User Manual

Axell BSR 3308-PS NFPA
Product Description and User’s Manual
22 Doc PN 4000004131 Rev. 2.7 © Axell Wireless Ltd
3.10.2 Alarm Connector Pinout
Each alarm status is recognized by a separate wire-pair, where the colored wires are
internally connected with a 4.7 K ohm resistor (serves as a pull up resistor to +5V. The
following figure shows the Alarm connector pinout.
Figure 3-9. Alarm Connector Pinout
Pin No.
Signal Name
Wire Colour
1 External Alarm #1 Black
2 External Alarm #2 Red
3 Dry Contact VSWR Alarm (Normally Closed)* White
4 Dry Contact Summary Alarm (Normally Closed)** Green
5 GND for External Alarm Orange
6 Dry Contact Antenna Malfunction (VSWR) Alarm
(Normally Closed)*
Blue
7 Dry Contact Summary Alarm (Normally Closed)** Brown
*Dry Contact VSWR alarm connection is supported by a pair of wires (3,6).
**Dry Contact Summary alarm connection is supported by a pair of wires (4,7).
3.10.3 Load Restrictions
3.10.3.1 Alarm Dry Contact Output Restrictions
• Maximum switching voltage: 220 VDC, 125 VAC
• Maximum switching current: 2A
3.10.3.2 External Alarm Input Restrictions
• Maximum repetitive reverse voltage: 28 V
• Impedance load: 470 Ohm
“0” -
0V
“1” -
3.8V - 28V