4

HCA600ACREF Connector Pin Designations

PIN

DESIGNATION

FUNCTION

WIRE COLOR

SPECIFICATIONS AND COMMENTS

1

Analog Ground

Input Ground

Black

(22 Gauge)

Connect to ground of pre-amp or connect to pin 18.

2

Non-Inv Input

Audio Input

Phono

Audio applied to pin 2 does not invert the phase of the signal.

Input impedance is 5k

Ω.

3

Inv Input

Audio Input

Phono

Pin 3 and 4 are differential inputs. Audio applied to pin 3 inverts

the phase of the signal. Input impedance is 10k

Ω.

4

Analog Ground

Input Ground

Black

(22 Gauge)

5

Enable

Enable

Green

(22 Gauge)

Add capacitance to delay startup or pull low to disable amp.

6

Fan

Controls fan or drives LED

indicating over temperature

shutdown

Brown

(22 Gauge)

Optional

7

CL_OUT

Drives LED to indicate

onset of current limit

Grey

(22 Gauge)

Optional

8

SFCL_OUT

Drives LED to indicate soft

clipping is activated

Blue

(22 Gauge)

Optional

9

-12V

- Bias Supply

Purple

(22 Gauge)

50mA, -12V

±10%

10

+12V

+ Bias Supply

Orange

(22 Gauge)

50mA, +12V

±10%

11

PGND

Power Ground

Black

(16 Gauge)

Connect to Star Ground

12

+BUS

Positive Supply

Red

(16 Gauge)

For best results use at least 12,000

µF, 160V electrolytic

capacitor. Limit Bus under no load conditions to 130V.

13

+BUS

Positive Supply

Red

(16 Gauge)

14

PGND

Power Ground

Black

(16 Gauge)

15

-BUS

Negative Supply

White

(16 Gauge)

For best results use at least 12,000

µF, 160V electrolytic

capacitor. Limit Bus under no load conditions to 130V.

16

-BUS

Negative Supply

White

(16 Gauge)

17

+12VFLT

Floating 12V supply

(referenced to -Bus)

Yellow

(20 Gauge)

500mA, +12V

±10%

This signal is referenced to the negative rail (-Bus).

18

PGND

Power Ground

Black

(16 Gauge)

Molex Part Numbers: Header - 26-60-5180, Connector - 09-50-8183, Pins - 08-52-0113

WARNING: Insulate wires. Accidental shorts between +/- Bus and bias supplies will damage the amplifier.

HCA600ACREF