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D1U-H Communications
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D1U-H-2800-52-HB1C Communications Protocol
Application Note
Communication Protocol Support
The D1U-H family of power supplies currently supports 3.3V-bus and 5V-bus
standard-mode (100kHz) I2C Serial Communication as outlined in Philips Semiconductors ‘The I2C Bus Specification Version 2.1’ (January 2000).
The available address lines currently allows for communication with up to 8 D1U-H
power supplies on a single serial communication bus.
Each D1U-H power supply contains a:
The D1U-H family of power supplies can also support 3.3V-bus and 5V-bus SMBUS
Serial Communication as outlined in the SBS Implementers forum ‘System Management Bus (SMBUS) Specification Version 2.0’ (August 2000)
1. 2K serial EEPROM device used for FRU data storage (FRU data specs customer
specific)
D1U-H power supplies are configured to operate as slave-only devices.
2. System-On-Chip (SOC) -type controller used for D1U-H status, fault, and parametric data reporting
Serial Comm. Device Addressing
The D1U-H family of power supplies supports 8-bit addressing (7-bit slave address & LSB read/write bit).
The specified addressing is as follows:
Address Byte
7
1
MSB
6
0
5
0
4
0
3
A2
2
A1
1
A0
0
R/W
LSB
Address lines A0 (LSB), A1, & A2 are internally connected to the standby bus (backplane) voltage through 7.5K pull-up resistors.
The address lines are pin-strapped (grounded or left open) on the backplane connectors to determine the unique 7-bit slave address assigned to each D1U-H slot in the backplane.
Serial Comm. Read/Write Registers
On a host read request, the D1U-H power supplies transmits up to 14 8-bit registers that provide power supply status info, o/p fault indicators, and parametric data.
The 14 data registers are ordered as follows:














Byte 0:
Byte 1:
Byte 2:
Byte 3:
Byte 4:
Byte 4:
Byte 6:
Byte 7:
Byte 8:
Byte 9:
Byte 10:
Byte 11:
Byte 12:
Byte 13:
Status0
Status1
Fault0
Fault1
Vout2
Vout1
Iout2
Iout1
Fan_Sense2
Fan_Sense1
PS_Temp2
PS_Temp1
Amb_Temp2
Amb_Temp1
- Power supply operation status 0
- Power supply operation status 1
- Power supply fault 0
- Power supply fault 1
- Upper (MSB) Byte of 10-bit representation of Main Output Voltage
- Lower (LSB) Byte of 10-bit representation of Main Output Voltage
- Upper (MSB) Byte of 10-bit representation of Main Output Current
- Lower (LSB) Byte of 10-bit representation of Main Output Current
- Upper (MSB) Byte of 10-bit representation of Fan Current
- Lower (LSB) Byte of 10-bit representation of Fan Current
- Upper (MSB) Byte of 10-bit representation of Hot-spot temperature
- Lower (LSB) Byte of 10-bit representation of Hot-spot temperature
- Upper (MSB) Byte of 10-bit representation of PCB temperature
- Lower (LSB) Byte of 10-bit representation of PCB temperature
On a host write request, the D1U-H power supply can receive a single byte command to specify the address offset of subsequent I2C read operation
The 1 command register is as follows:

Byte 0: I2C Read Offset
- Address offset of subsequent I2C read operation, valid range is 0 to 13
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13 Nov 2012 ACAN-30.A03 Page 1 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
Status/Fault Registers
Byte 0 - The D1U-H Status 0 register function and definitions are as follows:
7
PS_ON
MSB
6
Trim Enable
5
ManualFan
BYTE 0 - Status Register
4
3
ShareMode
ORing FET
2
VariableSpeed
1
-
0
LSB
Bit Status Description
Bit #
Set
Main Output Enabled
Main Voltage Trimming Enabled
I2C Manual Fan Speed Enabled
Droop Current Sharing
ORing FET Enabled
Fan Variable Speed Enabled
-
7
6
5
4
3
2
1
0
Clear
Main 0utput Disabled
Main Voltage Trimming Disabled
I2C Manual Fan Speed Disabled
Active Current Sharing
ORing FET Disabled
Fan Variable Speed Disabled
-
Byte 1 - The D1U-H Status 1 register is reserved for future use.
Byte 2 - The D1U-H O/P Fault 0 register function and definitions are as follows:
7
AC Fault
MSB
6
Stby Fault
5
OT Fault
BYTE 1- Output Fault Register
4
3
1 Fan Fault
2 Fans Fault
2
-
1
-
0
LSB
Bit Status Description
Bit #
Set
AC Fault
Standby Fault
Hot-spot Over-Temperature Fault
1 Fan Fault
2 Fans Fault
-
7
6
5
4
3
2
1
0
Clear
No AC Fault
No Standby Fault
No Hot-spot OT Fault
No 1 Fan Fault
No 2 Fans Fault
-
Byte 3 - The D1U-H O/P Fault 1 register function and definitions are as follows:
7
Main OV
MSB
Bit #
7
6
5
4
3
2
1
0
6
Main UV
5
Main OC
BYTE 1- Output Fault Register
4
3
PCB OT
-
2
-
1
-
0
LSB
Bit Status Description
Set
Main Output Over-Voltage Fault
Main Output Under-Voltage Fault
Main Output Over-Current Fault
PCB Over-Temperature Fault
-
Clear
No OV Fault
No UV Fault
No OC Fault
No PCB OT
-
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13 Nov 2012 ACAN-30.A03 Page 2 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
Parametric Data Registers
The D1U-H family currently supports 10-bit monitoring of the main output voltage, main output current, fan sense, hot-spot temperature and PCB temperature.
Byte 4 (High Byte) and 5 (Low Byte) - 10-bit representation of the Main Output Voltage
Model
D1U-H_2800-52-HB1LC
D1U-H_2800-52-HB1C
D1U-H_2800-52-HB2C
D1U-H_2800-52-HB1DC
D1U-H_2800-52-HB2DC
Detection Range
0-67.6VDC
0-67.6VDC
0-67.6VDC
0-67.6VDC
0-67.6VDC
Transfer Equation
0.0661 V/LSB
0.0661 V/LSB
0.0661 V/LSB
0.0661 V/LSB
0.0661 V/LSB
Accuracy
+/- 3% inside O/P regulation limits (00-50°C)
+/- 3% inside O/P regulation limits (00-50°C)
+/- 3% inside O/P regulation limits (00-50°C)
+/- 3% inside O/P regulation limits (00-50°C)
+/- 3% inside O/P regulation limits (00-50°C)
Byte 6 (High Byte) and 7 (Low Byte) - 10-bit representation of the Main Output Current
Model
D1U-H_2800-52-HB1LC
D1U-H_2800-52-HB1C
D1U-H_2800-52-HB2C
D1U-H_2800-52-HB1DC
D1U-H_2800-52-HB2DC
Detection Range
0-81 ADC
0-81 ADC
0-81 ADC
0-81 ADC
0-81 ADC
Transfer Equation
0.0791 A/LSB
0.0791 A/LSB
0.0791 A/LSB
0.0791 A/LSB
0.0791 A/LSB
Accuracy
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
Transfer Equation
-
Repeatability
+/- 5% inside O/P regulation limits (00-50°C)
+/- 5% inside O/P regulation limits (00-50°C)
+/- 5% inside O/P regulation limits (00-50°C)
+/- 5% inside O/P regulation limits (00-50°C)
+/- 5% inside O/P regulation limits (00-50°C)
Byte 8 (High Byte) and 9 (Low Byte) - 10-bit representation of the Fan Sense
Model
D1U-H_2800-52-HB1LC
D1U-H_2800-52-HB1C
D1U-H_2800-52-HB2C
D1U-H_2800-52-HB1DC
D1U-H_2800-52-HB2DC
Detection Range
0-255 LSB
0-255 LSB
0-255 LSB
0-255 LSB
0-255 LSB
Byte 10 (High Byte) and 11 (Low Byte) - 10-bit representation of the hot-spot temperature
Model
D1U-H_2800-52-HB1LC
D1U-H_2800-52-HB1C
D1U-H_2800-52-HB2C
D1U-H_2800-52-HB1DC
D1U-H_2800-52-HB2DC
Detection Range
-40 to 125°C
-40 to 125°C
-40 to 125°C
-40 to 125°C
-40 to 125°C
Transfer Equation
(10-bit reading(dec)-248)/6.2
(10-bit reading(dec)-248)/6.2
(10-bit reading(dec)-248)/6.2
(10-bit reading(dec)-248)/6.2
(10-bit reading(dec)-248)/6.2
Accuracy (Theory)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
Byte 12 (High Byte) and 13 (Low Byte) - 10-bit representation of the PCB temperature
Model
D1U-H_2800-52-HB1LC
D1U-H_2800-52-HB1C
D1U-H_2800-52-HB2C
D1U-H_2800-52-HB1DC
D1U-H_2800-52-HB2DC
Detection Range
-40 to 125°C
-40 to 125°C
-40 to 125°C
-40 to 125°C
-40 to 125°C
Transfer Equation
(10-bit reading(dec)-248)/6.2
(10-bit reading(dec)-248)/6.2
(10-bit reading(dec)-248)/6.2
(10-bit reading(dec)-248)/6.2
(10-bit reading(dec)-248)/6.2
Accuracy (Theory)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
+/- 10% inside O/P regulation limits (00-50°C)
The I2C Read Offset Control Byte
The D1U-H family currently supports a single write command byte to specify the subsequent I2C read address. This enables the host to start reading at any location (valid location is 0
to 13). The read protocols include Current Address Read, Sequential Read, and Random Read.
The I2C Current Address Read method is as follows:
 The internal read address pointer is initialized to point to the address of RAM variable 1 (address of vPS_Status0);
 The address pointer is incremented by one after each byte read operation;
 After the last variable (vAMB_Temp1) has been read, the pointer wraps to the address of the first variable;
 The data transmission sequence should be as follows:
I2C Current Address Read
START
Control Byte
ACK
Data
NACK
STOP
Note: Shaded data is from slave to master
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13 Nov 2012 ACAN-30.A03 Page 3 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
The I2C Sequential Read method is as follows:
 The internal read address pointer is pointing to the address of the first RAM variable to be read;
 The address pointer is incremented by one after each byte read operation;
 After the last variable (vAMB_Temp1) has been read, the pointer wraps to the address of the first variable;
 The data transmission sequence should be as follows:
START
Control Byte
ACK
Data(i)
ACK
...
Data(n)
NACK
...
NACK
STOP
STOP
Note: Shaded data is from slave to master
The I2C Random Read method is as follows:
 The internal read address pointer is set at any time by a write command:
I2C Write Command to Set Read Address Pointer
START
Control Byte
ACK
Offset
ACK
Note: Shaded data is from slave to master

Subsequent data transmission sequence should be as follows:
I2C Random Read
START
Control Byte
ACK
Data(i)
ACK
Note: Shaded data is from slave to master


The address pointer is incremented by one after each byte read operation;
After the last variable (vAMB_Temp1) has been read, the pointer wraps to the address of the first variable;
FRU EEPROM Contents with Byte Descriptions
Address
Byte
HEX Data
[0000]
Byte 0
1
Common Header Format Version
Byte 1
1
Internal Use Area
Byte 2
0
Byte 3
9
Byte 4
0
Byte 5
18
Byte 6
0
Byte 7
DD
Common Header Checksum
Byte 8
1
Internal Use Format Version
Byte 9
0
NULL
ICT Revision
Byte 10
0
NULL
ICT Revision
Byte 11
0
NULL
Test Pass Code
Byte 12
0
NULL
Test Pass Code
Byte 13
0
NULL
Test Pass Code
Byte 14
0
NULL
Test Location
Byte 15
0
NULL
Number of Tests Performed
Byte 16
0
NULL
Number Of Failures Detected
Byte 17
0
NULL
Number of NTF Detected
Byte 18
0
NULL
Functional Revision
Byte 19
0
NULL
Functional Revision
Byte 20
0
NULL
Functional Test Pass Code
Byte 21
0
NULL
Functional Test Pass Code
Byte 22
0
NULL
Functional Test Pass Code
Byte 23
0
NULL
Functional Test Location
[0010]
ASCII
NULL
Description
Chassis Info Area Starting
Board Area Starting Offset
NULL
Byte 73
Product Info Area Starting Offset
Multi-Record Area Offset
NULL
Notes
Byte 192
Pad with zero
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13 Nov 2012 ACAN-30.A03 Page 4 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
Address
[0020]
[0030]
Byte
HEX Data
ASCII
Description
Byte 24
0
NULL
Number of Tests Performed
Byte 25
0
NULL
Number Of Failures Detected
Byte 26
0
NULL
Number of NTF Detected
Byte 27
0
NULL
LCD Revision
Byte 28
0
NULL
LCD Revision
Byte 29
0
NULL
LCD Test Pass Code
Byte 30
0
NULL
LCD Test Pass Code
Byte 31
0
NULL
LCD Test Pass Code
Byte 32
0
NULL
Functional Test Location
Byte 33
0
NULL
Number of Tests Performed
Byte 34
0
NULL
Number Of Failures Detected
Byte 35
0
NULL
Number of NTF Detected
Byte 36
0
NULL
CTO Revision
Byte 37
0
NULL
CTO Revision
Byte 38
0
NULL
Functional CTO
Byte 39
0
NULL
Functional CTO
Byte 40
0
NULL
Functional CTO
Byte 41
0
NULL
CTO. Test Location
Byte 42
0
NULL
Number of CTO Tests Performed
Byte 43
0
NULL
Number Of CTO Failures Detected
Byte 44
0
NULL
Number of CTO NTF Detected
Byte 45
0
NULL
Audit Test Revision
Byte 46
0
NULL
Audit Test Revision
Byte 47
0
NULL
Audit Test Pass Code
Byte 48
0
NULL
Audit Test Pass Code
Byte 49
0
NULL
Audit Test Pass Code
Byte 50
0
NULL
Audit. Test Location
Byte 51
0
NULL
Number of Audit Tests Performed
Byte 52
0
NULL
Number Of Audit Failures Detected
Byte 53
0
NULL
Number of Audit NTF Detected
Byte 54
0
NULL
Field Repair Revision
Byte 55
0
NULL
Field Repair Revision
Byte 56
0
NULL
Field Repair Test Pass Code
Byte 57
0
NULL
Field Repair Test Pass Code
Byte 58
0
NULL
Field Repair Test Pass Code
Byte 59
0
NULL
Field Repair Test Location
Byte 60
0
NULL
Number of Field Repair Tests Performed
Byte 61
0
NULL
Number Of Field Repair Failures Detected
Byte 62
0
NULL
Number of Field Repair NTF Detected
Notes
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13 Nov 2012 ACAN-30.A03 Page 5 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
Address
[0040]
[0050]
[0060]
Byte
HEX Data
ASCII
Description
Byte 63
0
NULL
Reserved for future Use
Byte 64
0
NULL
Reserved for future Use
Byte 65
0
NULL
Reserved for future Use
Byte 66
0
NULL
Reserved for future Use
Byte 67
0
NULL
Reserved for future Use
Byte 68
0
NULL
Reserved for future Use
Byte 69
0
NULL
Reserved for future Use
Byte 70
0
NULL
Reserved for future Use
Byte 71
0
NULL
Reserved for future Use
Byte 72
1
Board Area Format Version
Byte 73
0F
Board Area Length
Byte 74
0
Byte 75
20
Manufacturing Date And Time (Hex)
Byte 76
20
Manufacturing Date And Time (Hex)
Byte 77
20
Manufacturing Date And Time (Hex)
Byte 78
CA
Board Manufacturer Name type/length
Byte 79
43
M
Board Manufacturer Name
Byte 80
26
P
Board Manufacturer Name
Byte 81
44
S
Byte 82
20
Board Manufacturer Name
Byte 83
20
Board Manufacturer Name
Byte 84
20
Board Manufacturer Name
Byte 85
20
Board Manufacturer Name
Byte 86
20
Board Manufacturer Name
Byte 87
20
Board Manufacturer Name
Byte 88
20
Board Manufacturer Name
Byte 89
E0
Board Product Name type/length
Byte 90
42
B
Board Product Name
Byte 91
55
U
Board Product Name
Byte 92
4C
L
Board Product Name
Byte 93
4B
K
Board Product Name
Byte 94
20
Byte 95
50
P
Board Product Name
Byte 96
4F
O
Board Product Name
Byte 97
57
W
Board Product Name
Byte 98
45
E
Board Product Name
Byte 99
52
R
Board Product Name
Byte 100
20
Byte 101
53
NULL
Notes
Start of Check-sum
Language Code
10 Bytes long
Board Manufacturer Name
32 Bytes long
Board Product Name
Board Product Name
S
Board Product Name
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13 Nov 2012 ACAN-30.A03 Page 6 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
Address
[0070]
[0080]
Byte
HEX Data
ASCII
Byte 102
55
U
Board Product Name
Byte 103
50
P
Board Product Name
Byte 104
50
P
Board Product Name
Byte 105
4C
L
Board Product Name
Byte 106
59
Y
Board Product Name
Byte 107
20
Board Product Name
Byte 108
20
Board Product Name
Byte 109
20
Board Product Name
Byte 110
20
Board Product Name
Byte 111
20
Board Product Name
Byte 112
20
Board Product Name
Byte 113
20
Board Product Name
Byte 114
20
Board Product Name
Byte 115
20
Board Product Name
Byte 116
20
Board Product Name
Byte 117
20
Board Product Name
Byte 118
20
Board Product Name
Byte 119
20
Board Product Name
Byte 120
20
Board Product Name
Byte 121
20
Board Product Name
Byte 122
D0
Board Serial Number type/length
Byte 123
35
5
Board Serial Number (HEX)
Byte 124
32
2
Board Serial Number (HEX)
Byte 125
43
C
Board Serial Number (HEX)
Byte 126
54
T
Board Serial Number (HEX)
Byte 127
48
H
Board Serial Number (HEX)
Byte 128
30
0
Board Serial Number (HEX)
Byte 129
30
0
Board Serial Number (HEX)
Byte 130
30
0
Board Serial Number (HEX)
Byte 131
30
0
Board Serial Number (HEX)
Byte 132
20
Board Serial Number (HEX)
Byte 133
20
Board Serial Number (HEX)
Byte 134
20
Board Serial Number (HEX)
Byte 135
20
Board Serial Number (HEX)
Byte 136
20
Board Serial Number (HEX)
Byte 137
20
Board Serial Number (HEX)
Byte 138
20
Board Serial Number (HEX)
Byte 139
CB
Board Part Number type/length
Byte 140
30
0
Description
Notes
16 Bytes long
Input from serial
number bar code
11 Bytes long
Board Part Number (HEX-ASCII)
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13 Nov 2012 ACAN-30.A03 Page 7 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
Address
[0090]
[00A0]
[00B0]
Byte
HEX Data
ASCII
Description
Byte 141
39
9
Board Part Number (HEX-ASCII)
Byte 142
35
5
Board Part Number (HEX-ASCII)
Byte 143
37
7
Board Part Number (HEX-ASCII)
Byte 144
2D
-
Board Part Number (HEX-ASCII)
Byte 145
32
2
Board Part Number (HEX-ASCII)
Byte 146
31
1
Board Part Number (HEX-ASCII)
Byte 147
34
4
Board Part Number (HEX-ASCII)
Byte 148
30
0
Board Part Number (HEX-ASCII)
Byte 149
20
Board Part Number (HEX-ASCII)
Byte 150
20
Board Part Number (HEX-ASCII)
Byte 151
41
FRU File ID type/length
Byte 152
10
FRU File ID
Byte 153
C8
Board Revision type/length
Byte 154
58
X
Board Revision (HEX-ASCII)
Byte 155
31
1
Board Revision (HEX-ASCII)
Byte 156
20
Board Revision (HEX-ASCII)
Byte 157
20
Board Revision (HEX-ASCII)
Byte 158
20
Board Revision (HEX-ASCII)
Byte 159
20
Board Revision (HEX-ASCII)
Byte 160
20
Board Revision (HEX-ASCII)
Byte 161
20
Board Revision (HEX-ASCII)
Byte 162
C4
Engineering Date Code type/length
Byte 163
34
4
Engineering Date Code (HEX-ASCII)
Byte 164
33
3
Engineering Date Code (HEX-ASCII)
Byte 165
32
2
Engineering Date Code (HEX-ASCII)
Byte 166
34
4
Engineering Date Code
(HEX-ASCII)
Byte 167
C2
Board Artwork Revision type/length
2 Bytes long
Byte 168
41
A
Board Artwork Revision (HEX-ASCII)
Byte 169
31
1
Board Artwork Revision (HEX-ASCII)
Byte 170
10
Byte 171
0
NULL
FRU-Specific Information
Byte 172
0
NULL
FRU-Specific Information
Byte 173
0
NULL
FRU-Specific Information
Byte 174
0
NULL
FRU-Specific Information
FRU-Specific Info type/length
Byte 175
0
NULL
FRU-Specific Information
Byte 176
0
NULL
FRU-Specific Information
Byte 177
0
NULL
FRU-Specific Information
Byte 178
0
NULL
FRU-Specific Information
Notes
8 Bytes long
Input from EDC bar
code
InputfromEDCbarcode
16 Bytes long
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13 Nov 2012 ACAN-30.A03 Page 8 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
Address
[00D0]
Byte
HEX Data
ASCII
Description
Notes
Byte 179
0
NULL
FRU-Specific Information
Byte 180
0
NULL
FRU-Specific Information
Byte 181
0
NULL
FRU-Specific Information
Byte 182
0
NULL
FRU-Specific Information
Byte 183
0
NULL
FRU-Specific Information
Byte 184
0
NULL
FRU-Specific Information
Byte 185
0
NULL
FRU-Specific Information
Byte 186
0
NULL
FRU-Specific Information
Byte 187
C1
Byte 188
0
NULL
Pad With Zeros
Byte 189
0
NULL
Pad With Zeros
Byte 190
0
NULL
Pad With Zeros
Byte 191
0F
Byte 192
0
Byte 193
2
End of list/version
Byte 194
18
Record length
Byte 195
B1
Record Checksum
Byte 196
35
Header Checksum
Byte 197
40
Overall capacity
(watts) (LSB)
Byte 198
6
Overall capacity
(watts) (MSB)
Byte 199
FF
Peak VA LSB
Byte 200
FF
Peak VA
Byte 201
FF
Inrush current
C1h indicates no more fields
Board Info Checksum
NULL
Start of Check-sum
for multi-record
Power Supply Information Record
Byte 202
0
Inrush interval in ms.
Byte 203
28
Low end Input voltage range 1 (10mv) LSB
Byte 204
23
Low end Input voltage range 1 (10mv) MSB
Byte 205
B0
High end Input voltage range 1 (10mv) LSB
Byte 206
36
High end Input voltage range 1 (10mv) MSB
Byte 207
50
Low end Input voltage range 2 (10mv) LSB
Byte 208
46
Low end Input voltage range 2 (10mv) MSB
Byte 209
20
High end Input voltage range 2 (10mv) LSB
Byte 210
67
High end Input voltage range 2 (10mv) MSB
Byte 211
2F
Low end Input frequency range
Byte 212
3F
High end Input frequency range
Byte 213
14
AC Dropout Tolerance (ms)
Byte 214
7
Binary Flags
Byte 215
0
Peak Wattage
www.murata-ps.com/support
13 Nov 2012 ACAN-30.A03 Page 9 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
Address
[00E0]
[00F0]
Byte
HEX Data
ASCII
Description
Notes
Byte 216
0
Peak Wattage LSB
Byte 217
3
Combined Voltage Wattage ID
Byte 218
40
Combined Wattage LSB
Byte 219
6
Combined Wattage MSB
Byte 220
0
Predictive fail tachometer lower threshold
Byte 221
FF
Byte 222
FF
Byte 223
FF
Byte 224
FF
Byte 225
FF
Byte 226
FF
Byte 227
FF
Byte 228
FF
Byte 229
FF
Byte 230
FF
Byte 231
FF
Byte 232
FF
Byte 233
FF
Byte 234
FF
Byte 235
FF
Byte 236
FF
Byte 237
FF
Byte 238
FF
Byte 239
FF
Byte 240
FF
Byte 241
FF
Byte 242
FF
Byte 243
FF
Byte 244
FF
Byte 245
FF
Byte 246
FF
Byte 247
FF
Byte 248
FF
Byte 249
FF
Byte 250
FF
Byte 251
FF
Byte 252
FF
www.murata-ps.com/support
13 Nov 2012 ACAN-30.A03 Page 10 of 11
D1U-H Communications
D1U-H-2800-52-HB1C Communications Protocol
Application Note
Address
Byte
HEX Data
Byte 253
FF
Byte 254
FF
Byte 255
FF
ASCII
Description
Notes
[0100]
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2012 Murata Power Solutions, Inc.
www.murata-ps.com/support
13 Nov 2012 ACAN-30.A03 Page 11 of 11