TM500 Series plug-in interface

Tektronix TM500 mainframes provide power supplies and signal connections for TM500 plug-ins.

There are two dedicated, floating 25 V_AC transformer windings per slot, as well as several AC and DC buses shared by all slots.
For each slot, two uncommitted transistors (one NPN and one PNP) are mounted in the mainframe. These are available for the module's power regulation circuits.

The signal pin connections depend on the individual modules. For details, please see the TM 500 Rear Interface Data Book.

	B side	A side
Pin	Function	Function
28..14	Signals	Signals
13	25 VAC winding #1	25 VAC winding #1
12	+33.5 V filtered DC	+33.5 V filtered DC
11	Collector lead of PNP series pass	Base lead of PNP series pass
10	Transformer shield lead	Emitter lead of PNP series pass
9	±33.5 V common return	±33.5 V common return
8	−33.5 V filtered DC	−33.5 V filtered DC
7	Collector lead of NPN series pass	Emitter lead of NPN series pass
6	No connection	Base lead of NPN series pass
5	17.5 VAC winding	17.5 VAC winding
4	+11.5 V common return	+11.5 V common return
3	+11.5 V common return	+11.5 V common return
2	+11.5 V filtered DC	+11.5 V filtered DC
1	25 VAC winding #2	25 VAC winding #2

Interface connections viewed from rear of power module. Pins 14 through 28 are used for signal connections.

Pin group function legend

DC power and ground

AC power

Signals

Uncommitted transistors

Connector keys

• between pins 6 and 7 - TM500 standard
• between pins 19 and 20 - power supply family modules
• between pins 21 and 22 - measurement family modules
• between pins 23 and 24 - signal source family modules
• between pins 25 and 26 - SC502 family
• ...

See also

• TM5000 Series plug-in interface
• Tektronix TM 500 Series Rear Interface Data Book (PDF)
• Tektronix TM 500 Series Rear Interface Data Book (OCR, PDF)