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PX Version 5.0 - QX/RX Version 4.51 Installation Manual – Issue F
- 16 -
Technical Specification
Technical Specification
Environmental
Parameter Range
Temperature range -10 to 50 °C
Humidity 10% to 90% relative humidity
Technical Specification
Cable Type
The system has a 4-wire bus for all peripherals. The recommended cable type is 7-strand/0.2mm
2
diameter un-screened cable, which has a resistance of 90 ohms/km and a core to core capacitance of
85nF/km. The screened cable referred to in this manual has a capacitance of 68nF/km and a
resistance of 39R/km. If screened cable is used it should be terminated in the control panel and
connected to earth. Refer to the section on user interfaces and concentrators for details of the
maximum length of cable on each bus.
Technical Specification
Cable Length
The maximum length, with a single standard keypad connected at the end of the cable and no other
peripherals connected on the data bus, is shown in the table.
Maximum Data Bus Cable Length (m)
Power Source Un-screened Cable Screened Cable
Control Panel 600m 1900m
Local Aux. PSU,
with single 0v core
1700m 2500m
Local Aux. PSU,
with 2 0v cores
1900m 2500m
If auxiliary PSUs are used then all 0v connections must be
connected to the control panel 0-
volt terminal. It is not recommended practice to share a sensor connection and the data bus
connections in the same cable.
Technical Specification
Operation Voltage
The operating voltage range of all XiB components is shown in the table.
Parameter Minimum Typical Maximum
Voltage (volts) 10.5 v 13.5 v 14.7 v
Voltage (Volts) Condition
> 11.7 Battery OK
11.4 Low Volts
10.7 Power Fail
< 10.6 Deep discharge
16


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