FSA-PLUS Switcher (Modem Version)
Technical Manual
6341 3 103-12 - 17.05.2011
Page 16
Interface for an external switch (double or single mode)
Values for the loop resistance of the
cable
Guaranteed values over the whole
specified temperature range
Highest switching threshold:
Higher values must lead to the switch-
ing from SIDE1 over to SIDE2
(External switch is open)
R
Loop_SIDE2
300k
Lowest switching threshold:
Lower values must lead to the switching
from SIDE2 over to SIDE1
(External switch is closed)
R
Loop_SIDE1
3 k
The function of the external switch is assigned in the following manner:
External switch closed
Switch on SIDE1
External switch open
Switch on SIDE2
6.4 Interface for an Alarm Contact
The interface for the alarm consists of galvanic separated relay contacts. The con-
tacts have the function of a three-way switch.
The assignation of the contacts is as follows:
Pin 5
Pin 4
Pin 6
Alarm
Pin 5
Pin 4
Pin 6
Normalbetrieb
Alarm
Normal Operation
Picture 5:
Assignment of the alarm contacts
