• Usage up to category 4 according to EN ISO 13849-1
• LED status indicators
• 1-channel or 2-channel control
• 4 redundant safety contacts of which 2 contacts time-delayed
• Delay time-range 1 s - 30 s
• Short circuit and earth fault/ground fault monitoring
• 24 V DC for ESM-BT411

Relay outputsThe outputs are electrically decoupled and of redundant design. Connection optionsBy using suitable wiring the following functions can be selected:

• Relay start with automatic start, a start button or a monitored start button
• Monitoring of downstream relays or contactors
• Simultaneity monitoring to monitor safety components over time
• Relay start using a monitored start button
• Short circuit monitoring to detect short circuits between the connection cables and to shut down the outputs or prevent relay starting if necessary
• Earth fault/ground fault monitoring to detect short circuits between the connection cables and earth or ground and to shut down the outputs or prevent relay starting if necessary.

Time-delayed shutdownThe release time for the time-delay contacts can be set as required using a potentiometer on the safety relay. Dimension drawing ESM-BT411 Dimension drawingESM-BT411 Technical dataApprovals Mechanical values and environment

Housing material	Polyamide PA6.6
Weight
Net	0,25 kg
Ambient temperature	-15 ... 40 °C
Degree of protection	IP20
Mechanical life
operating cycles	10 x 106
Contact material	AgSnO2
Mounting method	Mounting rail 35mm according to DIN EN 60715 TH35
Connection	Connection terminals
Length of control cable
With conductor cross-section 0.75mm2	1000 m
	Safety contacts 13/14, 23/24, 37/38, 47/48
Number of NO contacts	4

Electrical connection ratings

Operating voltage
AC/DC	24 V -10% ... +10%
Power consumption (apparent power)
At 24V AC	5,3 VA
Rated insulation voltage Ui	250 V
Rated impulse withstand voltage Uimp
Leakage path/air gaps	4 kV
Reverse polarity protection
On version UB =24V DC
Rated supply frequency	50 ... 60 Hz
Power consumption
at 24V DC	4,7 W
Degree of contamination (external, according to EN 60947-1)	2
Connection cross-section	0,14 ... 2,5 mm? Connection terminal (size)
Test voltage
Control system/contacts	2,5 kV
Control voltage
On S11	24 V 18,6 ... 26 V Start button
Control current	190 mA
Drop-out delay	max.20 ms Emergency stop
LED indicator	4 status displays (green) for relays K1, K2, K3, K4
	Safety contacts 13/14, 23/24, 37/38, 47/48
Type of output
NO	Relay contacts floating and positively driven (redundant)
Switching voltage
AC	max.250 V
DC	max.50 V
Switching current	min.5 mA at 24V
Cumulative current	max.15 A For all contacts
Fusing
External contact fuses (safety circuit) according to IEC 60269-1	10A gG (T6A / F8A)
Utilization category according to EN 60947-5-1
AC-15	3A, 250V
DC-13	3A, 24V
AC-12	8A ohmic load, 250V
DC-12	8A ohmic load, 50V
Breaking capacity according to UL	8A 250V AC / 3A 24V DC per contact
Switching characteristics	2 safety contacts non-delayed, 2 safety contacts time-delayed
Delay time
Continuously adjustable	1 ... 30 s

Other

In compliance with

EN 60439-1: 1999 + A1: 2004, EN 60947-1: 2007, EN 60947-5-1: 2004, EN 60947-7-1: 2002, EN 61000-6-2: 2005, EN 61000-6-3: 2007, EN ISO 13849-1: 2015, EN 62061: 2005 + AC: 2010 + A1: 2013 + A2: 2015, EN 60204-1: 2007

Reliability values according to EN ISO 13849-1

Performance Level	PL e
Category
Safety contacts time-delay	3
Safety contacts non-time-delay	4
PFHD
Safety contacts time-delay	8.84 x 10-8
Safety contacts non-time-delay	4.22 x 10-8
Number of switching cycles
? 1 A at 24 V DC	max.350000 1/Jahr
? 2 A at 24 V DC	max.100000 1/Jahr
? 0.1 A at 24 V DC	max.500000 1/Jahr
Mission time	20 y

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