cui.com

date 07/22/2015

│ page 8 of 19

CUI Inc

│ SERIES: PSE-3000 │ DESCRIPTION: AC-DC HOT-SWAP POWER SUPPLY

APPLICATION NOTES (CONTINUED)

PMBus™ COMMAND SUBSET

The following is subset of commands (extracted from the “PMBus™ Power System Management Protocol Specification; Part

II Command Language; Rev 1.2, 6 September 2010”) and apply on a per module basis, (although certain commands could

Opcode

(HEX)

Command

Name

No. of

Bytes

Type

Read /

Write

Command Description

01

OPERATION

1

Byte

W

The OPERATION command is used to turn the unit on & off in

conjunction with the CONTROL (short; last make, first make pin).

03

CLEAR_FAULTS

0

N/A

W

Clear fault data latched at STATUS_WORD

19

CAPABILITY

1

Byte

R

Follows PMBus™ spec.

78

STATUS_BYTE

1

Byte

R

Lower byte returned from the STATUS_WORD

79

STATUS_WORD

2

Word

R

The command returns two bytes of data relating to the unit

fault condition.

88

READ_VIN

2

Word

R

Provides the measured input voltage of the power module.

(Divide decimal value by 100)

89

READ_IIN

2

Word

R

Provides the measured input current of the power module.

(Divide decimal value by 100)

8B

READ_VOUT

2

Word

R

Provides the measured output voltage of the power module.

(Divide decimal value by 100)

8C

READ_IOUT

2

Word

R

Provides the measured output current of the power module.

(Divide decimal value by 100)

8D

READ_TEMPERATURE_1

2

Word

R

This command shall return the prevailing internal ambient of the

power module, in degrees Celsius.

8E

READ_TEMPERATURE_2

2

Word

R

This command shall return a select component temperature used

by the power module, in degrees Celsius.

8F

READ_TEMPERATURE_3

2

Word

R

This command shall return a select component temperature used

by the power module, in degrees Celsius.

90

READ_FAN_SPEED_1

2

Word

R

Provides the measured fan speed (RPM) in the power module.

91

READ_FAN_SPEED_2

2

Word

R

Provides the measured fan speed (RPM) in the power module.

96

READ_POUT

2

Word

R

This command shall return the calculated output being delivered

by the power module, in Watts. (Divide value by 10)

97

READ_PIN

2

Word

R

This command shall return the calculated input being drawn by

the power module, in Watts. (Divide value by 10)

98

1

Byte

R

PMBus™ Revision

99

MFR_ID

8

Block

R

The command returns the ASCII string for manufacturer’s ID.

9A

MFR_MODEL

12

Block

R

The command returns the ASCII string manufacturer’s model.

9B

MFR_REVISION

2

Block

R

The command returns the ASCII string manufacturer’s revision

(example case “A0”).

9C

MFR_LOCATION

8

Block

R

The command returns the ASCII string manufacturer’s revision

(example case “TORONTO”).

9D

MFR_DATE

4

Block

R

The command returns the ASCII string manufacturer’s date code

(example case “0913”).

9E

MFR_SERIAL

8

Block

R

The command returns manufacturers serial number.

For more information, please visit the product page.