Overview of Hardware
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| Illustration 1 | g01758256 |
View of an Electronic Control Module (ECM) | |
The Health Interface Module (HIM) consists of an ECM that is flashed with Caterpillar proprietary firmware. Refer to Illustration 1. The ECM has a standard 70-pin connector. A breakout harness provides the appropriate connectors that are required for the integration with other devices.
The main connections from the ECM are provided in the following list:
- Connection to a broadband radio that can communicate over the Wireless Local Area Network (WLAN) of the mine
- Connection to the telemetry port of a Vital Information Management System module (VIMS module)
- Connection to the service port of a VIMS module
- Connection to a power source
- Connection to a Low Precision Global Positioning System module (LP GPS module)
- Connection to a third party device that requires telemetry signals from VIMS
Note: The connection to the LP GPS module applies to the HIM LP GPS Option only.
Note: The connection to a third party device that requires telemetry signals from VIMS applies only to HIM.
Connector Pinout
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| Illustration 2 | g01667081 |
Rear view of pinouts for ECM | |
Refer to Illustration 2 for the arrangement of the pinouts for the connector that is located on the ECM.
Integration of Hardware
| Wiring Connections | ||||
|---|---|---|---|---|
| Interface | Pins | Usage | Connection | |
| Serial 1 (RS232) | RX: 22 TX: 13 GND: 31 |
Connects to the VIMS telemetry port in order to obtain health information | Pin 22 Pin 13 Pin 31 |
VIMS pin 32 VIMS pin 33 HIM pin 43 |
| Serial 2 (RS232) | RX: 35 TX: 27 GND: 43 |
Telemetry Pass Through Option (TPO) for HIM and the connection for the LP GPS module for the HIM LP GPS Option | Pin 35 Pin 27 Pin 43 |
For HIM LP GPS Option: GPS Main TX GPS Aux RX GPS common ground |
| Serial 3 (RS232) | RX: 63 TX: 62 GND: 64 |
Connects to the VIMS service port to download underscore files | Pin 63 Pin 62 Pin 64 |
VIMS Pin 40 VIMS Pin 41 VIMS Pin 66 |
| Ethernet (10Base-T) | TXD+: 2 TXD-: 1 RXD+: 15 RXD-: 14 |
Provides access to web interface | Connects to a WLAN module. Will not sense polarity automatically |
|
| Keyswitch | +BATT: 70 | Enables booting of device | Pin 70 | +DC power |
| Power | +BATT: 52 +BATT: 53 -BATT(GND): 65 -BATT(GND): 67 |
Powers device | Pins 52, 53 Pins 65, 67 |
+DC power -DC power Connects to a DC power supply that provides 20-30 VDC. Approximately 5 amps are required on bootup and 1 amp is required afterward |
| Digital Output 1 (300mA sinking) | SIG: 58 | Used for diagnostics | ||
| Digital Output 2 (300mA sinking) | SIG: 59 | Used for diagnostics | ||
| Digital Output 3 (300mA sinking) | SIG: 60 | Used for diagnostics | ||
| Digital Output 4 (300mA sinking) | SIG: 61 | On = HIM device controls service port Off = Laptop computer controls service port |
Connects to the relay on the harness. By default, the relay is energized when the HIM is powered. When the HIM detects communication from the service laptop computer, the HIM will release the relay for the duration of the communication plus one minute. This will allow the service laptop computer to communicate with the VIMS service port. | |
Refer to Table 1 for the wiring connections of the HIM and the HIM LP GPS Option.
Note: There is only one wiring difference between the HIM and the HIM LP GPS Option. For the HIM, the Serial 2 port is connected to the third party device. For the HIM LP GPS Option, the serial 2 port is connected to the LP GPS module.