SecurLAN
®
Optical Cutoff Switch Installation
Applic
ation N
ot
e
5. For 1x3 Optical Cutoff Switches, repeat Steps 3 and 4, connecting a second
relay on the ORM to Pin 4 of the Optical Cutoff Switch (“Input 2”). This second
relay is then used to move the internal switch between Port A, Port B, and the
Off position in accordance with Table 4.
Table -
Optical Cutoff Switch Input Truth Table
The maximum wiring distance between the power supply and the Optical Cutoff Switch
is 15 meters (50 feet) assuming 22 AWG, 8 conductor, shielded cable is used. Once
completed, the Optical Cutoff Switch is connected to the system as shown in Figure 4.
maximum wiring distance
Input 3
Input
Switch State
1x1
High
(disconnected)
Closed
Ground
(disconnected)
Open
x
High
(disconnected)
Closed (both)
Ground
(disconnected)
Open (both)
1x3
High
High
Port A
Ground
High
Port B
High
Ground
Port A
Ground
Ground
Off
