Maintainability/Logistics Support; Unit Connector And Interface Signals - L3 Communications Targa 4 Series Technical Reference And Installation Manual

S4 SATA & USB DTU Installation Guide
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
Unscheduled Service
Test Equipment
DTU Keying
DTD Keying
2.6

Unit Connector and Interface Signals

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