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CTX
Line Power Unit II
The Line Power Unit II (LPU II) is the next generation power system for ION DigiRANGE II™ CTX acoustic devices.
The LPU II provides a communications interface between the Positioning Control System (PCS) Line Interface Unit
(LIU) and the CTX while providing 48 VDC power.
The LPU II splits a single LIU FSK channel into seven
channels. Six channels combine 48 VDC with FSK
communications to power the CTX units. One channel
serves as a pass through to link up to 5 LPUs, providing
power and communications for up to 30 CTX units.
SYSTEM ENHANCEMENTS
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FSK communication ports are electrically isolated from each other
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If leakage occurs or the signal is loaded down on one channel, the remaining
channels’ signal level will not be degraded
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Independent amplifiers for each channel and COM OUT port ensure consistent
signal levels
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Shielded 3 pin communication connectors on all FSK signal enhance noise reduction
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3 pin connectors enable easier cable swapping
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Test points measure DC voltage levels and FSK communication signals
Physical Characteristics
Width
17 inches
Depth
21.75 inches
Height
5.25 inches
Electrical Characteristics
Input voltage
104-132 VAC Input with voltage selector switch set at 120 VAC
191-242 VAC Input with voltage selector switch set at 220 VAC
Input Frequency (47 - 63 Hz) Note: De-rate output current 10% for 50 Hz operation
Line power output
Unit is equipped with 6 isolated FSK/Power outputs with each line capable of:
48 VDC ± 2.5 V
500 mA max continuous current
Ripple
3.0mV pk-pk plus 0.02% of output voltage max
Recommended wire
Twisted pair 22 AWG minimum gauge size. Wire length should not exceed 2000 m.
Operating temperature
De-rate output power linearly above 50°C by 3% per C.
Order Information
CTX Line Power Unit II
9000-503/02
© 2011 ION Geophysical Corporation. All rights reserved. Information subject to change.
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