To Next Page

To Previous Page

2 NFS-320 and NFS-320SYS UL Listing Document — P/N 52745LD:G9 5/19/2022

TB10 DC Power

• Nominal Voltage: 24 VDC, Regulated

• Maximum Current: 1.25 A DC, 1.5 A max for special applications (See Note 1)

• Maximum Ripple Voltage: 176 mVrms

• Class B wiring. Supervise with a power supervision relay EOLR-1

• Ground Fault Impedance: 0 ohms

• Supervised

• Supported by battery backup during AC power loss

• Power-limited (Class 2)

• Resettable and Non-resettable power available.

TB11 EIA-485 Terminal Mode & ACS

Mode Connection

• Characteristic. Impedance: 120 ohms

• Supervised

• Power Limited (Class 2)

TB12 EIA-232 Printer/PC/CRT

(Terminal) Connection

• Power Limited (Class 2)

• Not Supervised

• Equipment must be located in the same room within 20 feet of the panel with cables encased in

conduit.

TB13 SLC Loop

• Voltage: 24 VDC nominal voltage, 27.6 VDC maximum voltage

• Maximum Current: 200 mA average (short circuit will shut down the circuit until the short is

fixed). For battery calculations use 200mA.

• Wiring Configuration: Class A or B

• Maximum Length: 12,500 ft (3810 m) total loop length Class A and B

• Maximum Resistance: 50 ohms Class A or B

• Device Capacity: 01- 159 Intelligent Detectors, 01 -159 Monitor/Control Modules

• Maximum Capacitance: 0.5 µF for all SLC wiring

• Ground Fault Impedance: 0 ohms

• Supervised

• Power-limited (Class 2)

J1 Network/Service Connection

(NUP)

• Power Limited (Class 2)

• Supervised

J2 USB A - VeriFire Tools

Connection

USB connection for VeriFire Tools communication to the panel (Mini AB)

J3 USB B - VeriFire Tools

Connection

USB connection for VeriFire Tools communication to the panel (Standard B)

J4 LEM-320 Connector Not Used

J5 Security Tamper Switch Connection for a Security Tamper Switch (STS-200 for the NFS-320, STS-1 for the NFS-320SYS)

J6 Auxiliary Trouble Input Trouble monitoring connection for auxiliary equipment

J7 KDM-R2/C Connection Connection for the addition of the KDM-R2/C display

J8 Zone Coder Connection Connection for the UZC-256 Zone Coder

Notes:

1. Total current drawn from the power supply by TB2, TB6 through TB9 and TB10 cannot exceed 3.0 A in standby or 6.0 A in an alarm condition. The

Control Panel provides a total of 4.4 A of power in standby and 7.4 A of power in alarm to be shared by all internal circuitry and external provisions

(24 V resettable and non-resettable).

2. Refer to the Notifier Device Compatibility Document for a list of Notification Appliance Circuits and Releasing Circuits. Refer to Table 12 for SLC

devices that are compatible with the NFS-320.

3. Refer to the Section 6, “Compatibilities” for a list of external accessories that are compatible with the NFS-320.

Terminal Block/

Connector

Description Specifications

Table 1 CPU Wiring Connections (2 of 2)