Pinouts >  Various Electronic Devices
The International Docking System Standard (IDSS) is an international standard for spacecraft docking adapters.

POWER AND DATA TRANSFER UMBILICAL

The standard Power/Data Transfer Umbilical (PDTU) transfers power and data in the same connector shell. The PDTU function is nominally accomplished using two connector systems for redundancy, and arranged to allow for androgynous operation.

 

Pin
Number
Size Pin
Name
Description
13 20

SysB_100BaseT_RX_P_BI_DB_P

100 Base TX (IEEE 802.3u Ethernet) Receive/Transmit positive wire (also used as BI_DB_P/BI_DA_P for gigabit Ethernet)

14 20

SysB_1GEth_BI_DC_P

Gigabit Ethernet (IEEE 802.3ab) BI_DC_P/BI_DD_P wire

15 20

SySB_1GEth_BI_DC_N

Gigabit Ethernet (IEEE 802.3ab) BI_DC_N/BI_DD_N wire

16 12

28VDC_SysB

28 Volts Direct Current from System A or B; sinks or sources voltage between vehicles

19 20

SysB_1553_BUS3_P

MIL-STD-1553 Bus 3 positive

21 20

SysB_Umb_Plug_LoopBack_P

Umbilical loopback positive is shorted with pin 34 on system A; this allows the B system to detect mating

25 20

SysB_1553_BUS1_P

MIL-STD-1553 Bus 1 positive

27 20

SysB_100BaseT_RX_N_BI_DB_N

100 Base TX (IEEE 802.3u Ethernet) Receive/Transmit negative wire (also used as BI_DB_N/BI_DA_N for gigabit Ethernet)

28 12

28VDC_SysB

28 Volts Direct Current from System A or B; sinks or sources voltage between vehicles

29 12

28VDC_RTN_SysB

28 Volts Direct Current from System A or B; return line for 28 volt line

32 20

SysB_1553_BUS3_N

MIL-STD-1553 Bus 3 negative

34 20

SysB_Umb_Plug_LoopBack_N

Umbilical loopback negative is shorted with pin 21 on system A; this allows the B system to detect mating

38 20

SysB_1553_BUS1_N

MIL-STD-1553 Bus 1 negative

39 12

28VDC_RTN_SysB

28 Volts Direct Current from System A or B; return line for 28 volt line

40 12

28VDC_SysB

28 Volts Direct Current from System A or B; sinks or sources  voltage between vehicles

41 12

28VDC_RTN_SysB

28 Volts Direct Current from System A or B; return line for 28 volt line

42 8

120VDC_SysB

120 Volts Direct Current from System A or B; sinks or source voltage between vehicles

43 8

120VDC_RTN_SysB

120 Volts Direct Current Return from System A or B; return for 120 volt

44 8

User_Def_VDC_SysB

Direct Current (user-defined voltage) from System A or B; sinks or sources voltage between vehicles; also serves as mating guide for connector

45 8

User_Def_VDC_RTN_SysB

Direct Current (user-defined voltage) from System A or B; return line for pin 44; also serves as mating guide for connector

46 8

Ground Safety Wire_SysB

Ground Safety Wire provides bonding ground connection between vehicles

48 12

28VDC_SysB

28 Volts Direct Current from System A or B; sinks or sources voltage between vehicles

51 20

SysB_1553_BUS4_N

MIL-STD-1553_Bus 4 negative

53 20

Short_to_pin_66

Umbilical loopback positive is shorted with pin 66 on system B; this allows the A system to detect mating

57 20

SysB_1553_BUS2_N

MIL-STD-1553_Bus 2 negative

60 12

28VDC_SysB

28 Volts Direct Current from System A or B; sinks or sources voltage between vehicles

61 12

28VDC_RTN_SysB

28 Volts Direct Current from System A or B; return line for 28 volt line

64 20

SysB_1553_BUS4_P

MIL-STD-1553 Bus 4 positive

66 20

Short_to_pin_53

Umbilical loopback positive is shorted with pin 53 on system B; this allows the A system to detect mating

70 20

SysB_1553_BUS2_P

MIL-STD-1553 Bus 2 positive

72 20

SysB_100BaseT_TX_N_BI_DA_N

100 Base TX (IEEE 802.3u Ethernet) Transmit/Receive positive wire (also used as BI_DA_N/BI_DB_N for gigabit Ethernet)

73 12

28VDC_RTN_SysB

28 Volts Direct Current from System A or B; return line for 28 volt line

86 20

SysB_100BaseT_TX_P_BI_DA_P

100 Base TX (IEEE 802.3u Ethernet) Transmit/Receive positive wire (also used as BI_DA_P/BI_DB_P for gigabit Ethernet)

87 20

SysB_1GEth_BI_DD_P

Gigabit Ethernet (IEEE 802.3ab) BI_DD_P/BI_DC_P wire

88 20

SysB_1GEth_BI_DD_N

Gigabit Ethernet (IEEE 802.3ab) BI_DC_N/BI_DC_N wire

 

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International Docking System Standard (IDSS) Power and Data Transfer Umbilical (PDTU) visual pinout:click to enlarge
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