Safe Stop Installation - Danfoss VLT AQUA Instruction Manual

2 Safety

2.1.7 Safe Stop Installation

To carry out an installation of a Category 0 Stop (EN60204) in
conformity with Safety Category 3 (EN954-1), follow these in-
structions:
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1. The bridge (jumper) between Terminal 37 and 24 V DC must be
removed. Cutting or breaking the jumper is not sufficient. Re-
move it entirely to avoid short-circuiting. See jumper on illus-
tration.
2. Connect terminal 37 to 24 V DC by a short circuit-protected ca-
ble. The 24 V DC voltage supply must be interruptible by an
EN954-1 category 3 circuit interrupt device. If the interrupt de-
vice and the adjustable frequency drive are placed in the same
installation panel, you can use an unshielded cable instead of a
shielded one.
The illustration below shows a Stopping Category 0 (EN 60204-1) with safety Category 3 (EN 954-1). The circuit interruption is caused by an opening
door contact. The illustration also shows how to connect a non-safety-related hardware coast.
Figure 2.2: Illustration of the essential aspects of an installation to achieve a Stopping Category 0 (EN 60204-1) with safety Category 3 (EN
954-1).
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Figure 2.1: Bridge jumper between terminal 37 and 24 VDC
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VLT AQUA High Power Instruction Manual