roco Z21 Signal Decoder User Manual

Model Railway Control Unit
WWW.Z21.EU
60
Bootloader mode (e.g. during rmware update)
Colour Status Meaning
Blue
Red
Green
White
on
on
on
on
Wait for data/commands from zLink.
Bootloader mode active.
Blue
Red
Green
White
on
on
ashes briey
on
Data/commands are processed by the zLink.
Bootloader mode active.
8. Troubleshooting
Error ashes red:
The outputs of the Z21 signal DECODER are electronically protected against overload and short circuits. The total switching capacity
per output totals 400 mA, and the maximum total current of all outputs 2A. In case of overload, all outputs are switched off and the
red “Error” LED ashes for several seconds. During this time, the decoder does not accept any new switching commands. The decoder
then resumes normal operation.
Signal addresses are shifted by four:
Check that the set addressing mode matches your control centre. See section Operation on control centres from other manufacturers.
POM read (RailCom
®
) is not functioning:
Check the correct connection on the Z21 (P and N). See section Connecting the Z21 signal DECODER.
See also section Operation on control centres from other manufacturers.
It may be that the control centres used are not compatible with RailCom
®
.
Connected LED is not lit:
Ensure that the polarity is correct. See section Connecting the Z21 signal DECODER.

roco Z21 Signal Decoder Specifications

General

Brand	roco
Model	Z21 Signal Decoder
Category	Media Converter
Language	English