Search found 5 matches

by tdziubak
Thu Sep 06, 2007 5:30 pm
Forum: General Discussion
Topic: Toshiba 1400XL Plus UPS
Replies: 0
Views: 1286

Toshiba 1400XL Plus UPS

I am troubleshooting a 6KA Toshiba 1400XL Plus UPS (Uninterruptable Power System). Does anyone know where I can get copy of a schematic for the unit?
by tdziubak
Thu Aug 19, 2004 12:56 pm
Forum: General Discussion
Topic: Instruction manual for Foxboro 761 controller
Replies: 2
Views: 1465

Re: Instruction manual for Foxboro 761 controller

The Foxboro 761 micro is a single loop microprocessor based PID controller offered by foxboro starting in about 1985 or so. This controller has regular PID control, the "Exact Autotune" self tuning PID algorithm, programmable linerization, programmable math capability, and takes Thermistor and/or 4-...
by tdziubak
Wed Aug 18, 2004 10:31 am
Forum: General Discussion
Topic: Instruction manual for Foxboro 761 controller
Replies: 2
Views: 1465

Instruction manual for Foxboro 761 controller

Anyone know where I can get a manual for a foxboro 761 controller. It's manual BK2848.
To buy it from foxboro requires a mininum order of $100.00.... Too rich for my blood Any ideas
by tdziubak
Sat Jul 17, 2004 9:42 pm
Forum: General Discussion
Topic: Isolated PWM control of 120 VAC load with 4-20mA signal
Replies: 4
Views: 1536

Re: Isolated PWM control of 120 VAC load with 4-20mA signal

Thanks Guys..... Any particulars on IC's or discrete devices that would make this fast and easy... i.e. something like the Melexis MLX90804 IC driving a Triac or perhaps Fairchild's D94FR4.. I think they are called IGBTs (Insulated Gate Bipolar Transistors). <p>I don't need the high performance of a...
by tdziubak
Sat Jul 17, 2004 8:26 am
Forum: General Discussion
Topic: Isolated PWM control of 120 VAC load with 4-20mA signal
Replies: 4
Views: 1536

Isolated PWM control of 120 VAC load with 4-20mA signal

Can anyone point me in the right direction for a circuit or IC for a low cost 120VAC PWM from a 4-20mA control signal. Need, say 15A supply to resistive or inductive load with ISOLATION from the 4-20mA input control signal. Thanks, your help is greatly appreciated.