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5 ohm speed pot wiring
#200874
04/23/11 10:42 PM
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Joined: Feb 2006
Posts: 78
OP
Member
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I have a 5 ohm speed pot to wire I ran a three wire shielded cable red, black, white, what is the proper color wiring.
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Re: 5 ohm speed pot wiring
[Re: lite bulb]
#200875
04/23/11 11:32 PM
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Joined: Sep 2001
Posts: 806
Member
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Not enough information. What wire goes to what pot terminal depends on how the OTHER end of the cable is connected.
If I was wiring the whole system, I would wire it as follows, just out of habit:
Red---Positive voltage Black ---Negative voltage (or ground) White---Pot wiper (to drive speed input signal)
Typically, the Positive supply voltage goes to the CW terminal of the pot. This way, CW rotation produces a positive output voltage, and increasing speed. But this is subject to the specifics of your installation.
If this is a speed control pot for use with a VFD or something like that, typically it is set up as a variable voltage divider across a DC reference supply, to provide a 0-5V, 0-10V, +/-5V, or +/-10V speed command signal. You should ground the shield only at the drive end, and leave it float at the pot end.
5 ohms is a very low value for a speed control pot. Are you sure you don't mean 5 kilohms (5,000 ohms)?
Last edited by NJwirenut; 04/23/11 11:36 PM.
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Re: 5 ohm speed pot wiring
[Re: lite bulb]
#200994
05/02/11 03:39 AM
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Joined: Oct 2000
Posts: 2,721
Broom Pusher and Member
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Agree with NJwirenut per the Colors -vs- Position on the Pot (Potentiometer). With the Device's Shaft facing towards you: - "RED" - to "Left-Side" of the Resistor (Terminal #1), for the Input Lead (DCV+ / Vss),
- "WHITE" - to the "Center / Wiper Lead" (Terminal #2), for the Loop-Back Lead,
- "BLACK" - to the "Right-Side" of the Resistor (Terminal #3), for the Ground Lead (DCV- / Vcc).
Terminate the Drains & Shields of all Cables at one common point. Isolate the Drain and Shield at the Pot, with Electrical Tape. -- Scott
Scott " 35 " Thompson Just Say NO To Green Eggs And Ham!
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