AB- V-MA-00650
01 February 2021
JF/RR
9
LD900 and INS
Commissioning Guide
Two isolated DC power sources can be used to power the IMU. Alternatively, the two VIN- and two VIN+ pins
can be connected in parallel and connected to a single DC power supply. Ensure that the positive is connected
to VIN+ and that negative is connected to VIN-. The supply voltage must be within the range of 10 to 38 VDC.
Chassis can be connected to a common earthing point in an equipment rack.
When checking the health of the IMU DC power, the Power ( ) LED on the IMU can be used as reference:
RS422 Interfacing
A 2-metre long interface cable is supplied with the IMU, this consists of an M12 Male connector (IMU) to a DB9
Male connector (LD900):
Supplied INS RS422 Data Cable (dimensions in mm)
P1 Pinout (M12)
Function
J2 Pinout (DB9)
1
TX+
2
2
RX+
3
3
TX-
8
4
RX-
7
5
GND
5
Chasis
Shield
Shield
LED
State
Meaning
Off
No power to IMU
On
An error occurred during boot or initialisation
Slow Flash
Booting up / IMU initialisation
On
No error occurred during boot or initialisation
IMU Power LED
RS422 cable pinouts
