4RF Aprisa SR+ - Hardware Alarms Interface; Protection Switch Specifications

Specifications | 485
Aprisa SR+ User Manual 1.11.1
Hardware Alarms Interface
The hardware alarms interface supports two alarm inputs and two alarms outputs.
Alarm Inputs
The alarm connector provides two hardware alarm inputs for alarm transmission to the other radios in the
network.
Interface
RJ45 connector
Detector type
Non-isolated ground referenced voltage
detector
Detection voltage - on
> +10 VDC
Detection voltage - off
< +4 VDC
Maximum applied input voltage
30 VDC
Maximum input current limit
10 mA
Alarm Outputs
The alarm connector provides two hardware alarm outputs for alarm reception from other radios in the
network.
Interface
RJ45 connector
Output type
Non-isolated ground referenced open
collector output
Maximum applied voltage
30 VDC
Maximum drive current
100 mA
Overload protection
Thermally resettable fuse
Protect Interface
The Protect interface is used to connect the radios to the protection switch within a Protected Station. It
is not a customer interface.
Protection Switch Specifications
RF Insertion Loss
< 0.5 dB (switch and connecting cables)
Remote Control inputs
Logic 4700 ohms pullup to +3.3 VDC