EUCHNER – More than safety.
EUCHNER – More than safety.

ESM-BA201 (Rend. sz. 085610)

Basic device ESM-BA2.., 2 safety contacts, cat. 4

  • ESM-BA.. Use up to category 4 according to EN ISO 13849-1
  • LED status indicators
  • 1-channel or 2-channel control
  • 2 redundant safety contacts
  • Short circuit and earth fault/ground fault monitoring
ESM-BA201 (Rend. sz. 085610)


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 or a 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 a connecting cable and earth or ground and to shut down the outputs or prevent relay starting if necessary.

Connection terminals

Optionally, the ESM-BA... devices are also available as versions with plug-in connection terminals.

Dimension drawing
Dimension drawing
Block diagram
Block diagram

Dimension drawings

Dimension drawings

Connection examples

Connection examples

Műszaki adatok


Zulassung EACZulassung TÜV Rheinland, BMPB mit ZG: Product Safety, Functional SafetyZulassung c_UL_us LISTED

Mechanikai értékek és környezet

Housing material
Housing Polyamide PA6.6
Net 0,23 kg
Ambient temperature
At UB = 24V AC -15 ... 40 °C
At UB = 24V DC -15 ... 60 °C (at 20% undervoltage T<sub>max</sub>: 50°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
Number of safety contacts 2

Elektromos csatlakoztatási értékek

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.)
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
Connection rating
at 24V DC 1,5 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
S11...S14 40 mA
LED indicator 2 status displays (green) for relays K1 and K2
Safety contacts 13/14, 23/24
Type of output
NO Relay contacts, floating and positively driven (redundant) (Positively driven relay according to EN 50205)
Switching voltage
AC max.250 V
DC max.24 V
Switching current min.20 mA at 24V
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 6A ohmic load, 250V (6 operating cycles/min.)
DC-12 6A ohmic load, 24V (6 operating cycles/min.)
Breaking capacity according to UL 6A 250V AC / 2A 24V DC per contact


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

Megbízhatósági értékek az EN ISO 13849-1 szerint

Performance Level PL e (This value is dependent on the number of switching cycles and the switching current.)
Category 4 (This value is dependent on the number of switching cycles and the switching current.)
PFHD 1.2 x 10-8 (This value is dependent on the number of switching cycles and the switching current.)
Number of switching cycles
≤ 1 A at 24 V DC max.100000 1/Jahr
≤ 3 A at 24 V DC max.22500 1/Jahr
≤ 0.1 A at 24 V DC max.400000 1/Jahr
Mission time 20 y (This value is dependent on the number of switching cycles and the switching current.)


Complete package

Download all important documents with a single click.


  • 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
Download complete package (ZIP, 1,0 MB)

Single Documents

Other Documents

Ordering data

Rend. sz. 085610
Articlename ESM-BA201
Weight 0,202kg
Customsclass 85364110
ECLASS 27-37-18-19 Gerät zur Überwachung von sicherheitsgerichteten Stromkreisen

Műszaki támogatás

Műszaki támogatás
Do you have technical questions about our products, their possible use or applications? Our experts will be happy to help.

EUCHNER Magyarország Kft.
+36 1919 0855