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

ESM-CB-AZ-FI2-BR-IO-158875 (Order no. 158875)

IO-Link Gateway with relay outputs for BP/BR switches

  • IO-Link device for reading process and device data of BP/BR safety switches and transferring them to a higher-level control system
  • Control of guard locking of BP/BR switches, depending on the switch used
  • Compact version measuring only 18 mm in width
  • Rail mounting
  • LED status indicators
  • Sensor circuit 1: connection of single- or dual-channel safety switches with floating contacts; short circuit, earth fault and ground fault detection
  • Sensor circuit 2: connection of 2 safety outputs for BP/BR switches
  • Use as safety relay with two safe outputs
  • Start button and feedback loop can be connected
  • Safety relay: use up to category 4 according to EN ISO 13849-1
ESM-CB-AZ-FI2-BR-IO-158875 (Order no. 158875)


Connection options

The following functions are possible given the corresponding wiring:

  • Start input for automatic start or a monitored start button
  • Monitoring of downstream relays or contactors (feedback loop)
  • 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.

Relay outputs

  • The outputs are redundantly designed and electrically decoupled.
  • Simultaneity monitoring of the safety outputs to monitor safety components over time.
  • No time-delayed shutdown

Industry 4.0 ready

Process data are cyclically sent to the control system via IO-Link. These data include all status signals, such as the door or guard locking position, and the indication of whether a switch is in the limit range of the actuating range.

The process data are available to the control system after approx. 200 ms and can be used for the automation process.

Moreover, acyclical polling can be used to collect environmental data such as the internal switch temperature, the applied voltage or the ID of the transponder used, as well as other values.

Plug and Play series connection

  • Connection for safety switches with BR technology without addressing the individual switches
  • The wiring and configuration work is minimized.

Device data and events

The higher-level control system can poll more than 30 different items of information from the connected switches. Comprehensive data transmission via IO-Link enables targeted preventive maintenance, for example.

Simple implementation of innovative applications

Device data from the actuators used can be employed to detect individual rotary table positions or different containers, for example.

Dimension drawing
Dimension drawing
Wiring diagram
Wiring diagram

Dimensional drawings

Dimensional drawings

Connection examples

Connection examples

Technical data


c_UL_us_E93776EAC_RU C-DE.MO05.B.00971/20

Operating and display elements

LED display 1x operating voltage display PWR, 5x status displays DIA, STATE1, STATE2, K1/K2, IO-Link

Electrical connection values

Power consumption
at 24 V DC 1.44 W
Connection cross section 0.2 ... 1.5 mm²
Rated insulation voltage Ui 320 V
Rated impulse withstand voltage Uimp
Leakage path/air gaps 4 kV
Duty cycle 100 %
Overvoltage category according to IEC EN 60664-1 2
Power dissipation max. 6.45 W ((US=30 V, UL=30 V, I²=72 A²))
Degree of contamination (external, according to EN 60947-1) 2

Mechanical values and environment

Stripping length 8 mm
Dimensions 17.5 x 116.5 x 114.5
Connection type plug-in spring terminals
Type specification Electromechanical relay with positively driven contacts according to IEC/EN 61810-3 (EN 50205)
Installation orientation vertical or horizontal
Atmospheric humidity max. 75 % rH
Mounting type Mounting rail 35 mm according to DIN EN 60715 TH35
Degree of protection
IP54 (Installation location, min.)
Ambient temperature
(operation) -25 ... +60 °C
Housing PBT, gray
Contact AgSnO2
permissible shock and vibration load 10 Hz...150 Hz, 2 g

Characteristic values according to EN ISO 13849-1 and EN IEC 62061

Mission time 20 y (This value is dependent on the number of switching cycles and the switching current.)
according to EN ISO 13849 4
Performance Level
according to EN ISO 13849 (A demand rate of the safety function of once per month is required for applications in PL e.)
for IEC 61508 – low demand 3,76 x 10-5 (This value is dependent on the number of switching cycles and the switching current.)
for IEC 61508 – high demand 1.00 x 10-9 (This value is dependent on the number of switching cycles and the switching current.)


ESPE type Typ A


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, 3,2 MB)

Single Documents

Other Documents

Ordering data

Ordernumber 158875
Item designation ESM-CB-AZ-FI2-BR-IO-158875
Gross weight 0,231kg
Customs tariff number 85371098
ECLASS 27-24-26-07 Feldbus, Dez. Peripherie - Grundgerät

Technical support

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

+1 315 701-0315