L3 Communications Targa 4 Series, Technical Reference And Installation Manual

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TARGA SYSTEMS
S4 SATA & USB DTU Installation Guide 32003444 Rev A
4
2.5 Maintainability/Logistics Support
Targa recommends the DTU, DTD and GSU be declared as LRU’s with return to Targa
Systems for repair.
Maintenance activities DTU: Inspect Door Latch operations - yearly
DTD: Inspect connector - weekly
Unscheduled Service Time to replace DTU estimated @ < 15 minutes
Test Equipment a. Industry standard PC with SATA or USB interface card
b. appropriate DTU test cable & power source
c. Targa DOS based test utility
DTU Keying DTU rear connectors are keyed to ensure proper installation.
DTD Keying DTD is keyed to ensure proper orientation when inserted into
the DTU or GSU.
2.6 Unit Connector and Interface Signals
2.6.1 USB Interface - Data Transfer Unit
J1
Power & Aux Signals (28V power)
J2
USB Connector
Unit Connector D38999/20MC35PN Unit Connector D38999/20FB35PN
Cable Connector
D38999/26FC35SN Cable Connector D38999/26WB35SN
Pin # Signal Pin # Signal
5 Secure Erase -
1
1 Case Gnd
8 Busy +
1
3 D-
12 28Vdc 4 D+
13
28V Return 5 Signal Gnd
2,3,4,9,16,17 Reserved 6 Vbus (+5Vdc out)
1,11,14,20,21 Case Gnd 2,7,8,9,10,11,12,13 Reserved *
6,7,10,15,18,19,22 Signal Gnd
- - * Reserved pins must be left open
J1
Power & Aux Signals (5Vdc power)
Unit Connector D38999/20FC35PB
Cable Connector
D38999/26FC35SB
Pin # Signal
5 Secure Erase -
1
8 Busy +
1
12 5 Vdc
13 Signal Gnd
2,3,4,9,16,17 Reserved
1,11,14,20,21 Case Gnd
6,7,10,15,18,19,22 Signal Gnd
Note 1: Refer to section 2.6.5 below for details on these signals