Sentinel Press Brake Guarding System Operation Manual
LS-CS-M-066
Page 6
Original Language Version: 1.06
Released:
03/07/2019
3.2
System Components
The system contains the following components:
•
LZS-2 Transmitter/Receiver pair.
•
PGS-2 Safety Controller.
•
Sentinel User Interface Panel.
•
Optical Rotary Encoder.
•
Bracket system for the LZS-2 Transmitter and Receiver.
P
O
W
ER
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P
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/O
G
P
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TS
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C
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, G
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LZ
S-
2
TX
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C
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X
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/O
LZ
S-
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RX
, L
C
R
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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-2
TRANSMITTER
LZS-2
RECEIVER
CN
7
CN
8
ROTARY
ENCODER
{
{
{
{
FORMING SPEED RELAY
AUX RELAYS
CRAWL SPEED RELAY
ENABLE RELAYS
Sentinel
User Interface
Panel
Figure 3-2: Sentinel Press Brake Guarding System Components
3.3
Optical Protection Overview
The Sentinel Press Brake Guarding System comes as standard with the LZS-2 Block Laser
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 continuous block of laser light that
monitors the zone below the punch. If an obstruction is detected the closing movement is
stopped. The punch cannot make contact with the obstruction.
The Sentinel 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-2 Block Laser
The LZS-
2 transmitter projects a ‘block’ of laser light approximately 48 mm wide by 30 mm
high that surrounds the danger zone of the punch, and is detected by sensors in the LZS-2
receiver. During normal operation the block laser is always active.
