Table of Contents
Advertisement
Appendix E: NFS2-640, NFS-320 (UL 9th) and NFS-640 Systems (UL 8th)
E.1 Capabilities
ACS annunciators communicate with the control panel on the ACS Mode interface: TB11 on the CPU-320 or CPU2-640, TB13 on the CPU-
640. The ACS Mode interface can annunciate control panel, zone, detector, module, and circuit status. The 832 panel annunciation points are
divided into 13 fixed ACS Selection Groups (labeled A to M) of 64 points; these are detailed in the panel's programming guide (see
Section 1.3, "Related Documentation" for part numbers). There are also ten programmable annunciator groups which are programmed using
VeriFire® Tools software. You can assign each ACS Selection Group to one or more of the 32 annunciator addresses supported by the con-
trol panel.
This fire alarm control panel can use ACS annunciator addresses 1–32 without a UDACT and ACS annunciator addresses 1–19 with a
UDACT. Up to 32 devices can be driven by the EIA-485 communications output, all addresses combined. Two-way communications can
occur with only one annunciator per address; other devices on the same address must be configured as "Receive Only".
Use the ACS Mode Interface to remotely use control panel functions (Acknowledge, Alarm Silence, Alarm Activate, and System Reset)
from a remote location. The ACS Mode interface can also activate NACs, panel circuits, and control modules from remote locations.
E.2 NFS2-640 and NFS-320 Connections: EIA-485 Circuit and Power
The EIA-485 connections are made to TB11 on the CPU2-640 or CPU-320 as shown. 24 VDC power-limited non-resettable power for the
LDM is available from TB10 on the CPU2-640 or CPU-320. Do not use the two pins on TB7 marked "resettable".
For more information on annunciator operation and FACP programming under various specific applications, refer to the NFS2-640 and
NFS-320 documents referenced in Section 1.3, "Related Documentation".
E.3 NFS-640: EIA-485 Connection
EIA-485 wiring is connected to TB13 of the NFS-640 as shown in the accompanying illustration.
See Section 4.3, "EIA-485 Wiring Specifications" for details and notes about EIA-485 requirements.
E.4 NFS-640: Power Connection
NFS-640 panels have an integral on-board power supply. The annunciator's power supply is connected
to TB7 of the control panel as shown in the accompanying illustration. No more than 1.25A can be
drawn from these power-limited terminals in standby or alarm.
The power run to the annunciator does not require a Power Supervision Relay. Loss of power is inher-
ently supervised through a Communications loss. This 24 VDC output is supervised, power-limited, fil-
tered, and non-resettable.
ACS Manual — P/N 15842:N3 5/4/2022
24 VDC Power (+)
Common (-)
not for use with
annunciators
TB10
CPU2-640/CPU-320
EIA-485 (+)
EIA-485 (-)
TB11
24 VDC
TB7 on NFS-640
TB13 on
NFS-640
41
Advertisement
Table of Contents
