Difference between revisions of "MCE Power"

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−
There are different solutions for powering up an MCE.
+
{{Related|Power}}
 +
== 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.
  
−
;Linear Supplies
+
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 .
−
A straight-forward method is to use linear supplies:
 
−
: 3V @ 5A (3.3V OK)
 
−
: 4.5V @ 3A (5.0V OK)
 
−
: 6.3V @ 15A (7.0V OK)
 
−
: -6.3V @ 2A (-7.0V OK)
 
−
: 10.0V @ 1A (15.0V OK)
 
  
−
Note: 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.
+
{| 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.
  
−
;Switching Supplies: PSU + ACDCU
+
For card specific power requirements, see [[MCE Card Specific Power Requirements]]
  
−
The MCE can be equipped with a switching supply (PSA) that is powered by +-150V DC generated by an external AC-DC unit that can reside far from the MCE and is also supplied by UBC.
+
== Connector & pinout ==
 +
The MCE uses [http://cdmelectronics.com/wp-content/uploads/2014/07/MRA_SERIES.pdf Winchester MRA-34P-G] on the front panel.
  
−
So far, there has only been one incident that the switching noise was reported to be unacceptable.
+
{| class="wikitable" style="text-align: center"
 +
|-
 +
| 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
 +
|| 5A
 +
|-
 +
! +V<sub>lvd</sub>
 +
|| IHB5-3/OVP
 +
|| 4.5V
 +
|| 3A
 +
|-
 +
! +V<sub>a</sub>
 +
|| IHE5-18/OVP
 +
|| 6.2V
 +
|| 15A
 +
|-
 +
! &minus;V<sub>a</sub>
 +
|| IHB5-3/OVP
 +
|| -6.2V
 +
|| 2A
 +
|-
 +
! +V<sub>ah</sub><sup>1</sup>
 +
|| IHA15-0.5
 +
|| 10V
 +
|| 0.1A
 +
|-
 +
|}
 +
<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]
 +
 
 +
==== Option 2 ====
 +
[[File:Linear_supply_prehistory.JPG|thumb|Linear Supply Assembly - obsolete]]
 +
{| class="wikitable"
 +
|-
 +
! +V<sub>core</sub>
 +
|| 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
 +
|-
 +
|}
 +
 
 +
<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.
 +
 
 +
As a slightly out-of-date example, here is how we setup our linear supplies in the lab (for 1 MCE).
 +
 
 +
* [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/ELE-C58J-001_Linear_PS_Wiring.pdf  Linear_PS Wiring Diagram]
 +
 
 +
* [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/ELE-C58J-501_External_Linear_PS_Manual.pdf  Linear PS Assembly Instructions ]
 +
 
 +
=== 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]].]]
 +
 
 +
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.
 +
 
 +
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>.
 +
 
 +
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.
 +
 
 +
[[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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