Defender Press Brake Guarding System Operation Manual
LS-CS-M-069
Page 6
Original Language Version: 1.04
Released:
01/04/2020
3.2
System Components
The system contains the following components:
•
LZS-1 Transmitter/Receiver pair.
•
PGS-2 Safety Controller.
•
Defender User Interface Panel.
•
Optical Rotary Encoder.
•
Bracket System for the LZS-1 Transmitter and Receiver.
P
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W
ER
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P
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LZ
S-
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TX
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LZ
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RX
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PGS-2
CN
1
CN
2
CN
3
CN
4
CN
5
CN
6
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15
{
{
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LZS-1
TRANSMITTER
LZS-1
RECEIVER
CN
7
CN
8
ROTARY
ENCODER
{
{
{
{
FORMING SPEED RELAY
AUX RELAYS
CRAWL SPEED RELAY
ENABLE RELAYS
Defender
User Interface
Panel
Figure 3-2: Defender Press Brake Guarding System Components
3.3
Optical Protection Overview
The Defender Press Brake Guarding System comes as standard with the LZS-1 transmitter
and receiver pair. The transmitter and receiver are mounted on the upper beam of the press
brake, allowing the operator to remain close to the work-piece as the tools close at high
speed. Hands and fingers are protected by a band of laser light that monitors the zone below
the punch.
The Defender Press Brake Guarding System continuously monitors the critical speeds and
stopping distance of the moving member of the machine. If the safe speed is exceeded and/or
the stopping distance (overrun) is exceeded, the system will issue a stop command to the
machine. There is no need for a separate speed or stopping distance (overrun) monitor.
3.3.1
LZS-1 Single Laser Optical Protection
Optical protection for the Defender system is provided by a continuous band of modulated
laser light projected from the LZS-1 transmitter, which is aligned parallel to the lowest point
of the tool or punch (the tool tip). The laser signal is detected by sensors in the LZS-1 receiver.
