Go to Triangle Digital Support Home Page TDS9092 TECHNICAL MANUAL
Hardware expansion
TDS990 power supply
Live website search
Enter key words
 

TDS990 POWER SUPPLY

DESCRIPTION

This product is obsolescent and should not be used for new designs with a long lifetime.

A universal power supply for microprocessor and other applications. It provides three voltage supplies of +12V, +5V and -12V. The +12V supply is adjustable to any other voltage in the range +7.5V to +15.5V. In addition, a 50Hz (or 60Hz) square wave clock derived from the line supply is provided for microprocessor timing software. Use with either 110-120V or 220-240V line power. The power supply is single Eurocard size 160 x 100mm and the connector is a DIN 41612 type C. A 2 Amp fuse is fitted in the positive DC supply rail.

TDS990 Power supply and TDS9099 Backplane

TDS990 Power supply and TDS9099 Backplane

CONNECTIONS

 

Pin numbers

Function

 

a1

c1

+5V 1.7A less current being taken from +8V/+15V permissible). 1.0A max.

a3

c3

+15V 0.6A Voltage adjustable by multiturn

   

+12V 1.2A potentiometer at front of board

   

+10V 1.7A

   

+ 8V 1.8A

a5

c5

LED indicator output. Provides a negative current of about 15mA. Connect a Power On LED from this pin to a32/c32 if required

a7

c7

PCB screen. Connect to ground

a10

c10

First 120V Primary Input (live)

a14

c14

First 120V Primary Input (neutral)

a19

c19

Second 120V Primary Input (live)

a23

c23

Second 120V Primary Input (neutral)

a26

c26

PCB screen. Connect to ground

a28

c28

Ground. Connected on the board to a32/c32

a29

c29

-12V 0.5A (not fused on DC side)

a31

c31

50Hz (or 60 Hz) square wave output, filtered to eliminate  high frequency spikes so that correct timekeeping can be maintained

a32

c32

Power Supply Common. Usually connect to ground.

TDS990 circuit diagram

TDS990 circuit diagram
Click the diagram for more detail, or to save a copy:
1. in Internet Explorer right click on the picture and select "Save Target as..."
2. in Netscape double-click the picture to open the file, then under "File" select the "Save As" option.

Go to Triangle Digital Support Home Page Go to top   Next page