Model Railway Control Unit
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Welcome to the Z21
Many thanks for choosing the Z21 signal DECODER from ROCO and FLEISCHMANN! The following pages will provide you with the in-
formation you need to know to connect the Z21 signal DECODER to your system and put it into operation. This manual will also provide
you with a number of practical tips. Please read through these instructions and warning notes carefully before putting the equipment
into operation. Although the Z21 signal DECODER is of a very robust construction, an incorrect connection or incorrect operation can
result in permanent damage to the equipment.
Technical data
Input voltage 12 – 20 V DC (power unit) or with DCC rail voltage
Output voltage is equivalent to the rectied input voltage
Self-consumption 0.16 W
Output power Per output 400 mA
Output power Complete module 2 A
Overload protection Power measurement
Digital system DCC
• Signal addresses from 1 to 2040
• DCC Basic & Extended Accessory Decoder Packet Format
• DCC POM Accessory Decoder CV Access Instruction
RailCom
®
POM read result in RailCom
®
channel 2, can be deactivated
Dimensions W x H x D 104 mm x 104 mm x 25 mm
Included
• Z21 signal DECODER
• 4 pole plug terminal for track connection and power supply
• Four 5 pole plug terminals for the signal outputs
Important information
• If you combine the 10837 Z21 signal DECODER with products from other manufacturers, no warranty is provided in the event of
damage or malfunction.
• The 10837 Z21 signal DECODER may under no circumstances be supplied with alternating voltage.
• Do not use the 10837 Z21 signal DECODER if the mains plug, mains cable or the device itself is faulty or damaged.
• Only perform connection work when the operating voltage has been switched off.
• Opening the 10837 Z21 signal DECODER housing renders any warranty claims null and void.
• Work with care and, during connection work, ensure that no short circuits are produced! An incorrect connection can destroy the
digital components. Please contact your specialist dealer for advice if necessary.
• The 10837 Z21 signal DECODER may heat up during operation. Observe an adequate distance from adjacent parts to ensure suf-
cient ventilation and cooling of the device.
• Never leave your model railway system in operation unsupervised! There is a risk of re due to heating if a short-circuit occurs
unnoticed!
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