Engineering Manual Introduction
15
Networker Interface Board
A Networker Interface Board (NIB) enables the maximum distance from a control panel to an
XNode, MNode, MIDNode, IDNode or keypad to be increased to 1km.
The NIB is supplied as a driver unit and receiver unit. The driver unit connects to the output of
the control panel and the receiver unit can be connected up to 1km away. A separate
remote power supply unit is required at the receiver unit.
Calculating Voltage Drop
In order for the system to work correctly, the voltage at each device must NOT drop below
10.5V (recommended above 12V) even when running on the standby battery. Standard 7/0.2
alarm cable has a resistance of 8 Ohms per 100m per core. The voltage drop is calculated
using the following formula:
V Drop = Current drawn x cable length x 0.08 x 2
The following table shows the voltage drop against the current drawn and cable length.
Current
Drawn
Cable Length (Standard 7/0.2 alarm cable)
10m 20m 30m 40m 50m 60m 70m 80m 90m 100m
60mA 0.10V 0.19V 0.29V 0.38V 0.48V 0.58V 0.67V 0.77V 0.86V 0.96V
80mA 0.13V 0.26V 0.38V 0.51V 0.64V 0.79V 0.90V 1.02V 1.15V 1.28V
100mA 0.16V 0.32V 0.48V 0.64V 0.80V 0.96V 1.12V 1.28V 1.44V 1.60V
120mA 0.19V 0.38V 0.58V 0.79V 0.96V 1.15V 1.34V 1.54V 1.74V 1.92V
140mA 0.22V 0.45V 0.67V 0.90V 1.12V 1.34V 1.57V 1.79V 2.02V 2.24V
160mA 0.26V 0.51V 0.77V 1.02V 1.28V 1.54V 1.79V 2.05V 2.30V 2.56V
180mA 0.29V 0.58V 0.86V 1.15V 1.44V 1.73V 2.02V 2.30V 2.59V 2.88V
200mA 0.32V 0.64V 0.96V 1.28V 1.60V 1.92V 2.24V 2.56V 2.88V 3.20V
220mA 0.35V 0.70V 1.06V 1.41V 1.76V 2.11V 2.46V 2.82V 3.17V 3.52V
240mA 0.38V 0.79V 1.15V 1.54V 1.92V 2.30V 2.69V 3.07V 3.46V 3.84V
260mA 0.42V 0.83V 1.25V 1.66V 2.08V 2.50V 2.91V 3.33V 3.74V 4.16V
280mA 0.45V 0.90V 1.34V 1.79V 2.24V 2.69V 3.14V 3.58V 4.03V 4.48V
300mA 0.48V 0.96V 1.44V 1.92V 2.40V 2.88V 3.36V 3.84V 4.32V 4.80V
320mA 0.51V 1.02V 1.55V 2.05V 2.56V 3.07V 3.58V 4.10V 4.61V 5.12V
340mA 0.54V 1.09V 1.63V 2.18V 2.72V 3.26V 3.81V 4.35V 4.90V 5.44V
360mA 0.58V 1.15V 1.73V 2.30V 2.88V 3.46V 4.03V 4.61V 5.18V 5.76V
380mA 0.61V 1.22V 1.82V 2.43V 3.04V 3.65V 4.26V 4.86V 5.47V 6.08V
400mA 0.64V 1.28V 1.92V 2.56V 3.20V 3.84V 4.48V 5.12V 5.76V 6.40V
420mA 0.67V 1.34V 2.02V 2.69V 3.36V 4.03V 4.70V 5.38V 6.05V 6.72V
440mA 0.70V 1.41V 2.11V 2.82V 3.52V 4.22V 4.93V 5.63V 6.34V 7.04V
460mA 0.74V 1.47V 2.21V 2.94V 3.68V 4.42V 5.15V 5.89V 6.62V 7.36V
480mA 0.79V 1.54V 2.30V 3.07V 3.84V 4.61V 5.38V 6.14V 6.91V 7.68V
500mA 0.80V 1.60V 2.40V 3.20V 4.00V 4.80V 5.60V 6.40V 7.20V 8.00V
520mA 0.83V 1.66V 2.50V 3.33V 4.16V 4.99V 5.82V 6.66V 7.49V 8.32V
540mA 0.86V 1.73V 2.59V 3.46V 4.32V 5.18V 6.05V 6.92V 7.78V 8.64V
560mA 0.90V 1.79V 2.69V 3.58V 4.48V 5.38V 6.27V 7.17V 8.06V 8.96V
580mA 0.93V 1.86V 2.78V 3.71V 4.64V 5.57V 6.50V 7.42V 8.35V 9.28V
600mA 0.96V 1.92V 2.88V 3.84V 4.80V 5.76V 6.72V 7.68V 8.64V 9.60V
Voltage Drop Table
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