Appendix H: Nca Systems (Ul 8Th); H.1: Capabilities; H.2: Connecting The Eia-485 Circuit; H.3: Providing Power To Annunciators - Honeywell NOTIFIER ACS Series Manual

Annunciator control system

Table of Contents

For NCA-2 connections, see Appendix I.

H.1 Capabilities

ACS annunciators communicate with the control panel on the ACS Mode interface (TB3 on the NCA). Annunciators can be programmed to

annunciate the status of addressable devices, software zones, system control functions or shadowing ACS points mapped to an

AM2020/AFP1010. The NCA supports up to 96 points per annunciator address. The ACS devices can be programmed as either 64 or 96

points depending on which ACS series is being used. 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 config-

ured as "Receive Only".

H.2 Connecting the EIA-485 Circuit

EIA-485 wiring is connected to TB3 of the NCA (ACS Mode interface) as shown in the accompanying illustration.

See Section 4.3 for details and notes about EIA-485 requirements.

H.3 Providing Power to Annunciators

The annunciator's power supply is connected to +24V non-resettable power on TB1 of the NCA; any of the three

positive terminals and three negative terminals can be used to connect power to the ACS. A typical configuration is

shown in the accompanying illustration.

The current which can be drawn from these power-limited terminals depends on which supply is being used to

power the NCA; the annunciators may also be powered directly from the power supply that is powering the NCA,

using the power-limited non-resettable 24VDC terminal. (See the NCA Manual for details.)

The power run to the annunciator does not require a Power Supervision Relay. Loss of power is inherently super-

vised through a Communications loss. This 24 VDC output is supervised, power-limited, filtered, and non-resetta-

ble.

H.4 Programming the NCA for Remote Annunciation

NOTE: Annunciator points must be programmed from the NCA before the annunciators will function. To program the annunciators into NCA

memory, and to map system points and software zones to annunciator points, refer to the NCA Manual. The NCA employs the following format

for annunciator points:

Annunciator address

In the range of 1-32, as set

on the annunciator's rotary

decimal switches.

NOTE: When using the NCA to annunciate points on the AM2020/AFP1010 over the network, enable state reporting in the AM2020/AFP1010

panel for control module points and "NONA"/"NOA" module points; refer to the NCA Manual for instructions.