Installation
Mono Power Unit BUM 62 T 37
Baumüller Nürnberg GmbH 5.99009.03
y The position switches, which are used, must unavoidable have actuated and mechanical connected
contacts as well as a dual-port connection (NC contact/ NO contact). The mechanical operating at
the safety device must take place unavoidable, that means tamper-resistant.
The connection cables between the safety relay input (X68: 3,4) and the control as well as between the
impulse release input at the converter (X3:5) and the controller must not be installed outside the control
cabinet in a common cable channel.
Application example for machine of category 4
Additional procedures when configuring a machine make it possible with a converter of the category 3
(EN 954-1) at safety-relevant operations for the “protection against unexpected starting” also category
4 for the complete drive.
A possibility is the usage of a contactor, with which the external conductors of the motor cable is short-
circuited.
The diagram shows exemplary the usage and cabling of a Baumüller converter of the series BUM 6, BUS
6 or BKH of a machine tool, at which the safe taking of work pieces at opened barrier according to cat
-
egory 4 (EN 954-1) is possible.
Example for an application for safe stop according to category 4 (EN 954-1)
The switching-off of the electrical drive motor takes place three-ported.
y The contactor K1 with three NC contacts short-circuits the current to the motor in the release state
in all poles (closed-circuit current principle), so that no electrical energy of the converter arrives at
the motor. S2 (NC contact) and S3 (NO contact) effectuate K1. Only if S2 and S3 display a closed
barrier (and therewith a safe condition) K1 starts up and the short-circuit in the motor line is reset.
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