4
Port 1
Port 2
4905-9929 Isolator Module
P
ort 1
P
ort 2
4905-9929 Isolator Module
4905-9929 Isolator Module
Port 2
Port 1
CKT -
CKT +
CKT -
CKT +
CKT +
CKT -
CKT +
CKT -
CKT +
CKT -
CKT +
CKT -
- CLASS A +
- CLASS A +
- CLASS A +
Notes:
1. Refer to the field wiring diagrams or the installation manual supplied with the
applicable system for detailed circuit wiring information. No more than 6 Is
Modules can be connected at any port.
2. Limit the wire resistance to a maximum value of 1.5 ohms for a closed line path in the
SLC wiring. Deviation from this limitation does not guarantee isolation for short-
circuits that are located greater than 1.5 ohms.
3. Notification Appliances are rated per individual nameplate label.
4. Maintain correct polarity on terminal connections. Do not loop wires under terminals.
5. All circuit wiring connections are supervised and power-limited.
6. Powering the Is Module from an appliance power source less than 17.6 VDC
or greater than 32 VDC may cause permanent damage to the module.
7. The TrueAlert Is Module can be operated through the TrueAlert Addressable
Controller, the TrueAlert-compatible FACP, the 4009 IDNAC Repeater or the EPS
IDNAC.
8. The Is Module counts for 4 unit loads on the TrueAlert Channel. De-rate
alarm load line voltage drop allowance by 0.06 V/amp of alarm current per Is
Module.
9. T-tapping is not allowed for Class A wiring. For Class B wiring, T-tapping is allowed.
Refer to the field wiring diagram for maximum T-tapping length.
10. The TrueAlert Is current draw is 10 mA maximum over its operating range.
Figure 3. Typical TrueAlert Is Class A Wiring
Installation instructions, Continued
TrueAlert Is
Class A Wiring
4905-9929 TrueAlert
Is Module
4905-9929 TrueAlert
Is Module
4905-9929 TrueAlert
Is Module
