Search Fire Alarm Questions for "SLC Loop" | Fire Alarm Resource Center

I'm getting NO POWER SUPPLY INST on my Notifier NFS2-3030. What should I check?

Quick answer: The NO POWER SUPPLY INST trouble indicates that the panel's main power supply (AMPS-24) has not been correctly identified in programming or is...

Notifier NFS2-3030Answered1mo ago9 views

What are the main differences between the NFS-3030 and the NFS2-3030?

The NFS2-3030 is an updated version of the NFS-3030 featuring increased memory and a redesigned display that includes a "Controls Active" LED and an...

Notifier NFS-3030, NFS2-3030Answered1mo ago21 views

Which Notifier intelligent detectors and modules are compatible with the NFW2-100 SLC loop?

The NFW2-100 is compatible with FireWarden addressable devices, including intelligent detectors, control modules, and monitor modules (Page 17) [1]. While the...

Notifier NFW2-100Answered2mo ago144 views

What is the maximum device capacity on the NFS2-640 in FlashScan mode vs. CLIP mode, and can you mix protocols on the same SLC loop?

In FlashScan mode, the NFS2-640 supports 318 devices per loop, consisting of 159 detectors and 159 modules (Page 8) [1]. The total system capacity is 636...

Notifier NFS2-640Answered2mo ago103 views

How do I troubleshoot a ground fault on the NFS2-640 SLC loop?

To troubleshoot a ground fault, first check the panel display to determine if the fault is internal or on the field wiring. A GROUND FAULT LOOP x message...

Notifier NFS2-640Answered2mo ago96 views

What are the battery requirements for a fully loaded NFS2-3030, and how do I size the batteries?

The NFS2-3030 requires sealed lead-acid batteries with a capacity between 7 AH and 200 AH, charged by the AMPS-24/E power supply (Page 11, 15) [1]. To size the...

Notifier NFS2-3030Answered2mo ago92 views

How do I perform a walk test on the EST4, and can individual SLC loops be isolated for testing?

The EST4 uses Service groups to perform testing on alarm input devices without placing the entire system into alarm. This allows you to isolate specific areas...

Edwards Est EST4Answered2mo ago165 views

How many addressable devices does the MXL support per SLC loop, and what is the total system point capacity?

The MXL-IQ supports up to 60 intelligent devices per analog loop (Page 12) [1]. The control panel can monitor a maximum of 4 analog loops, providing a total...

Siemens MXLAnswered3mo ago86 views

What are the key differences between the MS-9600 and the MS-9200UDLS?

The MS-9600 supports up to 636 points and uses LiteSpeed polling, while the MS-9200UDLS is a smaller panel with different electrical requirements. Key...

Fire-Lite MS-9600Answered3mo ago56 views

What is the maximum device capacity of the MS-9600 per SLC loop, and how do I add a second loop?

Each Signaling Line Circuit (SLC) loop supports a maximum of 318 addressable devices, consisting of 159 detectors and 159 modules (Page 1) [1]. To add a second...

Fire-Lite MS-9600Answered3mo ago58 views

How do I troubleshoot a ground fault on the MS-9600?

A ground fault on the MS-9600 is indicated by a steady yellow GROUND FAULT LED and a pulsing piezo sounder, signifying zero impedance between the FACP and...

Fire-Lite MS-9600Answered3mo ago62 views

What is the difference between the NFS2-3030 and the NFS2-640, and when should each be used?

The primary difference is system capacity and scale: the NFS2-640 is a modular panel supporting up to 636 devices, while the NFS2-3030 is a large-scale panel...

Notifier NFS2-3030Answered3mo ago87 views

What is the maximum SLC loop and device capacity of the NFS2-3030, and how does it expand beyond one loop?

The NFS2-3030 supports a maximum of 10 Signaling Line Circuits (SLCs) and a total of 3,180 addressable devices (Page 1) [1]. Each loop accommodates 159...

Notifier NFS2-3030Answered3mo ago193 views

How do I troubleshoot a ground fault on the NFS2-3030?

To troubleshoot a ground fault on the NFS2-3030, first identify the specific fault location indicated on the panel display. The system distinguishes between...

Notifier NFS2-3030Answered3mo ago110 views

How many addressable devices can an EST3 node support, and what cards provide the SLC loops?

An EST3 node supports up to 10 addressable device circuits per cabinet (Page 18) [4]. These signaling line circuits (SLC) are provided by the 3-SSDC1 Signature...

Edwards Est EST3Answered3mo ago92 views

What are the main differences between the NFS-320 and the NFS2-640?

The primary differences between the NFS-320 and NFS2-640 are loop capacity and physical assembly. The NFS2-640 is a modular system that supports one SLC loop...

Notifier NFS-320Answered3mo ago153 views

What is the maximum device capacity on the NFS-320 SLC loop in FlashScan mode, and what happens if a CLIP device is programmed on the same loop?

The NFS-320 SLC loop supports a maximum of 318 points, split between 159 intelligent detectors and 159 monitor or control modules (Page 34) [1]. I could not...

Notifier NFS-320Answered3mo ago75 views

How do I troubleshoot a ground fault on the NFS-320?

To troubleshoot a ground fault on the NFS-320, first identify the fault location using the onboard diagnostic LEDs and then isolate the field wiring to locate...

Notifier NFS-320Answered3mo ago81 views

What is the difference between the NFS-640 and the NFS2-640?

The NFS2-640 is the updated version of the NFS-640, featuring a CPU2-640 processor, support for high-speed networking, and compliance with newer safety...

Notifier NFS2-640Answered3mo ago71 views

How do I program devices on the NFS2-640 — can it be done from the front panel keypad without VeriFire Tools?

Yes, you can program the NFS2-640 directly from the front panel keypad using the KDM-R2 display without needing VeriFire Tools [1]. The panel supports both...

Notifier NFS2-640Answered3mo ago59 views

What is the maximum number of devices supported per SLC loop on the FlexES panel?

The FlexES panel supports a maximum of 127 bus devices per loop (Page 77) [1]. This limit applies to both esserbus and esserbus-PLus configurations and...

Esser FLEXESAnswered3mo ago70 views

What are the common trouble conditions displayed on the N16 touchscreen, and how do I navigate to view them?

Common trouble conditions on the N16 include AC Failure, Battery Low or Missing, Earth Fault, Charger Fail, and Communication Loss for SLC loops or AIO...

Notifier N16Answered3mo ago69 views

What are the common SLC loop trouble codes on the 6820, and how do I diagnose each one?

Common SLC loop troubles on the 6820 include DBL ADDR, Missing, GROUND FAULT, and SLC Loop Shorted. To diagnose these conditions, follow the specific...

Silent Knight 6820Answered3mo ago84 views

What Fenwal-compatible detectors and modules can be used on the FENWALNET 6000 SLC loop?

The FENWALNET 6000 SLC loop supports up to 255 SmartOne devices, including CPD-7052 ionization, PSD-7152 photoelectric, and THD-7252 heat detectors (Page 1,...

Fenwal FENWALNET-6000Answered3mo ago69 views

What is the correct wiring configuration for connecting SLC loop devices to the FlexES panel for Class A and Class B?

The FlexES Control panel connects SLC loop devices through esserbus modules using terminals 1 (A+), 2 (A-), 4 (B+), and 5 (B-). For Class A (Loop)...

Esser FLEXESAnswered3mo ago56 views

What is the maximum SLC loop length and device count per loop on the EST4?

The EST4 signaling line circuit (SLC) supports a maximum of 250 addresses per loop, consisting of 125 detectors and 125 modules (Page 11) [1]. While the...

Edwards Est EST4Answered3mo ago158 views

What is the maximum number of devices on the 6820 SLC loop, and how do I expand capacity with a 6815 SLC expander?

The 6820 built-in SLC loop supports up to 159 System Sensor (SK) detectors and 159 SK modules, or 127 Hochiki (SD) protocol devices (Page 1) [10]. The system...

Silent Knight 6820Answered3mo ago123 views

What is the maximum SLC loop capacity of the MS-5024, and which Fire-Lite detectors and modules are compatible?

The MS-5024 is a conventional fire alarm control panel and does not have a Signaling Line Circuit (SLC) loop; instead, it features five conventional Initiating...

Fire-Lite MS-5024Answered3mo ago89 views

What is the SLC loop wiring configuration for the FENWALNET 6000, and does it support Class A and Class B?

The FENWALNET 6000 supports both Class A and Class B wiring for its single signaling line circuit (SLC) [1]. It is compatible with Class-B, Style-4, and...

Fenwal FENWALNET-6000Answered3mo ago67 views

How do I use the JumpStart Auto-Programming feature on the Silent Knight 6820 to discover and address all SLC devices?

JumpStart is used to automatically scan and configure devices that have already been addressed and connected to the SLC loops. Note that JumpStart does not...

Silent Knight 6820Answered3mo ago62 views

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