MAYSER SG-EFS 104/2W - User Manual

Questions and Answers

H
Heather RiddleAug 14, 2025
What to do if the red LED “Fault“ is on and signal output M2 is LOW on my MAYSER Control Unit?
- E
  Eugene BryanAug 15, 2025
  If the red LED “Fault“ is on and the signal output M2 is LOW, it could be due to an incorrect monitoring resistor on the sensor. Ensure the sensor is connected with the correct monitoring resistor, either 1k2 or 8k2. Another potential cause is that the sensor is incorrectly connected. Verify the terminal connections, ensuring that a sensor with 1k2 is connected to Y1 and Y2, or a sensor with 8k2 is connected to Y1 and Y3. Also, a cable break can cause this problem, so replacing the sensor might be needed.
E
Edwin MullinsAug 18, 2025
Why is the green LED “Sensor“ off and signal output M1 is LOW on my MAYSER SG-EFS 104/2W Control Unit?
- C
  cory72Aug 18, 2025
  If the green LED “Sensor“ is off and the signal output M1 is LOW, the issue might be an incorrect monitoring resistor on the sensor. To resolve this, connect the sensor with the correct monitoring resistor, either 1k2 or 8k2. Another possibility is that the sensor is incorrectly connected. Check the terminal connections to ensure the sensor with 1k2 is connected to Y1 and Y2, or the sensor with 8k2 is connected to Y1 and Y3. If these steps don't solve the problem, consider replacing the sensor.
J
Janet WatkinsAug 21, 2025
What to do if green LED “Sensor“ is on and green LED “Output“ is off on MAYSER SG-EFS 104/2W Control Unit?
- W
  Wanda SingletonAug 21, 2025
  If the green LED “Sensor“ is on but the green LED “Output“ is off, several manual reset issues could be the cause. First, check if the reset button has not been activated, and if so, activate it. Second, the connection to the button might be broken; verify this connection. Third, the button may be jammed, requiring replacement of the buttons on S1 and S3. For automatic reset, a missing bridge could be the issue; connect a bridge between S1 and S2. If none of these steps resolve the issue, the control unit may need to be replaced.
D
Denise ValenzuelaAug 25, 2025
How to fix a MAYSER SG-EFS 104/2W when the green LED „Power“ is off?
- K
  Kelly HarrisonAug 26, 2025
  If the green LED „Power“ is off, it could be due to no or incorrect supply voltage. Check the supply voltage and compare it with the type plate. Also, examine the terminal connections. If the issue persists, the control unit may need replacement.
D
destinymendozaAug 28, 2025
What causes MAYSER Control Unit to have green LEDs “Power“, “Sensor“ and “Output“ on while OSSD 2 is open?
- G
  Gregory ClarkAug 28, 2025
  If the green LEDs “Power“, “Sensor“ and “Output“ are on, and OSSD 2 is open, the suggested solution is to replace the control unit.
B
Brett HaleAug 31, 2025
What to do if the red “Fault” LED is on and signal output M2 is LOW on MAYSER SG-EFS 104/2W Control Unit?
- A
  Amber TrevinoAug 31, 2025
  If the red “Fault” LED is on and signal output M2 is LOW on your MAYSER Control Unit, it could be due to an incorrect monitoring resistor on the sensor. Try connecting the sensor to a monitoring resistor 1k2 or 8k2. Also, ensure the sensor is correctly connected by checking the terminal assignment. If there is a cable break, replace the sensor.
D
Debra ChavezSep 4, 2025
Why is the green “Sensor” LED not lighting up and signal output M1 is set to LOW on my MAYSER SG-EFS 104/2W?
- J
  Jerry BakerSep 4, 2025
  If the green “Sensor” LED isn't lighting up and signal output M1 is LOW on your MAYSER Control Unit, it might be due to an incorrect monitoring resistor on the sensor. Connect the sensor to monitoring resistor 1k2 or 8k2. Also, check the terminal assignment to ensure the sensor is correctly connected. If the issue persists, consider replacing the sensor.
C
Caroline GarciaSep 7, 2025
What to do if the green “Sensor” LED lights up but the green “Output” LED does not light up on MAYSER Control Unit?
- J
  John MooreSep 7, 2025
  If the green “Output” LED does not light up while the green “Sensor” LED is lit on your MAYSER Control Unit, it could be due to several reasons related to the reset function. If using manual reset, ensure the reset button is activated, check the connection to the button, and if the button is jammed or sticking, replace the buttons on S1 and S3. If using automatic reset, make sure the bridge between S1 and S2 is connected. If none of these steps resolve the issue, consider replacing the control unit.
R
Riley TranSep 12, 2025
How to troubleshoot if the green “Power” LED does not light up on MAYSER Control Unit?
- F
  fmartinSep 12, 2025
  If the green “Power” LED on your MAYSER Control Unit isn't lighting up, it could be due to no or incorrect supply voltage. Check the supply voltage and compare it with the type plate. If the voltage is correct, consider replacing the control unit.

Summary

About this manual

Validity

This manual is valid only for the product specified on the title page.

Target group

This manual is intended for the owner and electricians.

Symbols used

Explains the meaning of symbols used for actions and cross-references.

Danger symbols and information

Defines danger symbols (DANGER, WARNING, CAUTION, NOTE) and their meanings.

Dimensions in drawings

Specifies that dimensions are in millimetres unless otherwise indicated.

Safety

Intended use

The control unit processes signals from pressure-sensitive protective devices and evaluates sensor states.

Safety instructions

Provides crucial safety guidelines for installation, operation, and maintenance to prevent hazards.

Parts supplied

Storage

Instructions for storing control units in their original packaging in a dry environment.

Product overview

Connections

Details the terminal connections for supply voltage, sensor inputs, OSSD outputs, and signal circuits.

Reset

Automatic reset

The control unit operates without a reset function; changes from OFF to ON automatically.

Manual reset

The control unit requires a manual reset command to change from OFF to ON state.

Signal outputs

Signal outputs with U, AC

Describes PNP semiconductor outputs M1/M2 for AC voltage, with voltage and connection details.

Signal outputs with U, DC

Describes PNP semiconductor outputs M1/M2 for DC voltage, with voltage and connection details.

Connection examples 1

Connection examples 2

Contact duplication with automatic reset

Illustrates contact duplication for automatic reset scenarios.

Contact duplication with manual reset

Illustrates contact duplication for manual reset scenarios.

Commissioning

Testing

Provides step-by-step procedures for testing automatic and manual reset functions.

Correlations

Decommissioning

Instructions for safely switching off and warning the pressure-sensitive protection device.

Recommissioning

Procedure for recommissioning the device, referring to the commissioning chapter.

Maintenance and cleaning

Maintenance

States the control unit is maintenance-free and requires monthly operational tests.

Cleaning

Instructions for cleaning the outside of the enclosure with a dry cloth.

Troubleshooting and remedies

Replacement parts

Disposal

Technical data

Test principles

Lists test principles and standards applied to the product.

Times

Specifies reaction time and re-start time for the control unit.

Safety classifications

Details safety classifications according to ISO 13849-1 and ISO 13856.

Inputs

Describes sensor monitoring resistor, short-circuit resistance, and reset configurations.

MAYSER SG-EFS 104/2W Specifications

General

Supply voltage	24 V DC
Number of safety inputs	2
Number of safety outputs	2
Output type	Relay
Output Current	6 A
Protection Class	IP20
Housing Material	Plastic
Connection Type	Screw terminals