3 Electronics
Helix dispensers contain the Wayne iGEM™ computer. The iGEM computer, located on side 1
of the dispenser, controls all functions of dispenser operation, except for Wayne™ CAT operations.
Wayne CAT operations are controlled by the iX™ R2 board located on side 2 of the dispenser.
The iGEM computer contains flash RAM memory and supports IR remote control programming
and diagnostics. The IR remote control (IRC) is used to program computer functions such as
filling mode, prices, blend ratios, and fueling point number. The remote also is used to view the
diagnostic statistics such as, error codes, event counters, flow rates and calibration factors. See
iGEM programming manuals, WM048524 NA version and WM048525 IEC version.
An important troubleshooting component on the computer board is the on-board LED indicators.
In addition to voltage source indicators, the LEDs provide a visual indication of data link, pulser,
and CAN bus communications. See the Board Layout section for location and description of the
LEDs and other components on the iGEM board.
Another service tool is the Service Terminal (servTerm). ServTerm is a software program that
allows technicians to interface the pump computer via a laptop to perform troubleshooting and
other diagnostic procedures. Pump software changes and model template configurations are
performed by uploading software from the laptop to the iGEM pump computer via the RS-232
link. Always use the latest versions of iGEM and servTerm software.
The iGEM computer and the electronic boards shown in Figure 3.1 are required to service Helix
dispensers. Each of these boards are discussed in detail in this section.
Heater/Fan
Sales Display Controller
Unit Price Controller
Connection Board - Suction
Serial/Parallel Converter
TTL/CAN Converter
Connection Board - Remote
*ISB
*Temp Comp ISB
**Nozzle Switch Interface
**Temp Comp Module
included in Temp
Comp and DEF
models only
** Nozz Switch I/F Board is in a case; part ships separately
*ISB Board is mounted in a case; part ships as an assembly
Figure 3.1: Boards Used in Helix Dispensers
26 WM048523 Rev 08 01/2019
3 Electronics
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