| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 4.1 | Copy Location | DELNI::BUZZELL | | Wed Aug 17 1994 17:54 | 7 |
|
The table is also available in the public directory at
NAC::NIPG:[hub]power.txt if you want to copy it to print.
|
| 4.2 | | GRANPA::DFAUST | Bad Things, man... | Fri Feb 03 1995 14:16 | 10 |
|
I have configured a DEChub 900 with one DETMM, one DEFBA and six DSRVZ.
Using the numbers from 4.0, I should only nees two power supplies, or 3
for N+1. However, when I power it up, it requires three power supplies
for total operation, or 4 for N+1. Have some of the numbers changed, or
are some of my components drawing more current that they should?
Dennis Faust
|
| 4.3 | Could be your HUB doesn't have latest code... | NETCAD::BATTERSBY | | Fri Feb 03 1995 14:27 | 7 |
| It seems that I recall hearing from one of the MAM guru's here
that there are differences in how the MAM calculates power allocation
depending on whether it has wave 2 code (3.1) compared to older
rev code, so you might want to make sure you have the current
shipping rev of MAM code in your HUB.
Bob
|
| 4.4 | | GRANPA::DFAUST | Bad Things, man... | Fri Feb 03 1995 14:31 | 4 |
| Nope, that's not it. I'm running 3.1 on the Hub.
Dennis Faust
|
| 4.5 | OK - ONE Possibility | CONSLT::BUZZELL | | Wed Feb 08 1995 12:35 | 18 |
|
Just tried your configuration in the lab. It works as expected
with 2 power supplies. There is 5 watts still available.
I suspect that in handling or installation some pins may have
been bent on 1 of the supplies. The AC and DC OK lights will still
come on but the hub manager won't recognize the power. You can test
this even in a production state by turning off one supply and see if
the available power changes. If it does then turn that supply back on
and turn the next 1 off. Look for the state not to change when you
turn one of them off. If that happens you can remove it to check it
without affecting operations.
That said I will leave it to your judgement whether the one less
supply is really in your customers best interest. In this config you
are using 275 of 280 available watts or 98.2% of available. Now it
doesn't leave much margin for error with even a small variance.
|
| 4.6 | Oops forgot | CONSLT::BUZZELL | | Wed Feb 08 1995 12:37 | 6 |
|
One thing I forgot to mention in the last note always wait at
least 10 seconds between each instance of turning on and off to
allow the power to stabilize.
|
| 4.7 | What about power consumption of mod PMDs? | 36932::STUART | Scott Stuart - NPB SE - 410.315.9954 | Wed Mar 22 1995 11:55 | 7 |
| The DEF6X states 42.5 watts - what is the effect of having 6 * DEFXM or
in other words a DEF6M.
So do the PMDs take any additonal power or does the 42.5 include them?
thanks
...scott
|
| 4.8 | DEF6X Conc +6 PMDs = 47.5w | NETCAD::BATTERSBY | | Wed Mar 22 1995 16:41 | 7 |
| >So do the PMDs take any additonal power or does the 42.5 include them?
Well, I plugged a DEF6X into an empty backplane which had 125w
available, and when the concentrator came up there were 77.5
available, so the concentrator with 6 MIC PMDs uses 47.5w.
Bob
|
| 4.9 | | GRANPA::DFAUST | Bad Things, man... | Wed Apr 12 1995 19:17 | 7 |
| Is there an updated power use table for the newly announced DEChub
products, like the port switch modules and the new FDDI concentrator?
I'm trying to work out a config and would like to properly config the
PS.
Dennis Faust
|
| 4.10 | Note 2250.1 | SNOFS1::KHOOJEANNIE | | Tue May 30 1995 20:00 | 3 |
| There is some preliminary info on the PORTswitch in Note 2250.1.
Jeannie
|
| 4.11 | Power/BTU/48Volt/all-in-1 | PTOJJD::DANZAK | Pittsburgher � | Mon Jun 19 1995 12:53 | 180 |
| I took the power note, some other power notes, and BTU note and
combined them all. Needed it for a customer so I thought I'd post this
for others to use.
ttfn,
j
DEChub 900 MultiSwitch Power Table
DEChub 900 System Power Table__________________________________
Component_______________+5_V______+15_V______Tot. W.___
________________________________________________________________
PS Module_______________________________________________________
PS 140 W
(delivered)(ea.) 26.0 4.0 140
________________________________________________________________
Platform MAXIMUM _______________________________________________
(3supplies with
4th redundant)
Total usable 78.0 12.0 420
________________________________________________________________
Platform________________________________________________________
900 MS Platform 3.0 0 15
________________________________________________________________
Component_______________+5_V______+15_V_______Tot. W.___
All Half-Height (90s)
Modules, No AUI 1.4 0.0 7
DECbridge 90, 90FL 1.4 0.75 18.3
DECrepeater 90FA 1.4 0.5 14.5
DECagent 90 1.4 0.5 14.5
DEFMM (12 port FO Rep) 8.0 0.5 47.5
DETTM (Telco Repeater) 4.0 1.0 35
DETMM (32 p Repeater) 4.0 0.5 27.5
DETMI (HH 8 p Repeater 1.2 0.0 6.0
DEFMI (HH 3 p Repeater) 1.5 0.5 15
DSRVZ (32 p T Server) 4.0 0.5 27.5
DEF6X (FDDI WC) 7.0 0.5 42.5
DEFBA(WGE200)DECbridge 9.0 1.5 67.5
6 port Ethernet/FDDI
DEBMP(WGE100)DECswitch 8.0 1.5 62.5
6 port Ethernet
DESBF(PE200)PEswitch 8.0 0.7 50.5
6 port Ethernet/FDDI
Portswitch 900TP (DETPJ)
32 port Ethernet 6.0 0.5 37.5
Portswitch 900CP (DECPM)
12 port 10-base-2 8.0 0.5 47.5
NOTE: Since the power supplies can current share on their outputs
a configuration must be checked for maximum 5 and 15 Volt
current usage AND also the maximum power (W).
NOTE: All modules consume some minimum of 12volts, modules which
need 12 volts for AUI connections generate the 12 from the
15 volt power. You do not need to consider this in power
consumption for each module. The 5 and 15 volts are all that is
needed.
Table A-8 Electrical Specs from DEChub manual
----------------------------
input voltage - 88 to 264 volts auto-ranging
line freq - 50 to 60 hz
input current - less than 10 amps
max heat diss - 730w
max input power - 1000VA
consumption
(Another way to guage is is EACH power supply delivers 165 Watts. 3
power supplies yields 495 watts. 495 watts at 120volts = 4.125Amps
or thereabouts as a rule of thumb)
For BTU output:
Conversion factor of watts to BTU/hr = 3.41443
Multiply the above by total watts output to get BTU/Hour
Some BTU output calculated is:
900hub 15.0W x 3.41443 (BTU/hr)/W = 51 BTU/hr
DEFMM 47.5 3.41443 162
DETTM 35.0 3.41443 120
DETMM 27.5 3.41443 94
DETMI 6.0 3.41443 21
DEFMI 15.0 3.41443 51
DSRVZ 27.5 3.41443 94
DEF6X 42.5 3.41443 145
DEFBA 67.5 3.41443 231
DEBMP 62.5 3.41443 213
DESBF 50.5 3.41443 172
Example of power calculation:
900 MS System with 2 half height, 2 repeaters
(32 port), 1 DEFMM FO module and a multiport bridge
900 MS Platform 3.0 0 15
DEFBA 9.0 1.5 67.5
DETMM 4.0 0.5 27.5
DETMM 4.0 0.5 27.5
DEFMM Repeater FO 8.0 0.5 47.5
90 Module, No AUI 1.4 0.0 7
DECrepeater 90FA 1.4 0.5 14.5
------------------------------------------------------------
30.8 3.5 206.5
need 2 power supplies for this config
need 3 total if N+1 system is desired.
NOTES: (Good guesses for configs):
One supply is enough for any system with half-height modules
if the number of AUIs used is 7 or less.
Two supplies are generally needed when more than 1 or 2 full-height
modules are used.
Three supplies will work for any configuration of existing modules,
except a hub full of the DEFBA(WGE200),or the DEBMP(WGE100) and the
fourth PS is used for N+1 redundancy.
Note that if you want to you can power the DEChub from 48V externally.
The external 48V Input characteristics for a DEChub900 system are as follows:
Min Voltage = 40 VDC
Max Voltage = 54 VDC
Maximum Input Ripple Voltage = 1.0 Vrms
Max current (@40 VDC) = 4.6 Arms
The environmental specification for the DEChub900 system operating from
a 48 VDC input is no different than that of an AC powered DEChub900
system (40 degrees C maximum ambient temperature).
The DEChub900 power system is designed to run off either AC line
or 48v DC. This is accomplished by a two stage power supply
design, as shown below.
|----------------|
AC Line --->| AC/DC-+--DC/DC |---> DC Outputs
| | |--->
|-------|--------|
|
^
48 V
The DC/DC section of the supply will accept either input (AC/DC output
or ext 48V). The method we chose to always use AC when it's available is
to have the AC/DC output be at 50V and the ext 48V supply at a lower
voltage (say 48V). Therefore, when both the ext 48V and AC are
operational, the system will use AC power.
A couple of observations:
1. An external conditioner will be required to ensure that the
external 48V remains below 50V. Typical US 48V telco system
vary from 40-60 volts. Once the system detects loss of AC
(ie, backup mode), this voltage can rise to 54 volts.
2. If a user wants to solely run off 48 V (that is, no AC presnt)
a external supply can be used that meets the specs of reply .1.
-----
|
| 4.12 | Consider... | NETCAD::HERTZBERG | History: Love it or Leave it! | Mon Jun 19 1995 13:20 | 16 |
| >> NOTE: All modules consume some minimum of 12volts, modules which
>> need 12 volts for AUI connections generate the 12 from the
>> 15 volt power. You do not need to consider this in power
>> consumption for each module. The 5 and 15 volts are all that is
>> needed.
Not precisely true. For example, the DETMI consumes zero 12V current.
Also, this is not a good blanket statement because typical new designs
will not consume 12V current (because the 12V Flash programming supply
is not needed on the new generation of Flash devices we will be using).
The DEFMI does not generate the 12V AUI current from the 15V supply...
it cannot because it does not have access to the 15V supply. It takes
the AUI current directly from the hub.
|
| 4.13 | just consider the �5v anyway... | ACIS01::JONES | Alf � | Tue Jun 20 1995 23:26 | 7 |
| It doesn't matter, because according to Mike Soha the �5 volt ratings
will take that into account - so just deal with them and you don't need
to think of the 12 volt rating.
ttfn,
j
|
| 4.14 | | NETCAD::HERTZBERG | History: Love it or Leave it! | Wed Jun 21 1995 11:54 | 9 |
| There is no -5V rating, so I'm not sure what you're talking about there.
I would agree, however, that the 12V current rating of a module is not
generally something which needs alot of attention paid to it... in
99.9% of the cases, it is insignificantly small and is accounted for in
the 15V power system design.
I was just trying to give precise information.
Marc
|
| 4.15 | DEChub power/BTU & 48V input | PTOJJD::DANZAK | Pittsburgher � | Wed Oct 18 1995 10:10 | 223 |
| I updated my original "all inclusive" power notes with the 48V pinout.
DEChub 900 MultiSwitch Power Table
DEChub 900 System Power Table__________________________________
Component_______________+5_V______+15_V______Tot. W.___
________________________________________________________________
PS Module_______________________________________________________
PS 140 W
(delivered)(ea.) 26.0 4.0 140
________________________________________________________________
Platform MAXIMUM _______________________________________________
(3supplies with
4th redundant)
Total usable 78.0 12.0 420
________________________________________________________________
Platform________________________________________________________
900 MS Platform 3.0 0 15
________________________________________________________________
Component_______________+5_V______+15_V_______Tot. W.___
All Half-Height (90s)
Modules, No AUI 1.4 0.0 7
DECbridge 90, 90FL 1.4 0.75 18.3
DECrepeater 90FA 1.4 0.5 14.5
DECagent 90 1.4 0.5 14.5
DEFMM (12 port FO Rep) 8.0 0.5 47.5
DETTM (Telco Repeater) 4.0 1.0 35
DETMM (32 p Repeater) 4.0 0.5 27.5
DETMI (HH 8 p Repeater 1.2 0.0 6.0
DEFMI (HH 3 p Repeater) 1.5 0.5 15
DSRVZ (32 p T Server) 4.0 0.5 27.5
DEF6X (FDDI WC) 7.0 0.5 42.5
DEFBA(WGE200)DECbridge 9.0 1.5 67.5
6 port Ethernet/FDDI
DEBMP(WGE100)DECswitch 8.0 1.5 62.5
6 port Ethernet
DESBF(PE200)PEswitch 8.0 0.7 50.5
6 port Ethernet/FDDI
Portswitch 900TP (DETPJ)
32 port Ethernet 6.0 0.5 37.5
Portswitch 900CP (DECPM)
12 port 10-base-2 8.0 0.5 47.5
NOTE: Since the power supplies can current share on their outputs
a configuration must be checked for maximum 5 and 15 Volt
current usage AND also the maximum power (W).
NOTE: All modules consume some minimum of 12volts, modules which
need 12 volts for AUI connections generate the 12 from the
15 volt power. You do not need to consider this in power
consumption for each module. The 5 and 15 volts are all that is
needed.
Table A-8 Electrical Specs from DEChub manual
----------------------------
input voltage - 88 to 264 volts auto-ranging
line freq - 50 to 60 hz
input current - less than 10 amps
max heat diss - 730w
max input power - 1000VA
consumption
(Another way to guage is is EACH power supply delivers 165 Watts. 3
power supplies yields 495 watts. 495 watts at 120volts = 4.125Amps
or thereabouts as a rule of thumb)
For BTU output:
Conversion factor of watts to BTU/hr = 3.41443
Multiply the above by total watts output to get BTU/Hour
Some BTU output calculated is:
900hub 15.0W x 3.41443 (BTU/hr)/W = 51 BTU/hr
DEFMM 47.5 3.41443 162
DETTM 35.0 3.41443 120
DETMM 27.5 3.41443 94
DETMI 6.0 3.41443 21
DEFMI 15.0 3.41443 51
DSRVZ 27.5 3.41443 94
DEF6X 42.5 3.41443 145
DEFBA 67.5 3.41443 231
DEBMP 62.5 3.41443 213
DESBF 50.5 3.41443 172
Example of power calculation:
900 MS System with 2 half height, 2 repeaters
(32 port), 1 DEFMM FO module and a multiport bridge
900 MS Platform 3.0 0 15
DEFBA 9.0 1.5 67.5
DETMM 4.0 0.5 27.5
DETMM 4.0 0.5 27.5
DEFMM Repeater FO 8.0 0.5 47.5
90 Module, No AUI 1.4 0.0 7
DECrepeater 90FA 1.4 0.5 14.5
------------------------------------------------------------
30.8 3.5 206.5
need 2 power supplies for this config
need 3 total if N+1 system is desired.
NOTES: (Good guesses for configs):
One supply is enough for any system with half-height modules
if the number of AUIs used is 7 or less.
Two supplies are generally needed when more than 1 or 2 full-height
modules are used.
Three supplies will work for any configuration of existing modules,
except a hub full of the DEFBA(WGE200),or the DEBMP(WGE100) and the
fourth PS is used for N+1 redundancy.
Note that if you want to you can power the DEChub from 48V externally.
The external 48V Input characteristics for a DEChub900 system are as follows:
Min Voltage = 40 VDC
Max Voltage = 54 VDC
Maximum Input Ripple Voltage = 1.0 Vrms
Max current (@40 VDC) = 4.6 Arms
The environmental specification for the DEChub900 system operating from
a 48 VDC input is no different than that of an AC powered DEChub900
system (40 degrees C maximum ambient temperature).
The DEChub900 power system is designed to run off either AC line
or 48v DC. This is accomplished by a two stage power supply
design, as shown below.
|----------------|
AC Line --->| AC/DC-+--DC/DC |---> DC Outputs
| | |--->
|-------|--------|
|
^
48 V
The DC/DC section of the supply will accept either input (AC/DC output
or ext 48V). The method we chose to always use AC when it's available is
to have the AC/DC output be at 50V and the ext 48V supply at a lower
voltage (say 48V). Therefore, when both the ext 48V and AC are
operational, the system will use AC power.
A couple of observations:
1. An external conditioner will be required to ensure that the
external 48V remains below 50V. Typical US 48V telco system
vary from 40-60 volts. Once the system detects loss of AC
(ie, backup mode), this voltage can rise to 54 volts.
2. If a user wants to solely run off 48 V (that is, no AC presnt)
a external supply can be used that meets the specs.
Amp Part # 748474-1 used to connect to the hub,
(mates with the AMP 1-748481-5 on the base hub)
These are high density mini sub-D with 26 connectors.
Use AWG22 wire to connect! This is imperative as any other guage will not
support the current load over an extended period of time:
Pins 7,8,9 and 16 to +48
Pins 17,18,24,25,26 to -48
You should use one 48V source and tie all the +48V pins together and all
the -48V pins together.
Do not connect any other pins than the �48 volt pins! They had other uses
planned and are interconnected with hub management. Connecting them could
damage the hub manager and/or fail the hub!
The exact pinouts are (ignore any non 48V ones for your purposes):
Pin # Signal Name
----- -----------
1 PM_2 H
2 PM_1 H
3 PM_3 H
4 PM_ALE H
5 PM_RW H
6 NO CONNECTION
7 +48V
8 +48V
9 +48V
10 BBU_REQ L
11 PM_DS H
12 PM_4 H
13 +5V
14 NO CONNECTION
15 NO CONNECTION
16 +48V
17 48V_RTN (-48V)
18 48V_RTN (-48V)
19 BAT_EN H
20 PM_0 H
21 PM_5 H
22 GND
23 NO CONNECTION
24 48V_RTN (-48V)
25 48V_RTN (-48V)
26 48V_RTN (-48V)
-----
|
| 4.16 | It's now on .DOC file too! | PHXSS1::POWERS_BR | | Mon Feb 05 1996 18:15 | 13 |
|
I needed to do a presentation on DEChub power consumption, so I
converted Jon's text file to a MS-Word doc (v6.0).
It's at TOOHOT::DHPWR.DOC if anyone would like a copy.
Thanks Jon, for all your efforts in putting the text file together and
keeping them updated.
Regards,
Brian Powers
|
| 4.17 | DH900 Spreadsheet Available | SNOFS1::KHOOJEANNIE | Poles are the best post-impressionists | Mon Oct 21 1996 03:02 | 10
|