Zimo MX644D (21-pin direct) Sound Decoder

Code: MX644

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Zimo MX644 Sound Decoder

30x15x4mm 1.2A continuous / 2.5A peak 25V direct stay-alive (16V via LifeLink/SACC16) 21pin direct plug-in 3W audio / 8 Functions With native 25V stay-alive supplied with example capacitor

NOTE: The MX644 has been superseded by the MS440

Variants / Sub-Products

MX644D	× Cancel	'D' Version (All 8 full-power AUX outputs)
MX644C	× Cancel	'C' Version (5th+6th AUX outputs are logic-level)

Description

The MX644 sound decoder from Zimo is the industry leader of 21-pin MTC direct-plugin sound decoders, packed with all the features you have come to expect from Zimo, plus 8 AUX function outputs for lighting, smoke generators, auto-couplings etc., and 'smart stop' energy storage facilities built-in (just add an external capacitor to take advantage).

Supplied with the MX644 is normally a 470uF/25V electrolytic capacitor - worth connecting, but also worth considering an upgrade to 1000uF or more if you have space in your model, or even an amazing SuperCap (6800uF or 17000uF). Note that a SuperCap (or any 16V capacitor must be connected via our LifeLink PCB as the MX644 is designed for 25V capacitors directly).

Technical Specification

• 3W audio power
• 4ohm - 8ohm speakers supported
• 6-channel output.
• 1.2A continuous motor output / 2.5A peak for short periods
• 8 AUX function outputs, max combined 0.8A
• 2 logic level outputs e.g. servo control / SUSI
• Energy storage support with Smart Stop
• 32 MBit memory
• Railcom
• DCC, DC-Analog, MM, AC-Analog

Soldering stay-alive wires to an MX644

Related Products

	YouChoos British Sounds
	Zimo SugarLump
	330uF 25V Electrolytic Capacitor
	1000uF 25V Electrolytic Capacitor
	6800uF 15V Zimo SC68 SuperCap

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Zimo MX644 Sound Decoder

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Zimo MX644 Sound Decoder

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Zimo MX644 Sound Decoder

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Zimo MX644 Sound Decoder

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MX644D as shipped

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Need length of blue wire, grey wire and capacitor

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Tin (solder-coat) the corner pads on the decoder

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Note capacitor long leg is +VE, short leg is -VE (and also has stripe down side)

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Snip capacitor legs short

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Bend legs

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Tin capacitor pins and wire ends

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Solder wires to capacitor and decoder (blue is +VE and is left-most looking from the rear)

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For models that do not have speaker connections, purple wires can be soldered directly to decoder socket pins (WARNING - invalidates Zimo warranty)

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