Determining System Limits - Bosch FPE-7039 Manual Del Usuario

16 en | Wiring
4 Wiring
You can configure the FPE‑7039 with a single fault tolerant
Class A loop or as a pair of supervised Class B branches. For
programming information, see the FPD‑7024 Installation and
Operation Guide (IOG).
4.1

Determining system limits

Notice!
Do not use shielded wire. Twisted-pair wire is not
recommended, but is acceptable if wire length is reduced by
50%.
Notice!
In the following graphs,
a) data points falling in the light area are acceptable.
b) data points falling in the middle area depend on your
configuration. They must be verified with the battery calc
table.
c) data points falling in the dark area require changes in wire
length or size, number of devices, or configuration.
1.
2.
3.
2016.10 | 1.0 | F.01U.330.684
Find the intersection of the desired number of devices and
wire length/resistance you want on the first graph below.
If the data point falls in the light area, note the available
wire sizes (AWG or ISO) for your installation. Then go to the
next step.
If it does not, see the Notice above.
Look up the capacitance for the specific wire size/length/
type.
Check the intersection point of the capacitance and
number of devices on the second chart below. If the data
point falls in the light area, your choices are acceptable. If
not, see the Notice above.
MUX expansion module
Bosch Security Systems. Inc.