SecurLAN
®
Optical Cutoff Switch Installation
3
Applic
ation N
ot
e
A tri-color LED next to each optical port indicates the status of data flowing through the
port:
Table 1 -
Status LED States
The Optical Cutoff Switch comes with a front panel designed to facilitate mounting
in our 4 U, 19-inch instrument rack, RK-210. The front panel measures 1.78 inches
across and 6.82 inches tall. Two captive screws in the upper and lower left-hand cor-
ners allow the user to mount the Optical Cutoff Switch in the instrument rack.
A 5-pin terminal block mounted on the rear panel of the Optical Cutoff Switch has con-
nection points for external power as well as input from the SecurLAN system.
Table -
Optical Cutoff Switch Rear Panel Pinout
Input power to the Optical Cutoff Switch is limited to 6-15 VDC, 10 mA. If input voltage
drops below 6 VDC, the normally-closed Optical Cutoff Switch opens, disrupting the
optical data flow. Input voltage over the 15 volt limit damages the switch.
Note:
If the 15 volt maximum limit is exceeded, the status LEDs blink rapidly to warn
the user.
o
peratIng
p
rIncIples
The Optical Cutoff Switch is designed to pass optical data from the input connector to
the output connector on its front panel. Inside the Optical Cutoff Switch, the optical path
from the input to the output connector is interrupted only by an internal optical switch.
When +6-15 VDC power is applied to the Optical Cutoff Switch, the internal switch is in
the “closed circuit” position and data is allowed to pass through uninhibited.
Status LEDs
rear panel pinout
Input voltage limit
LED Color
Indication
Green
Data is transmitting through the
primary port OK
Red
No data is transmitting
Amber
Data is transmitting through the
alternate port OK
Pin
Description
1
+6 - 15 VDC input power
2
Ground
3
Input 1 (not used)
4
Input 2 (1 x 3 configuration only)
5
Input 3