Baumuller b maXX BM3400 Series - Page 109

Safety relay (option) 6.15T
The switch-off of the electrical drive motor operates dual-ported.
• S2 (NC) and S3 (NO) have hardware effects on the pulse enable input of the converter (X26:11). Only
if S2 and S3 have a closed cover (therewith a safe state), there is voltage at the pulse enable of the
converter.
• S1 (NC) has hardware effects on the safety relay of the converter of the converter (X102:3.4). Only if
S1 shows a closed cover (and therewith a safe state), there is voltage at the safety relay input (X102:3.4)
and therewith makes a torque generation at the shaft of the motor possible. The NO contact of S1 is
connected to a monitoring circuit.
• The monitoring circuit is a error-safe monitoring control of category 3 (EN 954-1), checks the directly
connected switching contacts of S1 (NO), S2 (NO) and S3 (NC) on its own. If the cover is not completely
shut or there is a theoretical impossible state of the positioning switch contacts (e.g. S1 and S2 show a
different switch state or S2 and S3 show the same switch state), then the control circuit does not receive
an enable signal from the monitoring circuit. A missing release signal of the monitoring equipment
leads to a immediate switch-off of the converter with the help of the control circuit. If the monitoring
circuit has detected an error (e.g. different switch state of S1 and S2), the machine engineer will be
informed about this and the commissioning of the drive is impossible until the error was repaired.
• The status signal contact of the safety relay (X102:1,2 NC) can be additionally evaluated by the monitor-
ing circuit (this is not imperative).
• The positioning switches which are used must have imperatively operated and mechanically connected
contacts as well as a two-channel-connection (NC-/NO contact). The mechanical operation at the
safety device must take place imperatively, that means tamper-resistant.
The connection cab les between the safety relay input (X102:3.4) and of the control as well as between the
pulse enable input at the converter (X 26: 11) and the control may not be installed together outside of the
switching cabinet in one cable channel.
Instrution Manual b maXX ® BM3400 109
Doument No.: 5.07013.03 from 206