Please note that the correct address must be set on the signal decoder. This address consists of a particular group of settings for the decode switches on the k84 decoder and the use of a particular output on the k84 decoder.
There are accordingly 4 consecutive addresses that can always be accessed on a k84 decoder.
During the configuration process for the signal you can read the appropriate switch settings and the output to be used on the k84 decoder after you have selected the corresponding group of switches (8 switches for the k84 decoder) and then transfer the settings to the signal decoder.

If the signal setting does not correspond to the setting shown on the Central Station, then all you have to do is swap the two blue wires on the mechanism in question.

The Outputs on the k84 Decoder


Connections for a Signal to the k84 Decoder,
here at Outputs 3 and 4. 
The wires not connected here are for controlling track voltage. The connections for these wires can be found in the instructions for the signal in question. 

The Connections in Detail.



Note:
The signal is being switched in the wiring diagram shown. The voltage in the track must however be switched with another output on the k84 decoder. Another option is to use a universal relay, which will control the track voltage to match the signal setting.