Siemens EN 50295 manual 101

AS-Interface Slaves

Modules with special functions

				Earth fault detection modules
■Technical specifications
		Earth fault detection module
		With screw-type terminal connection	With Cage Clamp terminal connection
		3RK1 408-8KE00-0AA2	3RK1 408-8KG00-0AA2
	Total current input in mA	￿40
	Polarity reversal protection	Built-in
	Earth fault	10% UAS-i ￿UGND ￿90% UAS-i
	Low signal range
	• I IN in mA
		1.5
	High signal range
	• U IN in V
		10
	• I IN in mA
		￿6
	Current carrying capacity 1)
	• DC 12 in A	1 (max. 2 per module)
	• DC 13 in A	500 (24 V)2)
	• DC 13 in mA	200 (48 V)2)
	Operating cycles DC 12	2 ￿106
	Rated operating voltage range in V	24 to 48 DC
	Degree of protection	IP20
	Dimensions (H x W x D) in mm	102 ￿22.5 ￿92
	Rated temperature in °C	25
	Ambient temperature in °C	-25 to +70			6
	Storage temperature in °C	-40 to +85
	Addressing	The module does not require an individual AS-Interface address
	Connection	Screw-type terminal connection	Spring-loaded terminal connection
	Conductor cross-sections in mm2
	• Solid	--	2	(0.25–1.5)
	• Finely stranded with end sleeve
		--	2	(0.25–1)
	• Finely stranded without end
		--	2 ￿(0.25–1.5)
	sleeves
	• AWG conductors,
		--	AWG 2 ￿(24–16)
	solid or stranded
	Note	If repeaters are used, each AS-Interface segment needs its own earth fault detection module
		(number of AS-Interface power supply units = number of earth fault detection modules)

1)UAux should be protected with a slow-action 2 A fuse.

2)For increasing the relay endurance with inductive loads,

a protective circuit with free-wheeling diodes is recommended.

Siemens IK PI · 2004

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