC input. When used in safety circuits they are unable to detect a short circuit failure or a failure of the monitored input to change state.
	Dual Channel		Ensures safety system integrity even if one logic circuit fails. Capable of accepting two inputs; one to each of its two, redundant self-monitoring safety circuits. Capable of detecting wiring faults or a failure of one of the monitored inputs to change state.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Number of Inputs
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

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Number of Contacts


	Normally Open (NO)		With normally open (NO) devices, the relay contact pair is open when the coil is not energized.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Normally Closed (NC)		With normally closed (NC) devices, the relay contact pair is closed when the coil is not energized.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Changeover (CO)		Changeover relays typically have one set of Form C contacts and are single-pole, double-throw (SPDT) devices.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

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General Specifications


	Mounting
	Your choices are...
	Bracket (Flange) Mount		The relay is equipped with a flange. Typically, this flange is installed by bolting the unit to a matching flange that is welded to a corresponding wall.
	DIN Rail		The relay is equipped with a fastener that can attach to a DIN rail.
	Panel		The relay can be mounted in or on a panel.
	PC Board		The relay can be mounted on a printed circuit board (PCB).
	Socket or Plug-in Style		The relay can be mounted in a socket or on a printed circuit board (PCB).
	Other		Other unlisted mounting styles.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Power Supply


	Power Supply
	Your choices are...
	AC Power Supply		The module requires an AC power supply.
	DC Power Supply		The module requires a DC power supply.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Safety Ratings and Approvals


	Safety Ratings and Approvals
	Your choices are...
	Category / Type 1		Loss of function may occur after a single fault. Devices are designed after well-established components and principles.
	Category / Type 2		Loss of function may occur if a fault appears between two test cycles.
	Category / Type 3		The safety function is maintained in case of a single fault.
	Category / Type 4		The safety function is maintained in case of multiple faults.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Features


	Manual Reset Option		Devices have a manual-reset option.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Replaceable Fuse		The device has a replaceable fuse.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Time Delay		Relays provide time delay on make, time delay on break, single shot, recycling, and interval timing functions.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Visual Indicator		The relay has visual indicator such as a light-emitting diode (LED).
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

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Environment


	Operating Temperature		This is the full-required range of ambient operating temperature. This represents the surrounding air temperature limits.
	Search Logic:		User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.

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