M8 sockets, 4-pin

Notice

Incorrect signal levels due to electromagnetic interference

The digital inputs are optimized for fast signal transmission and are therefore susceptible to electromagnetic interference.

Under the influence of electromagnetic interference, a false signal level can be detected.

  • If necessary, use shielded signal lines.
M8 sockets, 4-pin 1:

Pin assignment

Pin

Function

1

+24 V US

2

Input B

3

GNDS

4

Input A

Connection example: An antivalent sensor

M8 sockets, 4-pin 2:
M8 sockets, 4-pin 3:

Diagnosis

The EPP1819-0005 has a diagnostic function for antivalent sensors. See chapter Antivalent sensors (EPP1819-0005).

Connection example: Two non-antivalent sensors

M8 sockets, 4-pin 4:

Status LEDs

There is a green LED next to each M8 socket.

M8 sockets, 4-pin 5:

The behavior of the status LED depends on whether the diagnosis for antivalent sensors is enabled.

LED signal

Meaning with disabled diagnosis

Meaning with enabled diagnosis

off

Low level on pin 2 and pin 4.

No error.

Low level on pin 4 and high level on pin 2.

green

High level on pin 2 and/or pin 4.

No error.

High level on pin 4 and low level on pin 2.

red

n/a

Error

The procedure for enabling diagnosis can be found in the chapter Antivalent sensors (EPP1819-0005).