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CASBB394, FXN557, MASB890, CASBB394-0

VAD Base (Open Category)

Effective January 2020

Installation Instructions

INSTALLATION INSTRUCTIONS

   25-12407-G  January 2020

16

2831

DoP0418

DoP0419

Specification

Supply Voltage

19 – 30 Vdc

Cable Size / type

0.5 - 2.5mm/ FIRETUF, FP200 or MICC

Standby current

< 450 uA

Operating temperature

-10 to +55 °C (95%RH)

Sound output @ +/-3d8 

(set by panel)

Low volume : 83dB @ <8.6mA (258mW max)*

Medium volume : 90dB @ <10mA (300mW max)*

High volume : 93dB @ <11mA (330mW max)*

Environment Category

Type A / IP21C

Compliance

EN54-3 Fire Alarm Device - Sounder

EN54-17:2005 Short Circuit Isolators

EN54-23:2010 Fire Alarm Devices - Visual Alarm 

Devices VAD

Tones (set by panel)

Continuous 910Hz

Pulsed 910 / 0Hz pulse 1Hz***

Two Tone 610 / 910Hz @ 1Hz cycle

Slow whoop 500-1200Hz in 3.5 seconds / 0.5secs 

gap

Beacon

Flash 0.5Hz, Category O VAD 

(for coverage details see page 2)

Short circuit isolators

Each of the sounder beacons in this range contain an integral 

short circuit isolator, which operates between the - VE COM IN 

terminal and the -VE COM OUT terminal. (see base wiring 

diagram overleaf).
The isolator operates in conjunction with Eaton Control Panel 

when a low parallel resistance fault of typically 200 is presented 

between the +VE and -VE of the loop wiring.

Short circuit isolation data (integral with each sounder beacon)

Total Loop Resistance for correct operation of short 

circuit isolator

50 (max)

Parallel Fault Resistance to be seen at the Control Panel for 

isolators to be open

200 (typ)

Continuous Current allowable through isolator

1A (IC max)

Isolator resistance in closed state

0.26 (max)

Maximum leakage current in the isolated state

14mA (max)

Voltage at which isolator changes from open to closed state 11V (max) 3.8V (min)
Voltage at which isolator changes from closed to open state 11V (max) 3.8V (min)
Maximum switching current of isolator

1.5A

Order Codes

CASBB394, FXN557, MASB890

Loop Mounted Sounder/VAD

CASBB394-O

Loop Mounted Sounder/VAD Open Protocol

CASC

Cover for Sounder Base (5 Pack)

*  Includes VAD
** Polar dispersion information available in the Technical 

manual (Ref:M16-003). For signal protocol refer to Eaton 

communication protocol document. For the table of essential 

characteristics refer to DoP.
*** Not EN54-3 Approved

EN54-3:2001+A1:2002+A2:2006

EN54-17:2005

EN54-23:2010

714q/03

714q/04

(i) Knock-Out the required fixing holes

(ii) Fix to mounting surface using

two suitable screws

If the base deforms on an uneven

surface, loosen the screws or move

to a more flat position.

(i) Clip Sounder onto base

If sounder needs to be removed

use a small screwdriver to unclip

Do not bring excessive cable into

the sounder/beacon as this can

interfere with the fitting of the

detector, keep cable tails to

a minimum.

Fit the locking tab into the square hole 

on the sounder.

Finish assembly as stage 5.

Remove by inserting a

suitable tool (eg screwdriver)

into the hole in the detector / 

cover, the rotate detector / 

cover anti-clockwise.

WARNING Do NOT use high

voltage testers if ANY equipment

is connected to the system.

Earth screen must be continuous

along entire length of loop.

Locking tab 
release hole

1.67

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