Difference between revisions of "MCE Power"

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The MCE power requirements are:
+
{{Related|Power}}
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{| border="1"
+
== Power Requirements ==
 +
There are two types of MCE [[subrack]]s:
 +
*MCE72: contains up-to 10 cards and can read up to 32 columns.  In the past, this also contained a power supply unit (PSU)
 +
*MCE48: contains up-to 7 cards and can read up to 16 columns.
 +
 
 +
The power requirements of typical subrack configurations are given below.  To compute power and current requirements for a particular configuration, use: http://e-mode.phas.ubc.ca/mce/cgi-bin/power.cgi .
 +
 
 +
{| class="wikitable" style="text-align: right"
 +
|-
 +
! colspan="2" | Configuration
 +
! rowspan="2" | MCE48<br>RC_RevE<BR>BC_RevF<sub>1</sub>
 +
! rowspan="2" | MCE72<br>RC_RevE<BR>BC_RevF<sub>0</sub>
 +
|-
 +
! colspan="2" | Voltage
 +
|-
 +
! V<sub>core</sub><sup>1</sup>
 +
|| 3.0V
 +
|| 3.2A
 +
|| 5.4A
 +
|-
 +
! V<sub>lvd</sub>
 +
|| 4.5V
 +
|| 2.9A
 +
|| 3.26A
 +
|-
 +
! V<sub>a+</sub>
 +
|| 6.2V
 +
|| 3.5A
 +
|| 6.4A
 +
|-
 +
! V<sub>a&minus;</sub>
 +
|| &minus;6.2V
 +
|| 1.0A
 +
|| 2.3A
 +
|-
 +
! V<sub>ah</sub><sup>2</sup>
 +
|| 10.0V
 +
|| &mdash;
 +
|| &mdash;
 +
|-
 +
! colspan="2" | Total Power
 +
| 50.1W
 +
| 85.0W
 +
|}
 +
<sup>1</sup>: Minimum V<sub>core</sub> supply for older version of cards can be as low as 2.5V, but newer RC and BC require minimum 3V[[Minimum Vcore for RC RevE| see note]].  The numbers in this table assume a V<sub>core</sub> of 3V.
 +
<br><sup>2</sup>: The 10V V<sub>ah</sub> supply is only used when Readout Card Rev. B (or older) or Bias Card Rev. D (or older) are present in the subrack. V<sub>ah</sub> was used to generate reference voltages for DACs.<br>
 +
<sup>3</sup>: When using mux11d squid chips, unused DACs on Address Card can be turned off and 1 Bias Card can be eliminated. This will amount to 10W of power savings.
 +
 
 +
For card specific power requirements, see [[MCE Card Specific Power Requirements]]
 +
 
 +
== Connector & pinout ==
 +
The MCE uses [http://cdmelectronics.com/wp-content/uploads/2014/07/MRA_SERIES.pdf Winchester MRA-34P-G] on the front panel.
 +
 
 +
{| class="wikitable" style="text-align: center"
 
|-
 
|-
−
| +V<sub>core</sub>
+
| width="25%" | &nbsp;
 +
| width="25%" rowspan="2" style="background: #CCC" | '''A'''<br>+V<sub>ah</sub><sup>*</sup> +10V
 +
| width="25%" | &nbsp;
 +
| width="25%" rowspan="2" style="background: #444; color: white" | '''B'''<br>AGND
 +
|-
 +
| rowspan="2" style="background: #88F" | '''C'''<br>&minus;V<sub>a</sub> &minus;6.2V
 +
| rowspan="2" style="background: #444; color: white" | '''D'''<br>AGND
 +
|-
 +
| rowspan="2" style="background: #FD4" | '''E'''<br>+V<sub>a</sub> +6.2V
 +
| rowspan="2" style="background: #222; color: white" | '''F'''<br>AGND
 +
|-
 +
| rowspan="2" style="background: #FD4" | '''H'''<br>+V<sub>a</sub> +6.2V
 +
| rowspan="2" style="background: #222; color: white" | '''J'''<br>AGND
 +
|-
 +
| rowspan="2" style="background: #FD4" | '''K'''<br>+V<sub>a</sub> +6.2V
 +
| rowspan="2" style="background: #222; color: white" | '''L'''<br>AGND
 +
|-
 +
| rowspan="2" style="background: #FD4" | '''M'''<br>+V<sub>a</sub> +6.2V
 +
| rowspan="2" style="background: #666; color: white" | '''N'''<br>DGND
 +
|-
 +
| rowspan="2" style="background: #F44" | '''P'''<br>+V<sub>lvd</sub> +4.5V
 +
| rowspan="2" style="background: #666; color: white" | '''R'''<br>DGND
 +
|-
 +
| rowspan="2" style="background: #F44" | '''S'''<br>+V<sub>lvd</sub> +4.5V
 +
| rowspan="2" style="background: #666; color: white" | '''T'''<br>DGND
 +
|-
 +
| rowspan="2" style="background: #F44" | '''U'''<br>+V<sub>lvd</sub> +4.5V
 +
| rowspan="2" style="background: #444; color: white" | '''V'''<br>DGND
 +
|-
 +
| rowspan="2" style="background: #4C4" | '''W'''<br>+V<sub>core</sub> +3.0V
 +
| rowspan="2" style="background: #444; color: white" | '''X'''<br>DGND
 +
|-
 +
| rowspan="2" style="background: #4C4" | '''Y'''<br>+V<sub>core</sub> +3.0V
 +
| rowspan="2" style="background: #444; color: white" | '''Z'''<br>DGND
 +
|-
 +
| rowspan="2" style="background: #4C4" | '''a'''<br>+V<sub>core</sub> +3.0V
 +
| rowspan="2" style="background: #444; color: white" | '''b'''<br>DGND
 +
|-
 +
| rowspan="2" style="color: #888" | '''c'''<br>CC_SREQ<sup>&dagger;</sup>
 +
| rowspan="2" style="color: #888" | '''d'''<br>PS_MOSI<sup>&dagger;</sup>
 +
|-
 +
| rowspan="2" | '''f'''<br>Fan GND<sup>&Dagger;</sup>
 +
| rowspan="2" style="color: #888" | '''g'''<br>BRST<sup>&dagger;</sup>
 +
|-
 +
| rowspan="2" style="color: #888" | '''h'''<br>CC_MISO<sup>&dagger;</sup>
 +
| rowspan="2" style="color: #888" | '''i'''<br>PS_SCLK<sup>&dagger;</sup>
 +
|-
 +
| rowspan="2" | '''j'''<br>Fan +12V<sup>&Dagger;</sup>
 +
| rowspan="2" style="color: #888" | '''k'''<br>PS_CS<sup>&dagger;</sup>
 +
|-
 +
| rowspan="2" style="color: #888" | '''m'''<br>SIG_RET<sup>&dagger;</sup>
 +
| rowspan="2" style="color: #888" | '''n'''<br>SIG_RET<sup>&dagger;</sup>
 +
|-
 +
| &nbsp;
 +
| &nbsp;
 +
|}
 +
'''*''': Obsolete: V<sub>ah</sub> is used only by revB [[Readout Card]]s and revD [[Bias Card]]s (or earlier)<br>
 +
'''&dagger;''': Obsolete: was used to communicate with the [[PSUC]].<br>
 +
'''&Dagger;''': Optional power lines for subrack top plate fans.
 +
 
 +
Full details can be found under Winchester connector, here: [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/ELE-C585-301C_MCE48_Front_Panel_Power_Connection.pdf 48HP Front-Panel Power Connection]
 +
 
 +
Note that the older 5-MDM SCUBA-2 style MCE had 2 Circular Amphenol connectors on the front panel of the [[linear feed card]]. Pinout is here: [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/Figure%206%20Rear%20View%20of%20pinout_AMPHENOL%20size%2022_RevC.xls Amphenol pinout].  The linear-feed card connects power from these circular connectors to the Winchester power connector on the back panel.
 +
 
 +
schematics for Winchester-Winchester cable to connect MCE to a Vicor supply is listed here: [https://phas.ubc.ca/~mce/mcedocs/hardware/schematics/PowerSupplyVicor/ELE-C58X-303A_MCE_Vicor_Winchester_Cable_Revised_July13_2018.pdf]
 +
 
 +
== Powering up an MCE==
 +
There are different solutions for powering up an MCE. A straight-forward method for all ground-based experiments is to use linear supplies configured to satisfy the above requirements.
 +
=== Vicor Switching Supplies (24V-in) ===
 +
The MCE can alternatively be equipped with a 18&ndash;36Vin (24Vin nominal) switching supply designed for use in balloon-based experiments. It uses Vicor bricks. :''See [[Vicor Power Supply]]''
 +
 
 +
=== Linear Supplies ===
 +
The set of linear supplies listed below (or similar supplies) are suitable.
 +
 
 +
==== Option 1 ====
 +
 
 +
{| class="wikitable"
 +
|-
 +
! +V<sub>core</sub>
 +
|| IHC5-6/OVP (adjustable)
 
|| 3V
 
|| 3V
 
|| 5A
 
|| 5A
 
|-
 
|-
−
| +V<sub>lvd</sub>
+
! +V<sub>lvd</sub>
 +
|| IHB5-3/OVP
 
|| 4.5V
 
|| 4.5V
 
|| 3A
 
|| 3A
 
|-
 
|-
−
| +V<sub>a</sub>
+
! +V<sub>a</sub>
 +
|| IHE5-18/OVP
 
|| 6.2V
 
|| 6.2V
 
|| 15A
 
|| 15A
 
|-
 
|-
−
| -V<sub>a</sub>
+
! &minus;V<sub>a</sub>
 +
|| IHB5-3/OVP
 
|| -6.2V
 
|| -6.2V
 
|| 2A
 
|| 2A
 
|-
 
|-
−
| +V<sub>ah</sub> <sup>1</sup>
+
! +V<sub>ah</sub><sup>1</sup>
 +
|| IHA15-0.5
 
|| 10V
 
|| 10V
 
|| 0.1A
 
|| 0.1A
 
|-
 
|-
 
|}
 
|}
−
<sup>1</sup>: 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack. 10V was used to generate reference voltages for DACs.
+
<sup>1</sup>: +V<sub>ah</sub> or 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack.  
 +
* Open-Frame PSU [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/SC2-ELE-C585-500_RevB_Linear_Open_Frame_PSU_Wiring.pdf  Wiring], [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/SC2-ELE-C585-501A_Linear_Open_Frame_PS_BOM.pdf Bill-of-Materials], [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/SC2-ELE-C585-501A_Linear_Open_Frame_Assembly_Instruction.pdf  Assembly Instructions]
 +
* MCE-to-PS Cable [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/ELE-C585-501_RevA_Cable_Linear_Open_Frame.pdf Wiring] , [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/ELE-C585-501_RevA_Cable_Linear_Open_Frame_BOM.pdf Bill-of-Material]
  
−
There are different solutions for powering up an MCE.
+
==== Option 2 ====
−
 
+
[[File:Linear_supply_prehistory.JPG|thumb|Linear Supply Assembly - obsolete]]
−
; Linear Supplies
+
{| class="wikitable"
−
A straight-forward method is to use linear supplies configured to satisfy the above requirements. In that case the MCE has to be equipped with the right Linear-Feed connector in the front.
+
|-
−
 
+
! +V<sub>core</sub>
−
The 5-MDM MCE (72HP, SCUBA2 style) has 2 Circular Amphenol connectors in the front panel. Pinout is here:[http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/Figure%206%20Rear%20View%20of%20pinout_AMPHENOL%20size%2022_RevC.xls Amphenol pinout]] 
+
|| Kepco JQE 6-22M (adjustable)
 +
|-
 +
! +V<sub>lvd</sub>
 +
|| Power One HC5-6/OVP
 +
|-
 +
! +V<sub>a</sub>
 +
|| Kepco JQE 15-25M (adjustable)
 +
|-
 +
! &minus;V<sub>a</sub>
 +
|| Kepco JQE 15-25M (adjustable)
 +
|-
 +
! +V<sub>ah</sub><sup>1</sup>
 +
|| Power One HAD15-0.4-A
 +
|-
 +
|}
  
−
The 3-MDM MCE (48HP, Spider Style) has a Winchester MRA-34P-G connector in the front panel. Pinout can be found under Winchester connector, here : [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/48HP%20PSU%20Connector-C585-301-%20Rev%20B.pdf 48HP PSU Connector]
+
<sup>1</sup>: +V<sub>ah</sub> or 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack.  
−
The Winchester connector is to be used with either linear supplies or switching supply (PSA). When using linear supplies, you can ignore connections that are "white" on that pinout. Those lines are few digital lines to monitor voltages of the switching supply and unused when used with Linear supplies.
 
  
−
As an example, here is how we setup our linear supplies in the lab. [Tom's Schematics and instructions]
+
As a slightly out-of-date example, here is how we setup our linear supplies in the lab (for 1 MCE).  
  
−
;Switching Supplies (AC-powered)
+
* [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/ELE-C58J-001_Linear_PS_Wiring.pdf  Linear_PS Wiring Diagram]
  
−
The MCE can be equipped with a switching supply (PSA) that is powered through a front-panel Amphenol connector that takes +-150V DC. The +-150V is generated by an external AC-DC unit that can reside far from the MCE. The ACDC unit is designed and supplied by UBC.
+
* [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/ELE-C58J-501_External_Linear_PS_Manual.pdf  Linear PS Assembly Instructions ]
  
−
So far, there has only been one incident that the switching noise was reported to be unacceptable.
+
=== AC-powered Switching Supplies (obsolete) ===
 +
[[Image:External_PSU_Setup.JPG|thumb|A 3-MDM 48HP [[subrack]] powered by an external [[PSA]] (labelled PSU) attached to an [[ACDCU]].]]
  
−
See picture of 5-MDM MCE (72HP) powered by PSA+ACDCU[]
+
The MCE can be equipped with a switching supply ([[PSA]]) that is powered through a front-panel Amphenol connector that takes &plusmn;150V DC. The &plusmn;150V is generated by an external [[AC-DC Unit]] (ACDCU) that can reside far from the MCE. The ACDCU is designed and supplied by UBC.
  
−
See picture of 3-MDM MCE (48HP) powered by PSA+ACDCU[1 MCE48 front view][MCE48 AC-powered switching supply setup]
+
The PSA is equipped with a controller card ([[PSUC]]) that allows monitoring voltage/current levels of the MCE by issuing a command from the MCE control PC. See <tt>[[psc_status]]</tt>.
  
−
;Switching Supplies (24V-in)
+
This solution is obsolete and no longer in production.  Ground-based experiments should use linear supplies.  For balloon-based experiments, use the 24-V Vicor supply.
  
−
The MCE can alternatively be equipped with a 24V-in Switching supply to be used in balloon-based experiments. We are currently debugging the prototype design.
+
[[Category:Power| ]]

Latest revision as of 18:26, 17 March 2021

Power Requirements

There are two types of MCE subracks:

  • MCE72: contains up-to 10 cards and can read up to 32 columns. In the past, this also contained a power supply unit (PSU)
  • MCE48: contains up-to 7 cards and can read up to 16 columns.

The power requirements of typical subrack configurations are given below. To compute power and current requirements for a particular configuration, use: http://e-mode.phas.ubc.ca/mce/cgi-bin/power.cgi .

Configuration MCE48
RC_RevE
BC_RevF1 		MCE72
RC_RevE
BC_RevF0
Voltage
Vcore1 3.0V 3.2A 5.4A
Vlvd 4.5V 2.9A 3.26A
Va+ 6.2V 3.5A 6.4A
Va− −6.2V 1.0A 2.3A
Vah2 10.0V — —
Total Power 50.1W 85.0W

1: Minimum Vcore supply for older version of cards can be as low as 2.5V, but newer RC and BC require minimum 3V see note. The numbers in this table assume a Vcore of 3V.
2: The 10V Vah supply is only used when Readout Card Rev. B (or older) or Bias Card Rev. D (or older) are present in the subrack. Vah was used to generate reference voltages for DACs.
3: When using mux11d squid chips, unused DACs on Address Card can be turned off and 1 Bias Card can be eliminated. This will amount to 10W of power savings.

For card specific power requirements, see MCE Card Specific Power Requirements

Connector & pinout

The MCE uses Winchester MRA-34P-G on the front panel.

  A
+Vah* +10V 		  B
AGND
C
−Va −6.2V 		D
AGND
E
+Va +6.2V 		F
AGND
H
+Va +6.2V 		J
AGND
K
+Va +6.2V 		L
AGND
M
+Va +6.2V 		N
DGND
P
+Vlvd +4.5V 		R
DGND
S
+Vlvd +4.5V 		T
DGND
U
+Vlvd +4.5V 		V
DGND
W
+Vcore +3.0V 		X
DGND
Y
+Vcore +3.0V 		Z
DGND
a
+Vcore +3.0V 		b
DGND
c
CC_SREQ† 		d
PS_MOSI†
f
Fan GND‡ 		g
BRST†
h
CC_MISO† 		i
PS_SCLK†
j
Fan +12V‡ 		k
PS_CS†
m
SIG_RET† 		n
SIG_RET†
   

*: Obsolete: Vah is used only by revB Readout Cards and revD Bias Cards (or earlier)
†: Obsolete: was used to communicate with the PSUC.
‡: Optional power lines for subrack top plate fans.

Full details can be found under Winchester connector, here: 48HP Front-Panel Power Connection

Note that the older 5-MDM SCUBA-2 style MCE had 2 Circular Amphenol connectors on the front panel of the linear feed card. Pinout is here: Amphenol pinout. The linear-feed card connects power from these circular connectors to the Winchester power connector on the back panel.

schematics for Winchester-Winchester cable to connect MCE to a Vicor supply is listed here: [1]

Powering up an MCE

There are different solutions for powering up an MCE. A straight-forward method for all ground-based experiments is to use linear supplies configured to satisfy the above requirements.

Vicor Switching Supplies (24V-in)

The MCE can alternatively be equipped with a 18–36Vin (24Vin nominal) switching supply designed for use in balloon-based experiments. It uses Vicor bricks. :See Vicor Power Supply

Linear Supplies

The set of linear supplies listed below (or similar supplies) are suitable.

Option 1

+Vcore IHC5-6/OVP (adjustable) 3V 5A
+Vlvd IHB5-3/OVP 4.5V 3A
+Va IHE5-18/OVP 6.2V 15A
−Va IHB5-3/OVP -6.2V 2A
+Vah1 IHA15-0.5 10V 0.1A

1: +Vah or 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack.

Option 2

Linear Supply Assembly - obsolete
+Vcore Kepco JQE 6-22M (adjustable)
+Vlvd Power One HC5-6/OVP
+Va Kepco JQE 15-25M (adjustable)
−Va Kepco JQE 15-25M (adjustable)
+Vah1 Power One HAD15-0.4-A

1: +Vah or 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack.

As a slightly out-of-date example, here is how we setup our linear supplies in the lab (for 1 MCE).

AC-powered Switching Supplies (obsolete)

A 3-MDM 48HP subrack powered by an external PSA (labelled PSU) attached to an ACDCU.

The MCE can be equipped with a switching supply (PSA) that is powered through a front-panel Amphenol connector that takes ±150V DC. The ±150V is generated by an external AC-DC Unit (ACDCU) that can reside far from the MCE. The ACDCU is designed and supplied by UBC.

The PSA is equipped with a controller card (PSUC) that allows monitoring voltage/current levels of the MCE by issuing a command from the MCE control PC. See psc_status.

This solution is obsolete and no longer in production. Ground-based experiments should use linear supplies. For balloon-based experiments, use the 24-V Vicor supply.

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