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MSA4H/V: 4 Button Wall Switch V1.0  

          

  

Overview

1) Output and macro control buttons
2) Button lights
3) Button label window and label lights
4) Multibus feedback LEDs
5) Label trays
6) 4-wire Multibus connection

   

Wiring

Connecting an MSA4H/V

LED Feedback

Description

The MSA4H/V is designed to work with the Imperial system’s 
MAMA home automation engine. Each button can be 
programmed to control a single output, multiple outputs, or 
macros. The wall switch can provide on/off control of lights, 
sprinklers or macros, set lights to a fixed dimming level, or 
open motorized shutters to a preset height. 

All wall switches are driven by the V32 Main Controller’s 4 wire 
low-voltage Multibus. This means that the high voltage wiring is 
not connected directly to the switch as in regular electrical 
systems. Since the wall switches use low-voltage bus 
communication, they can be installed anywhere including wet 
areas or outdoors (avoiding direct sunlight, or exposure to rain/
snow). 

Up to 510 wall switches can be programmed to control one 
output, as opposed to a maximum of 3 switches or 1
dimmer knob in regular electrical systems. 

Features

4 buttons to control outputs (lights, sprinklers, shutters, 
etc.) or macros (group of outputs)

Multiple switches can control the same output (max. 510)

Custom designer colours available

Set in Toggle mode (1 button on/off) or Switch mode (1 
button on / 1 button off)

Adjustable Day/Night LED brightness

Remote firmware upgrade via Multibus using RS485 at 
57.6Kbps

All programming is done using BabyWare PC Software

Bi-directional Module Locate feature

Connects to Multibus: 4-wire encrypted 13.8 VDC

communication bus

Single gang box installation (for dimensions, refer to 

Specifications

)

TM

MSA4H (horizontal)

MSA4V (vertical)

NOTE:

 For more detailed installation and programming 

instructions, refer to the Imperial System Guide.

1

6

2

5

3

4

Specifications

Multibus rating

13.8 VDC Class 2; 35 mA

Dimensions

7.4 X 11 X 2.5 cm (2.9 X 4.3 X 1 in.)

Operating 
temperature

-10ºC to 50ºC 
(14ºF to 122ºF)

Imperial 
Multibus

WARNING:

 To avoid damage when 

installing and servicing, observe 
proper ESD precautions.

NOTE:

 Wiring methods must be in 

accordance with the National Electrical 
Code ANSI/NFPA 70.

     = Off

R = Red   G = Green  B = Blue 

     = On

      = Flashing

MULTIBUS

OK: Communication in 
progress

Com fail: GRN/YEL reversed

Bus power too low

Module Locate mode

G

G

BUS

RX

TX

G

G

RX

TX

BUS

R

BUS

RX

TX

R

Com fail: GRN/YEL short / 
no data / Multibus in 
RS485 mode

BUS

RX

TX

R

G

RX

TX

BUS

R

Com fail: too many 
modules / wrong data

G

G

RX

TX

BUS

R

Firmware upgrade in 
progress

Button 1 
LED

Rapid flash

NOTE:

 “BUS” LED may be labeled “ERR” on some hardware versions.

BUTTONS

Press to activate/deactivate the button’s 
associated output or action (refer to 

Programming an MSA4H/V Wall Switch

 

in the Imperial System Guide).

Button activated

Button deactivated

R

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