MSS3s Machine Security System Caterpillar


Electronic Control Module (ECM)

Usage:

120G 11W

FCC NOTICE

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

  1. This device may not cause harmful interference.

  2. This device must accept any interference received, including interference that may cause undesired operation.

Industry Canada Notice to Users

This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions:

  1. This device may not cause interference.

  2. This device must accept any interference, including interference that may cause undesired operation of the device.


Illustration 1g06105748

ECM Inputs

Keyswitch

The key start switch is also used as an input signal to the MSS. The input from the key switch is used to determine when the machine is on. Battery voltage is connected to this input through the ON and START positions of the keyswitch. When the machine is operating and the alternator is charging, the voltage on this input will be:

  • 14.1 - 15.1V for a 12V system

  • 27.6 - 29.6V for a 24V system

When the machine is not running, the voltage on this input will be approximately 12V for a 12V system and 24V for a 24V system.

Neutral Start Input

When activated, the NEUTRAL START input supplies power to the neutral start ON/OFF driver 5 (STARTER solenoid driver) using +BATT.

Switch to ground

These inputs allow the ECM to detect closure of switches to the ECM ground (- BATTERY input).

ECM Outputs

Status Indicator

The status indicator displays status of the system. The status indicator has three connections. One of the three connections is for a ground. Another connection is for the red LED. The third connection is for the green LED.

Output Drivers

Two output drivers are available to control relays or solenoids on the machine. Unless a valid "key ID" has been identified by the system, the drivers will remain without power. The drivers are rated at 2A.

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