Tapco T-231 user service Appendix B Connections, XLR Connectors, 1/4 TS Phone Plugs and Jacks

Appendix B: Connections

XLR Connectors

The inputs and outputs use 3-pin male and female XLR connectors. They are wired as follows, according to standards specified by the AES (Audio Engineering Society).

SHIELD 2

HOT

COLD 3 1

1SHIELD

3COLD

1/4" TS Phone Plugs and Jacks

“TS” stands for Tip-Sleeve, the two connection points available on a mono 1/4" phone jack or plug. They are used for unbalanced signals.

SLEEVE SLEEVE TIP

TIP

TIP

SLEEVE

1/4" TS Unbalanced Wiring:

Sleeve = Shield

Tip = Hot (+)

2

XLR Balanced Wiring

Pin 1 = Shield

Pin 2 = Hot (+)

Pin 3 = Cold (–)

HOT

1/4" TRS Insert Plugs and Jacks

When patching the T•231 into a channel’s insert jack, you may need to use a special 1/4" TRS connector that uses the tip to send the signal to the

1/4" TRS Phone Plugs and Jacks

“TRS” stands for Tip-Ring-Sleeve, the three

connection points available on a stereo 1/4" or balanced phone jack or plug. TRS jacks and plugs are used for balanced signals.

T•231, and the ring to return the signal to the channel. The sleeve is the common ground (earth) for both signals. These are both unbalanced signals.

	ring	SEND to processor
		“tip”
tip	sleeve	(TRS plug)

RING SLEEVE	SLEEVE RING TIP
	This plug connects to the	“ring”
	Channel Insert jack
TIP		RETURN from processor

RING

TIP

SLEEVE

1/4" TRS Balanced Wiring:

Sleeve = Shield

Tip = Hot (+)

Ring = Cold (–)

1/4" TRS Insert Wiring:

Sleeve = Ground

Tip = Send

Ring = Return

RCA Plugs and Jacks

RCA-type plugs (also known as phono plugs) and jacks are often used in home stereo and video equipment and in many other applications. They are unbalanced and electrically equivalent to a 1/4" TS phone plug.

SLEEVE TIP SLEEVE TIP

RCA Unbalanced Wiring:

Sleeve = Shield

Tip = Hot

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