Topcon Apollo ISOBUS UT - Chapter 12: Apollo ECU Information; Types of Apollo ECUs; Interpreting Apollo ECU LEDs; Power LED Behavior

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Chapter 12 – Apollo ECU Information
There are two types of Apollo ECUs available:
l The CM-40 is the main control module.
l The EM-24 is the Input/Output expansion module.
12.1. Interpreting Apollo ECU LEDs
Power LED
Transmit LED
Receive LED
ECU Status LED
Note: If a fault occurs in the ECU, an error code may be displayed.
Refer to Apollo ECU error codes, page 93.
12.1.1. Power LEDs
The power LEDs display different behavior on the CM-40 and EM-
24 ECUs.
The following types of 12V power are applied to the Apollo ECUs:
l ECU power: Powers the internal logic and sensor power supplies.
l solenoid power: Powers the relays and H-bridges.
l VCB solenoid power: (Vertical Connector Board) power supplied
on the ECU connectors.