SKF 15V-090-00082-100, Руководство пользователя

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INSTALLATION AND OPERATING INSTRUCTIONS
GPS module connection notes
SKF Multilog On-line System IMx-Rail
User Manual Supplement
Revision B 15 (29)
2.6 GPS module connection notes
2.6.1 GPS (location data) module
An external GPS module is available as an option. When fitted, GPS data is
requested by the IMx via Modbus RTU over an RS485, 2-wire connection. On this
interface the IMx is the master device and the GPS module is the slave device.
The GPS module comes with a 5-m cable allowing it (with its integral antenna) to be
fitted outside of the IMx-Rail enclosure in an appropriate location that will allow it to
acquire satellite tracking.
The GPS module is connected to the user terminals provided, refer
Table 2 below
and section 3.4.1 . Note that the RS485A (A/B) terminals must be used.
Table 2 GPS module connections to IMx-16Plus
Wire colour Description IMx-Rail terminal
Brown GPS module power GPS PWR
Black RS485 A RS485A A
White RS485 B RS485A B
Blue Module 0V GND
Grey Not used -
Refer note, below, about bus termination.
The GPS module has two status indicators, visible on the front face of the module:
Green flashing: Power on
Amber flashing: Modbus communications activity
2.6.2 RS485 Modbus bus termination
If an IMx-Rail device is placed first or last in the bus chain, then an external bus
termination resistor must usually be connected to it. (Note: there is no built-in
termination that can be activated by configuration).
Important
–
When connecting the optional GPS module to the IMx-16Plus,
do not fit a termination resistor.