IMAGENEX DT101Xi, Техническое руководство

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3. Motion Reference Unit (MRU)
•
The MRU is connected via a Samtec 20 pin (4+16) (yellow keyed) connector:
Panel = Samtec ACRK-22-05-G-S-C-P-4 4+16 pin (Yellow Keyed)
Cable = Samtec ACPK-22-05-G-T-P-4
Pin Direction (Relative to SIR) Function Note
1 N/C
2 N/C
3 In
4 In MRU RS232
5 Out Reserved
6 Out COM Signal Common
7 Out Heading Assist RS232
8 Out COM Signal Common
9 Out GPS Assist RS232
10 N/C 1PPS 5V Logic
11 N/C COM Signal Common
12 N/C
13 N/C
14 N/C
15 N/C
16 N/C
17 N/A SHLD Shield
18 Out +24V Power
19
20 Out COM Power Common
Table 6-4
•
Power is available on Pin 18, Pin 20 (12 VDC or 24 VDC option depending on jumper setting (see
Figure 6-8)) for powering of MRU if required:
•
The MRU port receives data as a TSS1 format string (
XXAAAASMHHHHQMRRRRSMPPPP<CR><LF>)
on Pin 4, 6 (see Table 6-4).
•
Communication parameters are set as follows in the SIR unit (Table 6-5):
Item Settings
Baud rate 19200
Number of bits 8
Stop bit 1
Parity bit None
Supported strings TSS1 Format
Table 6-5
•
If a PPS is required for the MRU used, it is available Pin 10. (Table 6-4)
•
Note that GPS and Heading assist allows for enabled MRUs to receive NMEA stings to assist with
motion reference. If used, Pin 7 (Heading) and Pin 9 (GPS) should be used to supply NMEA strings to
the Enabled MRU.