8
Up to 250 IDNet slave devices, such as smoke detectors and pull stations, can be connected to the
IDNet card. Class A or Class B wiring can be used to connect the IDNet card to peripherals.
IMPORTANT:
You must use the 4100-3106 IDNet card when installing Quick Connect
devices.
Class A wiring allows IDNet appliances to communicate with the IDNet card even in the event of
an open circuit somewhere in the loop. Class A wiring requires that two wires are routed from the
IDNet card to each IDNet appliance, and then back again to the IDNet card.
Class B wiring allows “T” tapping, and therefore requires less wiring distance per installation than
Class A. IDNet wiring does not require end-of-line resistors, because each IDNet device
communicates directly to the IDNet card.
Review these guidelines before wiring the IDNet card.
•
Refer to 4100 Field Wiring Specification Document 900-242 for further information.
•
All wiring is shielded, 18 AWG (minimum) to 12 AWG (maximum). Refer to Table 3,
below, for specifications on each type of wire.
Table 3. IDNet Card Wiring Lengths
Wire Gauge
Maximum Distance
18 AWG
7.14 Ohms/10,000 ft
16 AWG
4.59 Ohms/10,000 ft
14 AWG
2.82 Ohms/10,000 ft
12 AWG
1.77 Ohms/10,000 ft
•
All wiring is supervised and power-limited.
•
IDNet communications power is 36.25 V (maximum) at 0.5 A, 3333 BPS.
•
All wiring that leaves the building requires overvoltage protection. Install module
2081-9044 wherever wire enters or exits the building. A maximum of four 2081-9044
Modules may be connected to one channel. The maximum line distance with two
suppressors is 2500 feet. With an additional two suppressors, the maximum line distance
is 1500 feet.
•
For Style 4 operation:
- The maximum distance to any device is 10,000 feet or 40 Ohms.
- “T” taps are allowed.
- The total distance for one IDNet line is 10,000 feet.
- Maximum allowed line-to-line capacitance (“+” to “-” terminals) is 0.60
μ
F. For
applications with shielded wire, be sure that the total capacitance from line to line plus
the shield to either line is no more than 0.60
μ
F.
•
For Style 6 operation, the maximum loop distance is 2500 feet. “T” taps are not allowed.
•
Loop wires once through the supplied ferrite bead(s) as shown in Figure 3.
Continued on next page
Step 3. Wiring to IDNet Peripherals
Overview
Guidelines
Figure 4.
The Ferrite Bead
Summary of Contents for 4100-3101
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