Operating instructions

Operating Instructions Chapter 6

C4000 Standard/Advanced

Subject to change without notice

Electrical installation

6.6 External device monitoring (EDM)

he EDM checks if the contactors actually de-energise when the protective device

responds. If, after an attempted reset, the EDM does not detect a response from the

switched device within 300 ms, the EDM will deactivate the OSSD switching outputs again.

You must implement the external device monitoring electrically by the positive closing

action of both N/C contacts (k1, k2) when the contact elements (K1, K2) reach their

deCenergised position after the protective device has responded. 24 V is then applied at

the input of the EDM. If 24 V is not present after the response of the protective device,

then one of the contact elements is faulty and the external device monitoring prevents the

machine starting up again.

 If you connect the contact elements to be monitored to the EDM input, then you must

activate the option EDM in the CDS (Configuration & Diagnostic Software. If not, the de-

vice will show the error .

 If you later deselect the EDM option, pin 6 of the system plug must not remain connect-

ed to 24 V.

Fig.

Connecting the

contact elements to the EDM

Notes



Pin 6

Pin 3





Pin 4