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
Description
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
Technical data
Approvals
Mechanical values and environment
| 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 |
Electrical connection ratings
| 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 Ui | 250 V |
| Rated impulse withstand voltage Uimp | |
| Leakage path/air gaps | 4 kV |
| Overvoltage category according to IEC EN 60664-1 | 3 |
| Reverse polarity protection | |
| On version UB =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 |
Other
| In compliance with | EN ISO 13849-1: 2015; EN 62061: 2005 + AC: 2010 + A1: 2013 + A2: 2015; EN 50581: 2012 (RoHS) |
Reliability values according to EN ISO 13849-1
| 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.) |
| PFHD | 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.) |
| PFHD | 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.) |
Downloads
Complete package
Download all important documents with a single click.
Content:
- The operating instructions and any additions to the operating instructions or brief instructions
- Any data sheets to supplement the operating instructions
- The declaration of conformity
Single Documents
Declarations of conformity
EU-Konformitätserklärung
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EU-Konformitätserklärung
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EDC2090791
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0,2 MB
UKCA-Konformitätserklärung
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UKCA-Konformitätserklärung
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EDC20001502
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0,1 MB
Instructions
Operating Instructions Safety Relay ESM-BT4..
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Operating Instructions Safety Relay ESM-BT4..
Mode d’emploi Unité de base ESM-BT4..
Manual de instrucciones Módulo básico ESM-BT4..
Betriebsanleitung Basisgerät ESM-BT4..
Mode d’emploi Unité de base ESM-BT4..
Manual de instrucciones Módulo básico ESM-BT4..
Betriebsanleitung Basisgerät ESM-BT4..
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2109074
Version
04/24
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1,5 MB
Betriebsanleitung Basisgerät ESM-BT4..
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2109074
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04/24
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0,4 MB
Other Documents
Approvals and certificates
CCC
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CCC
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20001751
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0,0 MB
c UL us
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c UL us
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1,0 MB
c UL us
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0,2 MB
Ordering data
| Ordernumber | 090820 |
| Item designation | ESM-BT421 |
| Gross weight | 0,253kg |
| Customs tariff number | 85364110 |
| ECLASS | 27-37-18-19 Device for monitoring of safety-related circuits |
