9
WIRING A DECODER TO A VALVE SOLENOID
Once all decoders are programmed and labeled, they can be wired to
corresponding valves in the field. The two yellow wires are connected the
valve solenoid wires (see Figure 9-1). The red wire lead should be connected to
the 2Wire path or L1. The black wire lead should be connected to a black wire
representing the 2Wire path or L2. Your 2Wire communication wire color may
vary.
DECODER WIRED TO A VALVE SOLENOID
Figure 9-1
PROGRAMMING AN EXTERNAL SENDER
For applications above 32 stations, Underhill 8-station External Sender’s p/n TW-SEN-8 can
be used up to manage up to 63 stations. These are programmed using the same portable
programmer. The Sender addresses must be programmed from 5-8. For example, stations
33-40 is activated with the Sender address 5, while stations 41-48 addressed as 6.
The following are steps to program a Sender. See Figure 9-2 shows a Sender connected to a
Portable Programmer.
1. Plug the red and black wires of the Sender into the programmer’s red and black push
terminals.
2. To set the Sender’s address on the programmer’s LEDS (value 5-8) by using the “Raise
or Lower” buttons, then press the red “Prog.” button.
3. The programmer will display CH0, CH1, CH2, CH3, then SN1, SN2... until it finds
the Sender’s existing number, then will program the new number into it.
If successful, the Green pass LED will come on and the Sender’s new number will
display on the LED’s. Immediately after programming, the LED in the bottom
of the Sender will flash the same number of times as the address programmed.
4. Write the Sender base address with an indelible pen in the little white box
on its label.
PROGRAMMING A UNIVERSAL SENDER
Figure 9-2
