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222 Hardware Reference Manual
Intel
®
IXP2800 Network Processor
SRAM Interface
The external coprocessor interface is based on FIFO communication.
A thread can send parameters to the coprocessor by doing a normal SRAM write instruction:
sram[write, $sram_xfer_reg, src1, src2, ref_count], optional_token
The number of parameters (longwords) passed is specified by ref_count. The address can be
used to support multiple coprocessor FIFO ports. The coprocessor performs some operation using
the parameters, and then will later pass back some number of results values (the number of
parameters and results will be known by the coprocessor designers). The time between the input
parameter and return values is not fixed; it is determined by the amount of time the coprocessor
requires to do its processing and can be variable. When the coprocessor is ready to return the
results, it signals back to the SRAM controller through a mailbox-valid bit that the data in the read
FIFO is valid. A thread can get the return values by doing a normal SRAM read instruction:
sram[read, $sram_xfer_reg, src1, src2, ref_count], optional_token
Figure 83 shows the coprocessor with 1-to-n memory-mapped FIFO ports.
If the read instruction executes before the return values are ready, the coprocessor signals
data-invalid through the mailbox register on the read data bus (
Qn[17:0]). Signaling a thread
upon pushing its read data works exactly as in a normal SRAM read.
Figure 83. Coprocessor with Memory Mapped FIFO Ports
A9749-01
Read
Control
Logic
Port 1
Mail Box
FIFO
Valid
Write
Control
Logic
Port 2
Mail Box
Valid
Port n
Mail Box
Valid
Network Processor
Coprocessor
Qn[17:0]
RPE_Ln[0]
BWEn[1:0]
WPE_Ln[0]
Dn[17:0]
An[x:0]
Port 1
Mail Box
FIFO
Port 2
Mail Box
FIFO
Port n
Mail Box
FIFO
FIFO
FIFO
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Liebert Precision Cooling System DS podręczniki

Instrukcje obsługi i podręczniki użytkownika dla Sprzęt komputerowy Liebert Precision Cooling System DS.
Dostarczamy 1 pdf podręczników Liebert Precision Cooling System DS do pobrania za darmo według typów dokumentów: Instrukcja Użytkownika


Spis treści

User Manual

1

2

TABLE OF CONTENTS

3

SAVE THESE INSTRUCTIONS

11

2.0 COOLING CONFIGURATIONS

16

3.1 Room Preparation

17

Pre-Installation Guidelines

18

3.5 Operating Conditions

19

35"

22

33"

22

Dry Weight - lb. (kg)

23

Approximate

23

DPN000924

24

TOP VIEW

26

FRONT VIEW

26

DPN001013

28

24"

33

Supply air

37

26"

39

Top of Unit

40

DPN001196

43

SAFETY INFORMATION

45

Spreader Bars and Slings

46

Piano Jacks

46

Forklift

46

5.2.3 Removing Piano Jacks

48

DETAIL A

51

6.1 Required Equipment

52

6.3 Reassembly—Downflow Units

55

6.4 Reassembly Checklist

56

60-3/16"

57

(1529mm)

57

59-7/16"

60

(1509mm)

60

37"

61

6.5 Disassembly—Upflow Units

66

6.6 Reassembly—Upflow Unit

68

6.7 Reassembly Checklist

68

31-1/4"

69

45-13/16"

71

(1163mm)

71

7.0 ELECTRICAL CONNECTIONS

78

Electrical Connections

80

8.0 PIPING

82

INCORRECT

83

INCORRECTINCORRECT

83

General Guidelines

84

8.2 Refrigeration Piping

85

Fan Speed Control Piping

88

Fan Speed Charging

89

Lee-Temp Piping

90

Lee-Temp Charging

91

9.0 PIPING SCHEMATICS

92

For systems with drycoolers

94

CUSTOMER

95

HEAT REJECTION

95

LIEBERT DS UNIT

96

(and associated piping)

96

Piping Schematics

100

FRONT OF UNIT

101

Front View

101

Section A-A

101

DPN000803

101

Front of Unit

102

DPN000804

102

DPN000900

103

DPN000928

104

DPN000929

105

DPN000933

106

DPN001014

107

DPN001015

108

15-3/16"

109

FRONT SECTION VIEW

110

DPN001119

110

15-7/8"

111

FRONT SECTION VIEW OF UNIT

112

(Left Front Panel Not Shown)

112

TOP VIEW OF UNIT

112

Top View

113

Left Side Section View

113

Front Section View

113

FRONT SECTION VIEW OF UNIT

115

Front Of Unit

116

DPN001258

116

10.2 Electrical

117

10.3 Piping

117

10.4 Other

117

WARNING

118

12.0 MAINTENANCE

121

12.2 Blower Drive System

122

12.2.1 Upflow Motor Access

123

12.2.2 Belt Removal

123

Maintenance

124

Correct Switch Orientation

125

Incorrect Switch Orientation

125

DPN000996

125

12.4.1 Condensate Drain

126

12.4.2 Condensate Pump

126

12.7 Compressor

127

12.8 Compressor Replacement

128

12.10.1 Cleaning Instructions

129

12.11.3Drycooler Settings

131

AINTENANCE CHECKLIST

132

HVAC Maintenance Checklist

133

Glycol Pump

134

SL-18825_REV07_05-08

136





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