The key reader module translates the information it receives from the exciter coil into a J1939 message and sends it to the Electronic Control Module (ECM) that has the MSS installed on it. This is typically the Machine ECM. The ECM is set up with the ID of the keys of the intended users. When the MSS is armed, the ECM validates the ID of the key in the key start switch. If the key ID is in the list of authorized keys in the ECM and the key is valid, the machine will operate normally. If the key ID is not in the list of authorized keys or is not valid in the ECM, the MSS will keep the critical machine functions disabled.
Components
The Machine Security System consists of the following components:
- Electronic Control Module (ECM)
- Caterpillar Electronic Key
- Caterpillar Optional key pad entry
- Exciter Coil
- RFID Key Reader Module (MSS3i)
- Status Indicator
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MSS3i Connections (1) SAE J1939 (2) CAT Data Link (3) External Keypad (Required for Passcode Entry) ( 4) Integrated Keypad (Required for Passcode Entry) ( 5) RFID Key Reader Module (MSS3i) ( 6) Exciter Coil (7) Electronic Key (8) Key Switch (9) Battery 12V or 24V (10) Critical System (Transmission ECM) ( 11) MSS3i (Main) Software (12) Relay (13) Starter (14) MSS LED (15) Integrated Cluster (16) Critical System (Engine ECM) ( 17) Critical System (Hydraulic ECM) ( 18) Immobilizer (Support) Software (19) Communications Adapter (20) PC Caterpillar Service Tool Electronic Technician | |
The integrated Machine Security System incorporates the MSS software into an ECM. That ECM controls other machine functions and uses an electronic key reader (MSS3i) to read the key.
The electronic key for the MSS contains an electronic chip that is embedded in the head of the key. Each key contains a unique identification number. The electronic key uses the same key cut as the standard Caterpillar key. The electronic key can be used to operate any machine that uses the current Caterpillar key start switch. The electronic key comes in a gray color or a yellow color. The electronic keys are not configurable.
The exciter coil of the MSS is a ring shaped device. The exciter coil is mounted around the existing Caterpillar key start switch. The exciter coil is used to read the ID that is contained in the Caterpillar electronic key.
Note: Ensure that you have only one electronic key near the exciter coil when the MSS reads the key. If there is more than one key, the ECM will not be able to read the key and the machine will not start.
The status indicator for the MSS is mounted in the dash of the machine near the key switch or the gauge cluster. The status indicator will give basic information about the MSS to the operator of the machine. The status indicator has two colors: red and green.