For this part, is it correct ground the insulated case and use +12 to engage the relay. ( connected to the control terminal)?
Per the manufacturer, the answer is no. The terminal going to the coil is the negative side and should go to the master switch, and the positive side of the coil is common to the power terminal.
What is the peak amperage rating, and the constant amperage rating?
Regarding part number 11-03161, the maximum inrush rating is 150 amps and the continuous duty rating is 80 amps.
Does the coil of the relay have a diode to prevent any excess voltage spikes (as recommended by Dynon)?
Per the manufacturer, no it does not. Regarding part numbers 11-03161 / 11-05799.
Is there a drawing available for these master relays? Specifically one that shows the terminals. Thanks.
We have added the drawing to the "Documents" tab of this web page. Please review it there.
What is the current draw of the coil in amps?
The 70-111226-5B1 is a 12V continuous duty solenoid, so therefore the coil is rated at approximately 9 watts. Since P= IV. Or, 9=I (12). So for a 12 volt system, the current is 0.75 amps
Can this relay be used in series with the starter circuit with a series Starter relay?
No, because the starter circuit requires high amperage we do not recommend using this relay.
Does this relay can replace Cessna part 0850469-1?
No, these master relays are intended for use on experimental aircraft only.