7
•
Turn Off system power, disconnect ROV tether from the OTPS1KW-ASM-TOPSIDE-R2. Turn On
system power and observe the HV bias reading. If reading anything over ±2%, there is an issue
with the power supply. Return for repair.
•
If the HV Bias is <±2% with tether disconnected, turn Off system power and reconnect tether to
the OTPS1KW-ASM-TOPSIDE-R2. Disconnect the tether from the vehicle, and attach 3pin male
and 8 pin male dummy plugs to the ROV end of the tether. Submerge as much of the tether as
possible, turn On power and observe the HV Bias reading. If >±2% return tether for repair. If a
spare tether is available, repeat test with second tether.
•
If HV Bias is <±2% with dummy plugged tether, power down unit and reconnect to vehicle. Turn
on power and observe the HV bias reading. If HV Bias >±2% return OTPS1KW-ASM-ROV-R1 for
repair.
2.
HV Bias Trips GFI
Repeat steps from bias condition above and return faulty components for repair.
3.
Depth Sensor Dropouts and Erratic Reading/HUD Errors
•
The high voltage step-down power supply can add additional noise into the system due to high
voltage switching. In addition, the nature of I2C communications make it susceptible to this
noise. The solution is to implement common mode noise suppression by adding a ferrite to the
I2C connection from the depth sensor to the Pixhawk. The standard-length depth senor cable
only allows for single pass. Therefore, it is recommended to add two ferrites cores.
•
Installation:
•
Disconnect the I2C Depth Sensor wire from the Pixhawk
•
Feed the I2C wire through two ferrite cores
•
Position one ferrite near the Pixhawk and position the other near the depth sensor
•
Secure in place using cable tie, heat shrink, etc.
•
Reconnect the I2C depth sensor wire to the Pixhawk I2C port
•
Recommended part: Laird-Signal Integrity Products LFB143064-000
Electrical Interface
OTPS1KW-ASM-ROV-R1 Enclosure Connections
Input Power Connection
Connector: Subconn/Seacon MC-BH-3-M
Pin
Signal
Function
Description
1
HV +
Power
+200 VDC
2
HV -
Power
- 200 VDC
3
Chassis
Power
Chassis Ground
Input Data Connection
Connector: Subconn/Seacon MC-BH-8-M
Pin
Signal
Wire Color
Description
1
2
Spare
Spare
Orange
Orange/White
Spare twisted
pair
MC-BH-3-M
Face View
Summary of Contents for OTPS1KW-ASM-ROV-R1
Page 10: ...10 Tether Wiring...
