Nord-drivesystems BU0530 User Manual download pdf (Page 48)

Functional safety with NORD SK 500E frequency inverters

48 BU 0530 GB-3712

SS1:

 One safety output of the safety switching device is connected to a digital input (terminal block X5, terminals

21 ... 24). It is recommended that a shielded cable is used for this. The shield must be applied on both

sides!

 The safe pulse block is connected to a delayed safety output of the safety switching device used (terminal

89 (24V_SH) and terminal 88 (GND_SH).

It is recommended that a separate shielded cable is used for this.

The shield must be applied on both sides!

 The selected digital input must be assigned the „fast stop“ [11] function.

 For the function SS1, the parameter P426 "fast stop time" and if necessary P559, "DC follow-on time" must

be parameterised according to the requirements of the application. The delay time of the delayed output of

the protective switching device must be rated so that it is longer than the fast stop time plus the DC follow-

on time.

 The On/Off switching delay of the digital input must not be used: P475 [-0x] = 0 s!

 According to the application, disabling of the safety function may cause a hazard, so that a monitored start

is necessary. In this case, the automatic start may not be used, P428 = "Off" [0].

NOTE

The additional 15V/24V output of the inverter (terminal block X8, terminal 86, 87) has been

provided for commissioning the inverter without a safety switching device. In this case, the

15V/24V can be directly connected to the 24V input voltage of the pulse block.

As delivered, terminals 87-88 and 86-89 are bridged in order to enable commissioning or

operation without the safety function (or without ext. 24V).

Validation

NOTE

It must be proven by suitable validation that the requirements for the specially intended

purpose have been met.

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Nord-drivesystems BU0530 User Manual Page 48