Installation
137
Mitel SMB Controller
syd-0657/2.0 – R6.0 – 09.2018
If an FXS interface is configured as a control output, the signal can be used to control
external devices or equipment (e.g. heating, alarm or outdoor lighting systems).
The no-load voltage is 24 VDC; the current is limited to 25 mA. A connected relay must
be of the type 24 VDC and must not draw more than 300 mW in power.
There are no special requirements for the cables.
If FXS interfaces are configured as control inputs, one or more of the switch groups
can be switched between Positions 1, 2 and 3. An external switch or a relay is con-
nected for this purpose. An LED can be connected to the circuit to indicate the switch
state. The no-load voltage is 24 VDC; the current is limited to 25mA.
The permissible switch and loop resistances are as follows:
• Active state (On): < 1 k
Ω
• Passive state (Off): > 4 k
Ω
There are no special requirements for the cables.
Fig. 55
Connection for FXS mode: Control input
In the switch group configuration in (
=xb
) the ports are assigned to the control inputs
of a switch group. To be able to control all 3 switch positions of a switch group, you
need 2 control inputs which switch the switch position of the switch group depending
on the status.
CAUTION
!
Control outputs must have a floating connection.
CAUTION
!
Control inputs must have a floating connection.
a
b
24 VDC
25mA
FXS interface
