xGenConnect Installation and Programming Guide
23
Detector EOL Wiring
Other than the 3K3 end-of-line resistor support, the xGenConnect Grade 2
panels support the following end-of-line resistor value combinations in ohm (*):
Combination
A
B
C
Tamper (short)
0
0
0
Normal
3.3
kΩ
4.7
kΩ
4.1
kΩ
Alarm
6.6
kΩ
9.4
kΩ
8.2
kΩ
Tamper (open)
∞
∞
∞
(*) Refer to the detector installation manual for EOL values and wiring instructions.
Power Requirements
The xGenConnect intrusion panel family is designed to be used with a 16 VAC
1.5 A (NXG-4, NXG-8, NXG-8E), 20 VAC 1.5 A (NXG-9), 35 or 40 VA
transformer which is included with xGenConnect panel kits. This transformer
includes a 500 mA 250 VAC fast blow replaceable fuse on the terminal block. If
more current is required, add NXG-320 Smart Bus Power Supplies.
Cable Requirements
The system RS-485 communication bus is used to connect keypads and in- and
output expanders to the xGenConnect intrusion panel.
• For cable specifications, see “xGenConnect Specifications > xGenConnect
Cable must provide:
>= 13 twists per metre or >= 4 twists per foot,
<= 52 pF per metre or <= 16 pF per foot,
and characteristic impedance 100 to 120
Ω.
• 800 m total cable run on system.
• Max. 800 m from remote device to xGenConnect control panel.
• Max. 32 devices plus panel.
• Max. 16 keypads, as part of the 32 device limit.
Grounding
All devices designed for the system have earth connections via metal studs to
the metal housing. Make sure that these metal studs make good connection to
the housing (beware of paint). The earth connections of every piece of equipment
in the system can be used for connecting the screen of shielded cables.
If a device is placed in a plastic housing the earth lug of the device does not have
to be connected.
In one building several cabinets or devices are earthed to a safety ground. The
safety ground for the building must be checked by a licensed contractor.