Appendix A

Epsilon User’s Manual

Appendix A
PAF-937M Interface

This appendix describes PAF-937M Interface.
The separation system, PAF-937M, features a Marman clamp band with a diameter of 937 mm and a
low shock separation mechanism (LSSM) with a non-pyrotechnic device.

bandΦ937

Marman Clamp Band of PAF-937M

LSSM

BandCatcher

A-1

Appendix A

Epsilon User’s Manual

A1. Details of Mounting Position
Distances from STA* to the separation plane are as follows:
・For single launch

STA 6698.5 mm

・For multi launch

STA 5238.5 mm*STA (station): The origin is at the top of the fairing, from which distances are measured in alongitudinal direction of LV, or along XB axis. The figure increases toward lower stages.
The coordinate system in this document is the same as shown in Chapter 2.2. The origin is at thecenter of the separation plane.
A2. PL Usable Volume
PL usable volume is defined in Chapter 4.1.1.
The usable volume for PL in single launch is shown in Figure 4-1.
The usable volume for Small satellite in multi launch is shown in Figure A2-1.
φ2363935

φ1850

Small satellite

1001398(multi launch)

Separation plane STA

1005238.5
φ600
φ959

[mm]

Figure A2-1 PL Usable Volume (multi launch)A-2

Appendix A

Epsilon User’s Manual

A3. Mechanical Interface(1) Configuration of PAF (LV side)
The separation mechanism of PAF-937M is shown in Table A3-1.
The cross section of the separation flange is shown in Figure A3-1.
The locations of separation springs, separation switches and separation connectors are shown inFigure A3-2.
Table A3-1 Separation Mechanism of PAF-937M
Separation Method

Separation Spring

ClampMarman Clamp band

OthersSeparation Switch (micro switch)
Separation Connector
Band Catcher

0° line-marking

Figure A3-1 Cross Section of Separation Flange around Separation PlaneA-3

Appendix A

Epsilon User’s Manual0°

Separation
Switchon LVonside
Separation
Sensor
LV

SeparationConnector
Connector
Separation

(395)

UMB2

Band Catcher（10 positions)

B

B
(480)

Low Shock Separation
Mechanism (LSSM)YBB 90°＋X

Contacted Position

270°
Marman Clamp Band
Separation Phase(90-270°)(480)

Separation
Switchon onPLSCside
Separation
SensorMaster KeyAttached Position

Separation
Separation SwitchSensor on PLSC side

Contacted Position
Master Key

UMB1ASeparation
SpringPosition
Spring Actuators(12 positions Max)
(395)

A

Separation Connector
Connector
Separation
Attached Position

180°

Separation
SeparationSensor
SwitchononLV
LV side

ZBB＋Y

[mm]

［TOP VIEW］
Figure A3-2 Locations of Separation Springs ,Separation Switches and Separation Connectors on
Separation Flange (LV side)A-4

Appendix A

Epsilon User’s Manual(2) PL’s Rear Frame
The load applied to PL’s rear flame by a separation spring during PL/LV mating dose not exceed 1,400N.
PL’s rear frame shall satisfy the following requirements.
Material: Aluminum alloyArea: A ≧ 347.3 [mm2]Moment of inertia of area: Izz ≧ 16130.1 [mm4], Iyy ≧ 12365.2 [mm4]Length: L = 25 [mm]PL’s rear frame and PAF’s separation flange are joined by a Marman clamp band. Its typical
specifications are as follows:Tension: 18 [kN] or less(temporarily rises up to 35 kN during clamping work.)Phase of Separation Mechanism Location: 90° (in LV coordinate system)

The details of PL’s rear frame are described in ICD.
The typical examples are shown as follows:
・Cross section of PL’s rear frame around the separation plane : Figure A3-3・Contact surface with an LV separation spring: Figure A3-4

R0 .
7 ±0.25

R5. 1±0. 5
R2.28±0. 25

XB

0°位相の0° line
フランジ端面にmarking
けびき線を施工のこと*XB: the longitudinal axis of LV body (See Chapter 2.2)

Figure A3-3 Typical Cross Section of PL’s Rear Frame around Separation Plane

A-5

Appendix AEpsilon User’s Manual

Separation
plane
衛星分離面

0φ7

分離スプリング接触面中心

Center of the contact surface
with a LV Separation spring

Φ825.5Figure A3-4 Typical Contact Surface with LV Separation Spring

A-6

Appendix A

Epsilon User’s Manual(3) Material for Mating Section
The standard material for the mating section is shown in Table A3-2.
Table 4-2 Material for Mating Section
PL sideLV sideAluminum alloy

Aluminum alloy(4) Coating on Mating Section
The standard coating on the mating section is shown in Table 4-3.

Table 4-3 Coating on Mating Section
PL sideLV sideChemical Conversion Coating

Chemical Conversion Coating

MIL-C-5541 class 3

MIL-C-5541 class 3(5) Separation Connector
The side view of a separation connector after mating are shown in Figure A3-5.
The layout of PL’s separation connectors on the YB-ZB plane are shown in Figure A3-6.
Insert normal and clocking (keying) positions of PL’s separation connectors are also shown in Figure
A3-6. If any change is needed, contact your Program Director.
The specifications of separation connectors are described in the next chapter A4.

A-7

Appendix A

Epsilon User’s ManualPL
SCsideside

DBAS70-61

UNMATED

MATED

LV sideDBAS79 61

MATED（64.15±0.2mm
from separation plane）

Distance
after
Checkdimension
aftermating
matingononPLcustomer’s(dependspanel thickness)(Setdependsdesign）

Reference Plane
after
CheckDistancedimension
aftermating
mating12.65±0.9mm（64.15±0.2mm
from separation plane）

Reference Plane

In the case ofPanel Front Mount

In the case ofPanel Rear Mount

Figure A3-5 Side View of Mated Separation Connector

UMBJ2*Thoughthe dimension
tolerance
the*The dimension
toleranceof theof
centershouldofbeseparationtaken intoconnectors
consideration
for tocenteris needs
PL design;
due tothese
difficulty indesign
SC forhowever,the customer,
precise measurement,
dimensions
are referencethesevaluefigures
becauseareitjustfor reference.
TheCompatibility
compatibilitywill
is beisdifficult
to measure.
confirmedat
bythe
FitFitCheck.
confirmed
check.
**The2
separation
connectors
UMBJ1**use 2 separation connecters
havingand UMBJ2 are different in insert
different type of insert for prevention
keying/clocking position to prevent
connecting UMBJ1 and UNBJ2 alternately.
incorrect connection.

0°(395±0.5mm) *Master Key（480±0.5mm）*

UMBJ2YBB＋X

270°（480±0.5mm）*90°(395±0.5mm) *180°

DBAS70 61-0SY-090
Insert Clocking Position:

Insert Clocking Position
Y (75°):The insert
is in(Insertverticalaxis isrotated75°
clockwise.
the clocking position Y**）ZBB＋Y[BOTTOM VIEW]

Masterkeyway
Master
Key

UMBJ1

UMBJ1
DBAS70 61-0SN-090
Insert Clocking
Normal Position:
InsertPosition
N (0°) axis is in(Insert verticalthe normal position**）Figure A3-6 Layout and Insert Normal/Clocking Positions of PL’s Separation Connectors

A-8

Appendix A

Epsilon User’s Manual(6) Separation Switch (Micro Switch)
Separation switches, which detect PL/LV separation status, are installed on LV side (PAF). Moreswitches can be mounted on PL side (PL rear frame) if needed. The standard number of the switches is 2for each side.
The standard specifications of the separation switch are shown in Table A3-4.
The position of PL separation switch (if needed) and its contact surface on LV side are shown in Figure
A3-7.
The position of LV separation switch and its contact surface on PL side are shown in Figure A3-8.

Table A3-4 Standard Specifications of Separation SwitchParts No.

Force (minimum)

Force (maximum)

after separation

17.8 [N] (stroke 0 [mm])53.3 [N] (stroke 0 [mm])before separation

35.1 [N] (stroke 2 [mm]) 103.6 [N] (stroke 4 [mm])M8805/80-01※The ”stroke” is the distance between the top of switch in pressed position and that in unpressed
position. The distance is 0 [mm] when the switch is unpressed.

A-9

Appendix A

Epsilon User’s Manual

Separation
PLSwitch for SC

3±0.5

PL sideφ864

ロケット側受け面
Contact Surface on LV
PL自由長
FreeLengthストローク
stroke3±1

衛星分離面
Separation
plane

φ864
衛星側
Separation
分離スイッチ
Switchfor PLSC

LV sideロケット側
ContactSurface
受け面
LV
on PL

3±0.5

Separation
plane
衛星分離面

Figure A3-7 Position of Separation Switch on PL side and Contact Surface on LV

A-10

Appendix A

7±0.5

Epsilon User’s Manual

PL side

衛星分離面
Separation
plane
衛星側受け面Contact Surface
on PL
SC
ロケット側
分離スイッチ

φ864

Separation
Switch for LV

ストローク
stroke3±1Free Length
Contact Surface 自由長
PLon衛星側受け面SC

7±0.5

Separation
plane
衛星分離面
LV side

ロケット側
Separation
分離スイッチ
Switchfor LV
φ864

Figure A3-8 Position of Separation Switch on LV side and Contact Surface on PL

A-11

Appendix A

Epsilon User’s Manual(7) Separation Spring
Table A3-5 shows the number of separation springs. The number will be decided by LSP according tothe mass of PL and the separation speed that varies for the LV configuration. The locations of separation
springs are shown in Figure A3-2.
If Customer requires any change in the number and location, contact your Program Director.
The load applied to PL’s rear flame by a separation spring during PL/LV mating is specified in Section(1).
Table A3-5 Number of Separation Springs

LV Configuration

Nominal Separation
Speed

Optional with PBS

0.5 m/s

Basic without PBS

2.0 m/s

Number of Separation Spring44, 8 or 12(Depends on the PL mass)

A-12

Appendix A

Epsilon User’s Manual

A4. Electrical Interface
A4. 1 Separation Connector
The standard characteristics of the separation connector are shown below.
The two separation connectors (UMB1 & UMB2) are different in keying/clocking to prevent incorrectconnection.
(1) Part Number
The part numbers of the separation connectors are shown in Table A4-1.
Table A4-1 Part numbers of Separation Connectors
Connector

Part No.

Manufacturer

Identification
PL side 1

UMBJ1

DBAS70 61-0SN-090

DEUTSCHPL side 2

UMBJ2

DBAS70 61-0SY-090

DEUTSCH

LV side 1

UMBP1

DBAS79 61-0PN

DEUTSCH

LV side 2

UMBP2

DBAS79 61-0PY

DEUTSCH(2) Location
See Figure A3-2.
(3) Shield Requirements
Shield requirements for the back shells and I/F harnesses are shown below.
Table A4-2 Shield Requirements
Shield Requirements
Back shell

N/AI/F harnesses

dependent on signals(4) Procurement
PL side connectors are provided by Customer, and LV side ones by LSP.
(5) Pin Assignment
The pin assignments of the separation connectors are determined for Customer. Table A4-3 andTable A4-4 show the typical pin assignments.

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Appendix A

Epsilon User’s Manual

Table A4-3 Typical Pin Assignment of UMBP1UMBP1 (Power)
Pin No.
2458
44
35
357
113425
1745
6455
1256
2633
46
162260
4237
959
2336
4319101840614138515247544853

Signal NamePower 1 (1)Power 1 RTN (1)Power 1 (2)Power 1 RTN (2)Power 1 (3)Power 1 RTN (3)Power 1 (4)Power 1 RTN (4)Power 1 (5)Power 1 RTN (5)Power 1 (6)Power 1 RTN (6)Power 1 (7)Power 1 RTN (7)Power 1 (8)Power 1 RTN (8)Power 1 (9)Power 1 RTN (9)Power 1 (10)Power 1 RTN (10)Power 2 (1)Power 2 RTN (1)Power 2 (2)Power 2 RTN (2)Power 2 (3)Power 2 RTN (3)Power 2 (4)Power 2 RTN (4)Power 2 (5)Power 2 RTN (5)Power 2 (6)Power 2 RTN (6)Power 2 (7)Power 2 RTN (7)Power 2 (8)Power 2 RTN (8)Separation Status
Separation Status RTN
SHIELDSHIELDPower 3 (Low Power)
Power 3 (Low Power) RTN

A-14

Appendix A

Epsilon User’s Manual

Table A4-4 Typical Pin Assignment of UMBP2UMBP2 (signal)
Pin No.

Signal Name

Pin No.

287191836
1735
47
48
57
58
342526
2728
1531
1632
2039
214033
3441
42
37
3860
6155
232443445152

Signal 1Signal 1 RTN
Signal 2Signal 2 RTN
Signal 3Signal 3 RTN
Signal 4Signal 4 RTN
Signal 5Signal 5 RTNSHIELDSHIELD
Signal 6Signal 6 RTN
Signal 7Signal 7 RTN
Signal 8Signal 8 RTN
Signal 9Signal 9 RTN
Signal 10Signal 10 RTN
Signal 11Signal 11 RTN
Signal 12Signal 12 RTN
Signal 13Signal 13 RTN
Signal 14Signal 14 RTN
Signal 15Signal 15 RTN
Signal 16Signal 16 RTN
SHIELD
Signal 17Signal 17 RTN
Signal 18Signal 18 RTN
Separation Detection
Separation Detection RTN495056131422469101112305645A-15Signal Name
Signal 19Signal 19 RTNSignal 20
Signal 20 RTN
Signal 21
Signal 21 RTN
Signal 22
Signal 22 RTN
Signal 23
Signal 23 RTN
Signal 24
Signal 24 RTN
Signal 25
Signal 25 RTNSHIELD

Appendix A

Epsilon User’s Manual

A4. 2 Separation Switch
For electrical interfaces of separation switches, refer to the specification sheet of M8805/80-01.

A-16