Chamberlain  Wireless Keypad C840

Free Standard Delivery Australia-wide only 


  • Chamberlain C840 Garage Door Keypad
  •  9v Alkaline Battery
  •  Screw Pack
  • Instruction Manual 

Warranty -  01 year manufacturer's warranty (This warranty covers failure due to manufacturer's fault)

Chamberlain Garage Door Keypad Compatibility

This Merlin C840 garage door keypad will suit the below garage door and gate motors. Please note, this is only compatible with older Merlin motors that do not use Security+ 2.0 encryption, including the new Steel-Line & Merlin motors with “EVO” & “MYQ” in their model numbers.

Compatible/ Merlin Roller Door Openers

CR550 Roller Door Motor
HE60R Roller Door Motor
MR60 Roller Door Motor
MR600 Roller Door Motor
MR600a Roller Door Motor
MR650 Roller Door Motor
MR800 Roller Door Motor
MR800a Roller Door Motor
MR850 Roller Door Motor
MR1000 Roller Door Motor
MJ3800R Jackshaft Roller Door Motor
MRC950 Light Industrial Roller Door Motor


Compatible Merlin Sectional Door Openers

HE60 Sectional Door Motor
MT60 Panel Door Motor
MT60P Panel Door Motor
MT600 Panel Door Motor
MT800 Panel Door Motor
MT1000 Panel Door Opener
MJ3800 Jackshaft Panel Door Opener
MT3850 Panel Door Motor
MT5580 Sectional Door Opener
MT5580P Panel Door Motor
ML700 Sectional Door Opener
ML750 Sectional Door Opener
ML850 Sectional Door Opener


Compatible Merlin Gate Openers

MGS300 Gate Operator
MGA300 Gate Operator
MGS400 Gate Operator
MGS500 Gate Operator
MGS1000 Gate Operator
HC100ML Gate Operator
HC300ML Gate Operator
HC400ML Gate Operator
HC500ML Gate Operator
HC600ML Gate Operator


Merlin Garage Door Keypad Features

The C840 Garage Door Keypad allows you to access your home via a simple pin code. It’s perfect for if you want to go for a jog without carrying keys, or the kids coming home from school without worrying about them losing their keys. The C840 is perfect for holiday rentals, as you can set a temporary PIN code that will expire after a set period of time or after a number of uses. This also makes it perfect if you go on holidays and you want your neighbours to feed the pets.


As a Security+ keypad, the C840 Garage Door Keypad is compatible with the older Merlin and Chamberlain Security+ garage door openers using C945’s, as well as the older garage door openers using orange and purple learn buttons. Programming the keypad yourself is very simple, taking less than 1 minute.


SKU C840
Brand Chamberlain
Shipping Weight 0.1810kg
Shipping Width 0.120m
Shipping Height 0.050m
Shipping Length 0.215m
Shipping Cubic 0.001290000m3

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