WD-34 / WD-34.2 variants

4-way switch decoders (magnetic article decoders)

• for the control of 4 switches or 8 other magnetic articles
• with adjustable on-time

Applications

• Switches with double coil drive
• Form signals with double coil drive
• Decoupler

Versions

• WD-34: Kit (for self-soldering)
• WD-34.2: Prefabricated building block (built-up and tested circuit)
• WD-34.2: Ready-to-use device (ready-to-use device in the housing)

Digital protocols

• DCC + MM: yes (automatic form detection). The four outputs can be mixed both via DCC and Motorola commands as well as alternating in DCC and Motorola format.
• mfx: no
• Selectrix: no

Address ranges

	WD-34     (Kit)	WD-34.2 (Pref. building block)	WD-34.2  (Ready to use)
DCC switch addresses	1 - 2.040	1 - 2.040	1 - 2.040
DCC locomotive addresses	---	1 - 510	1 - 510
MM switch addresses	1 - 1.020	1 - 1.020	1 - 1.020

Feedback protocols

• RailCom: yes
• RailCom plus: no
• mfx: no

Data bus

• none

Programming

DCC Central: Setting of all decoder properties via configuration variables (CVs)

• Motorola Central: Setting the decoder address with a programming jumper (WD-34) or programming button (WD-34.2). The change of the other decoder properties is not necessary for the pure Motorola operation and is not possible with Motorola control panels.

Control with DCC or MM switch commands

• DCC or MM softkey commands
• automatic form recognition
• Outputs can be mixed via DCC and Motorola commands
• Outputs can be controlled in alternating DCC and Motorola format

new in version WD-34.2: alternative control with DCC locomotive commands

• as an alternative to the drive with soft positioning commands (for example, when using DCC digital controllers which do not send switch commands)
• Switching the 4 outputs of the WD-34.2 via the functions F1 to F4
• not possible with the WD-34 (version kit)

Switching outputs

• Amount: 4 x 2
• Max. Current per output: 1,500 mA (up to 2 s) or 1,000 mA (duration)
• Max. Total current: 1,500 mA
• integrated relay: no

new in version WD-34.2: Confirmation of a false switch position

• After the set switching time ("On-time") has elapsed, the WD-34.2 compares whether the actual position of a switch with the limit switch corresponds to the position that it would have according to the digital command.
• If this is not the case, the fault can be indicated on an external LED (LED not included in the scope of delivery). Possible error causes:
• mechanical problems
• Soft adjustment by hand
• Indication of the wrong switch over the flashing sequence of the LED.

Overload protection

• none

Supply voltage

• Digital voltage from the booster circuit
• or its own transformer (to relieve the digital circuit)