Specifications

5-22
SPS IDNet Wiring
,
Continued
{xe "wiring: Class B (IDNet)"}{xe "Class B wiring: IDNet"}{xe "IDNet: wiring (Class
B)"}{xe "remote power supply (RPS): wiring (IDNet Class B)"}{xe "system power supply
(SPS): wiring (IDNet Class B)"}
To connect addressable devices/detectors to the SPS IDNet using Class B wiring, read the
following instructions.
1. Under AS 1670.1 Class B wiring is allowed only for a maximum of 40
addressable devices.
2. A ferrite bead is required on the SPS IDNet cable.
3. On TB1, jumper B+ to A+, and jumper B- to A-.
4. Route wire from the B+, B- terminals to the devices.
The illustration below shows Class B wiring.
B+ B- SHLD
IDNet
A+
P1
3
2
1
A-
IDNet LINES TO DEVICES
(CLASS B / STYLE 4)
Figure 5-12. Class B (string) Wiring
Class B (string)
Wiring
Ferrite bead
required.