Idnet Section Overview; Device Addressing, Class A And Class B - Simplex 4007-9101 Installation Manual

6.3 IDNet Section overview

The power supply provides an isolated IDNet channel. This section is compatible with IDNet communicating initiating devices and enables the system
CPU to communicate with up to 250 peripheral devices, such as smoke detectors and pull stations.
Specifications
Table 22: IDNet specifications
Supports:
Electrical specifications:
Channel voltage
to remote devices
Earth detection threshold:
Circuit requirements:
LEDS:
For detailed information on LEDs troubleshooting, refer to Figure 21: SLC channel trouble LED codes on page 27Figure 22: System trouble LED
codes on page 28 in the Troubleshooting section.

6.4 Device addressing, Class A and Class B

The IDNet section can be wired as a Class A circuit or a Class B circuit.
Class A wiring: Class A wiring provides an alternate communication path that maintains communication to all devices when a single open circuit fault
occurs. Class A wiring requires two wires to be routed from the IDNet Primary Terminals (B+, B-) to each device, and then back to the IDNet Secondary
Terminals (A+, A-). Wiring is in/out, and T-tapping is not permitted.
Class B wiring: T-tapping is permitted on Class B wiring. IDNet wiring is inherently supervised due to individual device level communications. EOL
resistors are not required.
• If there are no remote isolators or isolator bases on the loops, device addressing can be assigned without concern for sequence.
• If there are remote isolators or isolator bases on the loops, the required addressing approach is to start from the B side and assign each
successive isolator a higher address than the isolator it precedes.
• For Class B wiring only, the A output and B output on a loop are connected in parallel using a jumper.
Page 30
Fig 23: IDNET on the power
supply
Up to 250 addressable IDNet devices and up to 43 coded piezo sounders may be coded by the IDNet
channel. Base panel supports 100 points, with 75 additional points per additional IDNet+ Loop Expansion
Module (refer to manual 579-1106).
30 VDC (normal); 35 VDC Alarm.
Data rate is 3333 bps.
Output circuits are supervised and power-limited.
10k ohms minimum from either positive or negative terminals.
Refer to Table on page 12 for the IDNet current on a NAC power supply. Refer to Table on page 18
for the IDNet current on a IDNAC power supply.
4007ES and 4007ES Hybrid Fire Alarm Systems Installation Manual
579-1102 Rev H