Robur Roburbox100, Инструкция по установке и эксплуатации

Страница: 33 / 84

ELECTRIC INSTALLER section
Ed. 06/2014 – FW version 1.002 27
Analogue Input
For connecting the service as analogue input, we remind that the input voltage must range
between 0 and 10 Vdc.
The maximum allowable length of the connection cables to the inputs of the request
services is not less important and not to be neglected at all.
Max cable length (m) Cable section (mm²)
300 1.5
100 0.5
Given that the examples of cable length mentioned above are only two, in case of different
cable section (in any case smaller than or equal to 1.5 mm²) you can calculate the
maximum allowable length by using the following formula:
l = s × 200
where:
l = length [m]
s = section [mm²]
The cable must be shielded with the shield connected to earth at one end.
Maximum error of measurement, including the error due to the cable resistance:
± 40 mV (± 0.4% f. s.).
Connection Scheme
Figure 10
RB100: electric connection for analogue input
÷