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To connect the IDNet card to devices using Class B wiring, read the following
instructions.
1. On TB1, jumper IDNetB+ to IDNet A+, and jumper IDNetB- to IDNetA-. If the
jumper is absent, a Class A Trouble will be indicated on LED 2.
2. Route wire from the IDNetA+, IDNetA-, (or B+, B-) outputs on TB1 of the
IDNet card to the first device, then on to the following devices.
3. Up to 40 devices maximum.
4. Sounder bases or 6 Point I/O modules in separate zones may not be wired in
Class B (string).
The illustration below shows Class B wiring.
+
1
2
1 21212
Figure 6-5. Class B (string) Wiring
Note: Maintain correct polarity on terminal connections. Do not loop wires
under terminals.
Wiring to IDNet Devices, Continued
Class B Wiring
IDNET CARD
IDNET DEVICES
0.75 mm
2
and 4 mm
2
FERRITE BEAD (see fig 5.1)