User`s guide

6. Press the Dial to choose NEW ADDRESS: NONE. Turn the Dial to display the preferred
address, then press the Dial to enter. In this example, station number 12 will be assigned to
decoder station slot 2 of 4.
7. Turn the Dial to choose PROGRAM, then press the Dial to begin the procedure. Within
a few moments the results will be displayed. If programming was successful, OK will be
momentarily displayed in the upper right corner, and the next decoder station number
in sequence will be displayed. If programming was not successful, FAIL will be displayed
and an alarm will be generated.
Note: To clear the Alarm, press the HOME key, turn the Dial to choose ALARMS, then press the
Dial to view Alarm information. Turn the Dial to choose CLEAR, then press the Dial select. Check
decoder wire connections and repeat the procedure.
8. Repeat the programming procedure for all decoder stations as required.
Connecting the Decoders
Installing a decoder system requires a dierent approach to eld installation compared to a conventional multi-wire
irrigation control system. The main dierences include:
• A two-wire cable provides power and communication
signals from the controller to up to 100 decoders for
individual control of up to 202 eld outputs.
• The two-wire cable system can be congured in one of
three methods: straight line, grid or loop, as illustrated
in the accompanying diagrams:
A
TW-LA-1 lightning arrestors must be connected
throughout the two-wire path at intervals of 600’ (183m)
or less. The same grounding requirements as specied for
the controller are required for each lightning arrestor.
B
The cable wire path from the furthest decoder to the
controller cannot exceed 5000’ (1.54km).
C
The cable wire length from the decoder to the valve
(or pump) must not exceed 100’ (30m).
• TW-CAB-14 – 14-gauge, two-wire direct-burial
communication cable (or equivalent) is required
for decoder connection.
• Two-wire cable wire color polarity must be main-
tained throughout the system and connected to
the corresponding controller terminals.
• All wire splices and eld connections must be
insulated using TW-SPLICE-14 waterproof wire
connectors (or equivalent).
Note: Refer to Two-Wire Decoder System Specica-
tions page 8 for additional important information
regarding decoder system installation requirements.
Testing the Decoder System
The purpose of the test is to verify the functionality of
each decoder station and its associated valve solenoid.
Alarm log entries can be generated to locate and
resolve decoder system issues and/or archive the test
results for later review. See Testing the 2-Wire Decoder
System on page 7 for complete information.
CURRENT ADDRESS:NONE
NEW ADDRESS[012]
-2- OF 4 -PROGRAM-
PROGRAM DECODER:
CURRENT ADDRESS: 12
NEW ADDRESS-012-
-3- OF 4 [PROGRAM]
PROGRAM DECODER: OK
FAIL
Straight Line System
Lightning
Arrestor
Decoder
A
B
Ground
Electrode
Controller
Valve
C
A
Grid System
Loop System
A
A
C
B
A
C
A
A
B
TW-D-1 Single Valve Decoder
TW-D-2 Dual Valve Decoder
TW-D-4 Quad Valve Decoder
TW-LA-1 Lighting Arrestor
TW-SPLICE-14 Waterproof Wire Splice
TW-CAB-14 14-Gauge, 2-Wire,
Direct-Burial Cable
Part No. Description Part No. Description
Figure 11
TW-CAB-14
TW-D-2
TW-LA-1
Ground
Rod
TW-SPLICE-14
4 “
(101mm)
1/2”
(12.7mm)
4
CURRENT ADDRESS:NONE
NEW ADDRESS-012-
-2- OF 4 [PROGRAM]
PROGRAM DECODER: