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)
