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Proton Products SL mini and SLR mini Series Speed and Length Gauges Instruction Manual - issue 1s
L
ASER
E
NABLE
The laser enable input is provided for compliance with laser safety regulations.
The laser diode in the gauge may be energised only if the “
LSR_EN
”
pin (pin 14) is connected
(via an external user-supplied switch contact) to any one of the
“DGND” pin
s (pins 2, 15, 24).
The gauge requires a few minutes for the laser temperature to stabilise and for valid
measurement after “
LSR_EN
” is connected to “DGND”. For this
reason, it is recommended
that the laser enable input is connected to a safety interlock that is active infrequently, such
as a maintenance lock-out key switch.
Safety interlocks that are frequently activated and require the gauge to immediately resume
measurement upon deactivation (such as a machine guard door) should be connected to the
shutter enable input (“
SHUT_EN
”) described in the next section.
Connector type: DB25 female (socket)
Functional
group
Pin Designation
Description
Notes
Shield
S
Shield
Shield
Connect to cable and plug shields
Power
supply and
ground
25
+24V SUPPLY
+24V power
supply
2
DGND
Power supply and
signal ground
(0V)
15
24
Laser
enable
14
LSR_EN
Laser enable
Connection
Laser diode state
Open
Off (no emission)
Connected to DGND
On (emission)
1
1
4
2
1
5
3
1
6
4
1
7
5
1
8
6
1
9
7
2
0
8
2
1
9
2
2
1
0
2
3
1
1
2
4
1
2
2
5
1
3