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To connect the SPS to IDNet appliances using Class B wiring, read the following instructions.
1. On TB1, jumper B+ to A+, and jumper B- to A-. If the jumper is absent, a Class A Trouble
is indicated on LED 5.
2. Route wire (between 12 [3.309 mm
2
] and 18 AWG [0.8231 mm
2
]) from the A+, A-, and
SHIELD outputs on TB1 of the SPS to a junction box. Begin “T” tapping at the junction
box. The maximum distance between the SPS and the last IDNet appliance is 2,500 feet
(762 m) for 250 devices, or 4,000 feet (1,219 m) for 127 devices. For IDNet circuits, the
total allowable distance for cables is 10,000 feet maximum or 0.58 µF line-to-line
capacitance, including all “T” taps.
The illustration below shows Class B wiring.
B+ B- SHLD
IDNet
A+
P1
3
2
1
A-
DNet LINES TO DEVICES
(CLASS B / STYLE 4)
Figure 11. Class B Wiring
Notes:
Notification appliances are rated per individual nameplate label.
Maintain correct polarity on terminal connections. Do not loop wires under terminals.
IDNet Field Wiring (SPS only),
Continued
Class B Wiring
Ferrite bead
required
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