Tyco 4100U installation manual Power Supply Wiring Distances, 3.Class B Wiring

Class B NAC Wiring	To connect the SPS to appliances using Class B wiring, read the following instructions
	and refer to the figure below.
	1.	Route wire (between 0.75 mm2 and 4 mm2) from the B+, B- outputs on TB2 of
		the SPS to the appropriate inputs on a peripheral notification appliance. Use
		NAC1, NAC2, or NAC3, as configured.
	2.	Route wire from the first appliance to the next one. “T” tapping is not allowed.
		Repeat for each appliance.
	3.	Route wire from the last appliance to the supplied EOLR or a 4081-9008 EOL
		Harness (10 K Ohm, ½ W; brown/black/orange).
	4.	Repeat steps 1 through 3 for each NAC output you want to use.
	5.	Leave the 378-030 EOL Resistor (10 K Ohm, ½ W; brown/black/orange) on
		each unused circuit. The circuit must connect “B+” to “B-” terminals.
	6.	If the appliance/device to be used does not have an integral diode, a blocking
		diode must be fitted between the incoming +ve wire and the +ve terminals of the
		device with cathode to the device.

The illustration below shows Class B wiring.

Important: Conductors must test free of all grounds.

0.75 mm2 to 4 mm2

Ferrite bead required for CE

4081-9008 EOL Harness

	10K 1/2W (133-894)
RED	RED	BLK
	TYPICAL
	APPLIANCE
RED	RED	BLK
	TYPICAL
	APPLIANCE
RED	BLK	BLK
	NAC2	NAC3

Leave the 378-030 EOL Resistor (10 K Ohm, ½ W; brown/black/orange) on unused B+/B- terminals

compliance. Use SX0005 or kit 4100-5129.

3

2P1

1

B+ B- A+ A- B+ B- A+ A- B+ B- A+ A-

NAC1 NAC1 NAC1

LED1 LED2 LED3

Figure 7-3. Class B Wiring

Power Supply Wiring Distances

Overview	Before wiring from any type of power supply to notification appliances, check Tables 7-1
	and 7-2 for wiring distances.
	7-5