Digital:
- Maximum bus length without application of a CP45ARP with external power supply is limited to
300 meter.
- Maximum bus length with application of CP45ARP with power supply is 600 meter.
- Maximum distance from APM1xx to ARJ03P is 3 meters, should be deducted from total bus
length.
Connected device limits
- Maximum allowed number of APM1xx’s with external power supply can go up to 9 units.
- Maximum allowed number of APM1xx’s with any individual data bus can go up to 9 units.
Power supply calculation
The maximum current which can be drawn over the twisted pair cabling is 0.6 Amps. Depending
of the number of connected devices junction boxes should be placed in such way, resulting in
a current which doesn’t exceed this limit. The tables on page 22 shows the maximum current
ratings for connectable devices, indicating the maximum cable length in function of connected
devices.
A simplified method allows calculation of the maximum cable length, in function of the number of
connected devices: L = 300 / X (X is the number of connected devices)
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