Edwards 3-ASU User Manual

© 2013 UTC Fire & Security. All rights reserved. 1 / 6 P/N 270482 • REV 06 • REB 18JAN13
3-ASU and 3-ASU/4 Audio Source Unit
Installation Sheet
Description
The 3-ASU and 3-ASU/4 provide controls for emergency
paging. The 3-ASU/4 also provides a four-slot rail for installing
local rail modules.
Both units can store and play back prerecorded messages and
have inputs for connecting remote microphones and MN-FVPN
VoIP Encoder/Decoder modules.
The 3-ASU and 3-ASU/4 require one chassis space in an
enclosure. The 3-ASU includes a filler plate that mounts on the
cabinet inner door to prevent access to the electronics.
Installation
WARNING: Remove all sources of power from the cabinet
before installing or removing components. Failure to do so may
result in serious injury or loss of life.
1. Attach the chassis to the backbox using the hardware
provided. Align the backbox mounting studs with the holes
indicated in Figure 1.
2. Attach the ASU to the chassis using six 6/32 x 3/8 pan
head screws. Press the RCIC card onto the PEM studs.
See Figure 2.
3. Connect the ribbon cable (P/N 250195-01) between the
ASU card and the RCIC card.
4. If used, install the 3-ASUMX memory card. Make sure the
write protect switch is in the “off” or “write enabled”
position.
5. Connect the RCIC card to the other chassis rail
assemblies. See Figure 6 or Figure 7.
6. Plug the ribbon cable (P/N 250194-00) from the 3-ASU
cover assembly into J3 on the ASU card. See Figure 3.
7. Lift the 3-ASU cover assembly onto the chassis mounting
studs then attach it with the locknuts provided in the
hardware kit. See Figure 4.
Figure 1: Chassis mounting diagram
Note: 3-ASU/4 chassis shown.
Figure 2: Circuit board mounting diagram
Note: 3-ASU chassis shown.

Edwards 3-ASU Specifications

General

Brand	Edwards
Model	3-ASU
Category	Control Unit
Language	English

Summary

Description and Features

Product Description

Details the 3-ASU and 3-ASU/4 units for emergency paging, message playback, and module installation.

Installation Procedure

Chassis and Component Mounting

Steps for attaching the chassis, ASU, RCIC card, and cover assembly, including screw and cable connections.

Memory Card Installation

Instructions for installing the 3-ASUMX memory card and setting the write protect switch.

Wiring Instructions

ASU Card Wiring Diagram

Diagram illustrating connections for the ASU card, including RS485, audio data, telephone, and remote inputs.

RCIC Card Wiring

Wiring diagrams for connecting RCIC cards across multiple chassis rails and to audio outputs.

Specifications

Electrical and Physical Specifications

Details voltage, current, wire size, dimensions, mounting, audio channels, and operating environment.

Contact Information

Support Website

Provides the website address for additional contact information and support resources.