Philips System 21 Interface Unit PM2132 Digital Output, Not Tested

Spectracom 1204-1080 Output Option Card 1204-01C0 for SecureSync Systems

Philips PM 2140 System 21

Spectracom 1204-1100 SecureSync HaveQuick TTL Output Option Card 4 Outputs

Elenco Digital/Analog Trainer Model No. XK550 With Case OUTPUT VOLTAGE TESTED

Jumo eTRON T100 DIN Rail On/Off Temperature Controller, 1 Input, 1 Output Relay

AC/DC 90~265V Digital Counter Length Meter +2 Relay Output & Pulse NPN NPN O6W7

Philips PM 3365A 100MHz 100MS/s Digital Oscilloscope – Used, Untested