AnasayfaProductsSafety relays, control systems and filter moduleSafety relay ESMESM-BT421

ESM-BT421 (Sip. No. 090820)

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Safety relay ESM-BT.., 4 safety contacts, time-delay, cat. 4

Use 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 1 contact time-delayed
Delay time range 1 s–30 s
Short circuit and earth fault/ground fault monitoring

Açıklama

Relay outputs

The outputs are electrically decoupled and of redundant design.

Connection options

By 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 connecting cables and to shut down the outputs or prevent relay starting if necessary

Earth fault/ground fault monitoring to detect short circuits between the connecting cables and earth or ground and to shut down the outputs or prevent relay starting if necessary.

Time-delayed shutdown

The release time for the time-delay contacts can be set as required using a potentiometer on the safety relay.

Dimensional drawings

Connection examples

Teknik Veriler

Onaylar

Zulassung TÜV Rheinland, BMPB mit ZG: Product Safety, Functional Safety

Mekanik Değerler ve Çevre

Housing material
Housing	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, 33/34, 47/48
Number of safety contacts	4

Elektriksel Bağlantı Değerleri

Drop-out delay at 24V AC	max.20 ms Emergency stop
Drop-out delay at 24V DC	max.30 ms Emergency stop
Operating voltage
AC/DC	24 V -10% ... +10% (All the electrical connections must either be isolated from the mains supply by a safety transformer according to EN 61558-2-6 with limited output voltage in the event of a fault, or by other equivalent isolation measures.)
Power consumption (apparent power)
At 24V AC	5,3 VA
Rated insulation voltage U_i	250 V
Rated impulse withstand voltage U_imp
Leakage path/air gaps	4 kV
Overvoltage category according to IEC EN 60664-1	3
Reverse polarity protection
On version U_B =24V DC
Rated supply frequency	50 ... 60 Hz
Connection rating
at 24V DC	4,7 W
Degree of contamination (external, according to EN 60947-1)	2
Connection cross-section	0,14 ... 2,5 mm² (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
LED indicator	4 status displays (green) for relays K1, K2, K3, K4
	Safety contacts 13/14, 23/24, 33/34, 47/48
Type of output
NO	Relay contacts positively driven (redundant) (Positively driven relay according to EN 50205)
Switching voltage
AC	max.250 V
DC	max.24 V
Switching current	min.5 mA at 24V
Cumulative current	max.15 A For all contacts (Cumulative current at an ambient temperature of T= 20° C: 9A ;T= 30° C: 3A ; T= 40° C: 1A. If these currents are exceeded, a spacing of 5 mm between the devices must be observed.)
Fusing
External contact fuses (safety circuit) according to IEC 60269-1	10A gG
Utilization category acc. to EN 60947-5-1
AC-15	3A, 250V
DC-13	3A, 24V
AC-12	8A ohmic load, 250V (6 operating cycles/min.)
DC-12	8A ohm resistive load, 40V (6 operating cycles/min.)
Breaking capacity according to UL	8A 250V AC / 3A 24V DC per contact
Switching characteristics	3 safety contacts non-delayed, 1 safety contact time-delayed (Contact switching behavior: n.d.: non-delayed d.: delayed)
Delay time
Continuously adjustable	1 ... 30 s

Çeşitli

In compliance with	EN ISO 13849-1: 2015; EN 62061: 2005 + AC: 2010 + A1: 2013 + A2: 2015; EN 50581: 2012 (RoHS)

In compliance with

EN ISO 13849-1: 2015; EN 62061: 2005 + AC: 2010 + A1: 2013 + A2: 2015; EN 50581: 2012 (RoHS)

EN ISO 13849-1 uyarınca güvenilirlik değerleri

	Switching contacts time-delay
Category	3 (This value is dependent on the number of switching cycles and the switching current.)
Performance Level	PL e (This value is dependent on the number of switching cycles and the switching current.)
PFH_D	8.84 x 10^-8 (This value is dependent on the number of switching cycles and the switching current.)
	Switching contacts non-time-delay
Category	4 (This value is dependent on the number of switching cycles and the switching current.)
Performance Level	PL e (This value is dependent on the number of switching cycles and the switching current.)
PFH_D	4.22 x 10^-8 (This value is dependent on the number of switching cycles and the switching current.)
Number of switching cycles
≤ 0.1 A at 24 V DC	500000 1/Jahr
≤ 1 A at 24 V DC	300000 1/Jahr
≤ 2 A at 24 V DC	100000 1/Jahr
Mission time	20 y (This value is dependent on the number of switching cycles and the switching current.)

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