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TM500 Series plug-in interface (view source)

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[[File:tm500pinout.png]]
'''Tektronix [[TM500 and TM5000 mainframes|TM500 mainframes]]''' provide power supplies and signal connections for [[TM500 and TM5000 plug-ins|TM500 plug-ins]].


==Used in==
Mechanically, the interface is a direct card-edge connector with 28 contacts on either side, at 5/32" (~0.156" or 3.96 mm) spacing.  The connector can be keyed in several places, the plug-in boards have matching cuts between contacts (see below).
* [[TM500 system]]
* [[TM500 and TM5000 plug-ins|TM500 plug-ins]]
Looking into the mainframe from the front panel, "A" pins are left of the connector centerline (on the plug-in PCB's component side) and "B" are on the right (on the plug-in PCB's solder side). Pins are numbered from 1 at the bottom to 28 on the top.


==Pictures==
The mainframe provides supplies shared by all slots: 17.5 V<sub>AC</sub>, +11.5 V (regulated from the 17.5 V<sub>AC</sub> supply), +33.5 V, and −33.5 V. 
In addition, there are two dedicated, 25 V<sub>AC</sub>, 0.5 A transformer windings per slot, floating up to 350 V<sub>peak</sub> with reference to the common ground.
 
In mainframes that have a "[[TM500 high-power compartments|high-power compartment]]", that slot has a separate 17.5 V<sub>AC</sub> and 11.5 V<sub>DC</sub> section (floating v-v the other supplies) providing 4 A shared between them, and that slot's 25 V windings are rated 1 A each.
 
For each slot, two uncommitted transistors (one NPN and one PNP) are heatsink-mounted in the mainframe. These are available for the module's power regulation circuits and are rated to dissipate 7.5 W each.
 
The signal pin connections depend on the individual modules.  For details, please see the [[Media:070-2088-00.pdf|TM 500 Rear Interface Data Book]].
 
{| class="wikitable"
|-
!width="10%"|&nbsp;
!width="45%"| A side
!width="45%"| B side
|-
! Pin
! Function
! Function
|- bgcolor="Yellow"
| 28..14 || Signals || Signals
|- bgcolor="LightBlue"
! 13
| 25 V<sub>AC</sub> winding #1 || 25 V<sub>AC</sub> winding #1
|- bgcolor="Pink"
! 12
| +33.5 V filtered DC || +33.5 V filtered DC
|- bgcolor="LightGreen"
! 11
| Base lead of PNP series pass || Collector lead of PNP series pass
|-
! 10
| bgcolor="LightGreen" | Emitter lead of PNP series pass || Transformer shield lead
|- bgcolor="Pink"
! 9
| ±33.5 V common return || ±33.5 V common return
|- bgcolor="Pink"
! 8
| −33.5 V filtered DC || −33.5 V filtered DC
|- bgcolor="LightGreen"
! 7
| Emitter lead of NPN series pass || Collector lead of NPN series pass
|- bgcolor="Black"
|  || ||
|-
! 6
| bgcolor="LightGreen" | Base lead of NPN series pass || No connection
|- bgcolor="LightBlue"
! 5
| 17.5 V<sub>AC</sub> winding || 17.5 V<sub>AC</sub> winding
|- bgcolor="Pink"
! 4
| +11.5 V common return || +11.5 V common return
|- bgcolor="Pink"
! 3
| +11.5 V common return || +11.5 V common return
|- bgcolor="Pink"
! 2
| +11.5 V filtered DC || +11.5 V filtered DC
|- bgcolor="LightBlue"
! 1
| 25 V<sub>AC</sub> winding #2 || 25 V<sub>AC</sub> winding #2
|-
|}
 
Interface connections viewed from front of power module. Pins 14 through 28 are used for signal connections.
 
25 V<sub>AC</sub> winding connections 1A, 13A are in phase, i.e. for 50 V<sub>ct</sub> connect 1B-13A as for example in the [[PS502]].
 
===Pin group function legend===
:{|
|-
| bgcolor="Pink"        |  DC power and ground
|-
| bgcolor="LightBlue"  |  AC power 
|-
| bgcolor="Yellow"      |  Signals  
|-
| bgcolor="LightGreen"  |  Uncommitted transistors
|}
 
==Connector keys==
 
The standard TM500 frames simply have a key between pins 6 and 7 as shown in Figure 3-1 from the [[Media:070-2088-00.pdf|TM 500 Rear Interface Data Book]]:
<gallery>
<gallery>
070-2088-01 TM500 Rear Interface Data Book Figure 3-1.png
</gallery>
</gallery>
Other keys are added for options, depending on the specific connectivity requirements for families of plugins.
The [[TM500 Series Rear Interface Data Book]] details the various positions for the optional barrier keys and are summarized here for reference.
{| class="wikitable"
|+ Barrier Key Positions
|-
!width="5%"| Pins
!width="15%"| Purpose
!width="80%"| Example plugins
|-
! 25-26
| [[SC502]] Family
|
|-
! 24-25
| Logic Analyzer Family
|
|-
! 23-24
| Signal Source Family
| [[AF501]], [[AM501]], [[AM502]], [[FG501]], [[FG502]], [[FG503]], [[PG501]], [[PG502]], [[PG505]], [[PG506]], [[PG508]], [[RG501]], [[TG501]], [[SC501]], [[SG502]], [[SG503]], ...
|-
! 22-23
| [[TR502]]
|
|-
! 21-22
| Measurement Family
| [[DC501]], [[DC502]], [[DC503]], [[DC504]], [[DC505]], [[MR501]], ...
|-
! 19-20
| Power Supply Family
| [[PS501]], [[PS503]], [[PS505]], ...
|-
! 17-18
| DMM Family
|
|-
! 6-7
| TM500 standard
|
|-
|}
==Power ratings==
{| class="wikitable"
|-
! Mainframe
!colspan=3 | Standard slots
!colspan=3 | [[TM500 high-power compartments|High-power slot]]
|-
| rowspan=3 | [[TM501]] 
| +11.5 V  || 17 V<sub>AC</sub> || | 2×25 V<sub>AC</sub> ||  ||  || 
|-
|colspan=2 align=center| 1.0 A shared || 2×0.5 A 
|colspan=3 align=center| 
|-
|colspan=3 align=center| ±33.5 V 0.5 A shared
|colspan=3 align=center| 
|-
| rowspan=3 | [[TM502]] 
| +11.5 V  || 17 V<sub>AC</sub> || | 2×25 V<sub>AC</sub> ||  ||  || 
|-
|colspan=2 align=center| 60 VA shared || 2×0.5 A 
|colspan=3 align=center| 
|-
|colspan=3 align=center| ±33.5 V 0.7 A shared
|colspan=3 align=center| 
|-
| rowspan=3 | [[TM503]] 
| +11.5 V  || 17 V<sub>AC</sub> || | 2×25 V<sub>AC</sub> ||  ||  || 
|-
|colspan=2 align=center| 3.9 A or 90 VA shared || 2×0.5 A 
|colspan=3 align=center| 
|-
|colspan=3 align=center| ±33.5 V 0.7 A shared
|colspan=3 align=center| 
|-
| rowspan=3 | [[TM504]] 
| +11.5 V  || 17 V<sub>AC</sub> || | 2×25 V<sub>AC</sub> || +11.5 V  || 17 V<sub>AC</sub> || | 2×25 V<sub>AC</sub>
|-
|colspan=2 align=center| 3.6 A shared  || 2×0.5 A
|colspan=2 align=center| 3.6 A shared  || 2×1 A
|-
|colspan=6 align=center| ±33.5 V 1.4 A shared
|-
| rowspan=3 | [[TM506]] 
| +11.5 V  || 17 V<sub>AC</sub> || | 2×25 V<sub>AC</sub> || +11.5 V  || 17 V<sub>AC</sub> || | 2×25 V<sub>AC</sub>
|-
|colspan=2 align=center| 5.2 A shared  || 2×0.5 A
|colspan=2 align=center| 4 A shared    || 2×1.2 A
|-
|colspan=6 align=center| ±33.5 V 1.75 A shared
|-
| rowspan=3 | [[TM515]] 
| +11.5 V  || 17 V<sub>AC</sub> || | 2×25 V<sub>AC</sub> ||  ||  || 
|-
|colspan=2 align=center| 6.5 A or 150 VA shared || 2×0.5 A 
|colspan=3 align=center| 
|-
|colspan=3 align=center| ±33.5 V 1.75 A shared
|colspan=3 align=center| 
|-
|}


==See also==
==See also==
* [[TM5000 Series plug-in interface]]
* [[TM5000 Series plug-in interface]]
* [[TM500 Series Rear Interface Data Book]]
* [[Media:TM500_Supplies_sm.pdf|Suggested Power Supply Circuits for the TM500 Blank Plug-in Kit]]


[[Category:Plug-in interfaces]]
[[Category:Plug-in interfaces]]
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