EOS – Status display
Emitter – All models
| Three colour LED | Meaning |
| ⊗ | System power-on – Initial TEST |
| ⊗ 2 Flashes | System power-on – HIGH working range selected |
| ⊗ Blinking |
FAIL condition – The type of fault is identified by the number of flashes – See next „Fail condition table“ |
| ⊗ | TEST condition |
| ⊗ | Normal operating condition |
Fail condition
| Three colour LED | Nr Flashes | Meaning |
| ⊗ | 2 consecutive | Irregular connection of pins 2 and 4 |
| ⊗ | 3/4 consecutive | Internal falilure |
| ⊗ | 5 consecutive | Master and slave not compatible |
| ⊗ | Continue | Awaiting communication Master/Slave (only on Slave light curtains) |
| ⊗ | 2 consecutive | Loss of Master/Slave communication (only on Master and Slave2 light curtain) |
Receiver – All models except EOS4 14 mm and H (range 20 m) versions
| 1 Yellow LED | 2 Two colour LED | Meaning |
| ⊗ | ⊗ | System power-on – Initial TEST |
| ⊗ | ⊗ | BREAK condition |
| ⊗ | ⊗ | CLEAR condition – EOS4 X (with integrated control functions) only |
| ⊗ blinking | ⊗ blinking | BREAK_K condition – EOS4 X (with integrated control functions) only |
| ⊗ | ⊗ | GUARD condition |
| ⊗ | ⊗ blinking | FAIL condition – The type of fault is identified by the number of flashes – See next „Fail condition table“ |
| ⊗ blinking | ⊗ | MASTER light curtain free; SLAVE light curtain(s) occupied |
Fail condition
| 1 Yellow LED | 2 Two colour LED | Nr. Flashes | Meaning |
| ⊗ | ⊗ | 2 consecutive | Incorrect configuration |
| ⊗ | ⊗ | 3 consecutive | Absence Feedback |
| ⊗ | ⊗ | 4 consecutive | Interfering emitter detected |
| ⊗ | ⊗ | 5 consecutive | OSSD outputs error |
| ⊗ | ⊗ | 6/7 consecutive | Internal failure |
| ⊗ | ⊗ | 8 consecutive | Incorrect Master/Slave connections (only on Master and Slave light curtains) |
Receiver – EOS4 14 mm and H (range 20 m) versions
| 1 Two colour LED | 2 Two colour LED | Meaning |
| ⊗ | ⊗ | System power-on – Initial TEST |
| ⊗ | ⊗ | BREAK condition |
| ⊗ | ⊗ | CLEAR condition – EOS4 X (with integrated control functions) only |
| ⊗ blinking | ⊗ blinking | BREAK_K condition – EOS4 X (with integrated control functions) only |
| ⊗ | ⊗ | GUARD condition |
| ⊗ | ⊗ blinking | FAIL condition – The type of fault is identified by the number of flashes – See previous „Fail condition table“ |
| ⊗ | ⊗ | GUARD condition with weak signal |
| ⊗⊗ alterneting | ⊗ | CLEAR condition with weak signal |
| ⊗ | ⊗ | BREAK condition with weak signal |
| ⊗⊗ alterneting bilinking | ⊗ blinking | BREAK_K condition with weak signal – EOS4 X (with integrated control functions) only |
