Table of Contents

1 Introduction to the Power Module· 1-1

Introduction· 1-1

Specifications· 1-2

Panel 1-3

Status LEDs· 1-3

2 Installing and Removing the Power Module· 2-1

Precautions· 2-1

Tools· 2-1

Installing and Removing the Power Module· 2-2

Installing the Power Module· 2-2

Removing the Power Module· 2-3

Connecting the Power Cord· 2-3

Connecting AC Power Cord· 2-3

Connecting DC Power Cord· 2-4

 

Introduction

The PSR750-A is an AC-input and DC-output power module. It can convert the input voltage to 12 V and –54 V as required, and its maximum output power is 750 W. The PSR750-D is a DC-input and DC-output power module. It can convert the input voltage to 12 V and –52 V as required, and its maximum output power is 1800 W.

Table 1-1 Features supported by the PSR750-A/PSR750-D

Feature	Description
Protection	Output over-voltage protection, output short-circuit protection, output current-limiting protection, and overheat protection.
Redundancy	Supports parallel connection of two power modules, thus implementing 1+1 redundant current sharing.
Hot swapping	When the device works normally, you can power off a power module of the 1+1 redundant power supply system and remove it from the device.

 

Auto-recovery support of the PSR 750-A/PSR750-D in the protection status is shown in Table 1-2.

Table 1-2 Protection functions of the PSR 750-A/PSR750-D

Model	Protection function	Status	Auto-recovery support
PSR 750-A	Over-voltage protection	No power supply with the power module deadly locked	Not supported
PSR 750-A and PSR750-D	Short-circuit protection	No power supply	Supported
PSR 750-A and PSR750-D	Current-limiting protection	No power supply	Supported
PSR 750-A and PSR750-D	Overheat protection	No power supply	Supported
PSR750-D	Wrong input polarity protection	No power supply	Supported

 

 

Specifications

Table 1-3 PSR750-A/PSR750-D specifications

Item	Specifications
Rated voltage range	PSR750-A: 100 VAC to 240 VAC; 50 Hz or 60 Hz PSR750-D: –48 VDC to –60 VDC
Max voltage range	PSR750-A: 90 VAC to 264 VAC; 47 Hz or 63 Hz PSR750-D: –40.5 VDC to –72 VDC
Output voltage (dual output)	PSR750-A: 12 V and –54 V PSR750-D: 12 V and –52 V
Max output current	PSR750-A: l      25 A for 12 V output voltage l      9 A for –54 V output voltage PSR750-D: l      25 A for 12 V output voltage l      32 A for –52 V output voltage
Max output power	PSR750-A: 750 W PSR750-D: 1800 W
Dimensions (H × W × D)	40.5 × 180.6 × 235 mm (1.59 × 7.11 × 9.25 in.)
Operating temperature	0°C to 55°C (32°F to 131°F)
Storage temperature	–40°C to +70°C (–40°F to +158°F)
Operating humidity	10% to 95%
Storage humidity	5% to 95%

 

 

Panel

Figure 1-1 Panel of the PSR750-A

(1) Power switch (push “O” to switch off and push “—” to switch on)	(2) AC receptacle
(3) Tab	(4) Power module handle
(5) Status LED for DC output	(6) Status LED for AC input
(7) Bail latch	(8) Captive screw

 

Figure 1-2 Panel of the PSR750-D

(1) Power module handle	(2) Tab
(3) DC input terminal (positive)	(4) DC input terminal (negative)
(5) Captive screw	(6) Status LED for DC output
(7) Status LED for DC input

 

Status LEDs

The PSR750-A/PSR750-D has two LEDs, which indicate the input status (AC OK) and output status (DC OK) of the power module. Table 1-4 describes the colors and working status of the LEDs in different cases.

Table 1-4 Description of the LEDs

Model	LED	Color	Status
PSR750-A	AC OK	Off	No power is input or an input failure occurs.
		On	The power input is normal.
	DC OK	Off	No power is output or an output failure occurs.
		On	The power output is normal.
PSR750-D	INPUT OK	Off	No power is input or an input failure occurs.
		On	The power input is normal.
	OUTPUT OK	Off	No power is output or an output failure occurs.
		On	The power output is normal.

 

In normal cases, the input LED of the PSR750-A power module turns on while the output LED is still off after you connect the power cord but leave the power module in the off state; the input and output LEDs both turn on after you power on and switch on the power module.

The input and output LEDs both turn on after you install the PSR750-D to the power module slot correctly and connect the power cord to the power module.

However, if the input LED is on but the output LED is off, this case may be caused by output short-circuit, output over-current, output over-voltage, or over-temperature. To solve such cases, take the following actions:

1)        For the PSR750-A power module, switch off the power module and disconnect the power cord, and then reconnect the power cord and switch on the power module to check whether the power module can work properly.

2)        For the PSR750-D power module, disconnect the power cord from the external power supply system and the power module, then reconnect the power cord with the power module and then the external power supply system, and switch on the power module to check whether the power module can work properly. 

3)        If the above action does not work, the case may be caused by over-temperature. Take actions to cool down the power module, and then it can work properly.

 

This chapter describes how to install and remove the power module and the power cord. To prevent damage to the device and personal injury, follow the power-on and power-off procedures illustrated in the following figures respectively.

Figure 2-1 Power-on procedure for PSR750-A

 

Figure 2-2 Power-off procedure for PSR750-A

 

Figure 2-3 Power-on procedure for PSR750-D

 

Figure 2-4 Power-off procedure for PSR750-D

 

Precautions

l          Wear an ESD-preventive wrist strap and ensure a good skin contact before installing or removing the power module.

l          Before installing the power module, make sure that the operating voltage provided by the external power supply system is consistent with that marked on the power module, and the output voltage of the power module is consistent with the powered device, thus to prevent damage to the power module and powered device.

l          Do not touch any naked wire or terminal. Doing so may result in a personal injury.

l          Never place the power module in wet locations and prevent fluid from leaking into the power module.

l          Do not often open the shell of the power module to prevent damage to the power module. If a failure occurs on the internal wires or units, contact the technical stuff to troubleshoot the problem.

Tools

You need to prepare the following tools for installation and removal:

l          flat-blade screwdriver

l          Phillips screwdriver

l          ESD-preventive wrist strap

Installing and Removing the Power Module

The installation/removal procedure of the PSR750-A and PSR750-D is similar. This manual takes the PSR750-A as an example to introduce the installation and removal of the power module.

 

 

Installing the Power Module

1)        Put on an ESD-preventive wrist strap, make sure that the wrist strap has a good skin contact and is well grounded.

2)        Take the power module from the package and check that the input mode of the power module is as required.

3)        Face the slot and plug in the power module.

4)        Insert the power module with the upside up. Grasp the handle of the module with one hand and hold the module bottom with the other, and then slide the module slowly along the guide rails into the slot (see callout 1 in Figure 2-5).

5)        Fasten the captive screws on the power module clockwise with a Philips screwdriver until the power module is fixed into the chassis (see callout 2 in Figure 2-5).

Figure 2-5 Install a power module

 

 

Removing the Power Module

1)        Put on an ESD-preventive wrist strap, make sure that the wrist strap has a good skin contact and is well grounded.

2)        Switch off the power module, disconnect the power cord from the power module and external power supply system, and remove the power cord.

3)        Face the power module to be removed from the powered device.

4)        Loosen the captive screws of the power module anti-clockwise with a Philips screwdriver until the captive screw falls off the powered device.

5)        Grasp the handle of the module with one hand and pull it out a little, and then hold the module bottom with the other, and then pull the module slowly along the guide rails out of the slot.

 

 

Connecting the Power Cord

After you insert the power module into the device, you can connect the power cord. For an AC-powered device, use an AC power cord to connect the external power supply system. For a DC-powered device, use a DC power cord to connect the external power supply system.

Connecting AC Power Cord

Follow these steps to install the power cord for PSR750-A:

1)        Switch off the AC power module, that is, turn the power switch of the module to the “O” position (see Figure 2-6).

2)        Pull the bail latch upwards (see Figure 2-6).

3)        Connect one end of the AC power cord shipped with the device to the AC receptacle on the module (see callout 1 in Figure 2-7).

4)        Pull the bail latch to the down to secure the plug to the AC receptacle (see callout 2 in Figure 2-7).

5)        Connect the other end of the AC power cord to the external power supply system.

Figure 2-6 Connect an AC power cord I

 

Figure 2-7 Connect an AC power cord II

 

 

Connecting DC Power Cord

To ensure normal PoE power supply to the S5800-60C-PWR using the PSR750-D, you need to select the RPS1000-A3 of H3C that provides a voltage range from –52V to –55V. Follow these steps to connect the PSR750-D to the RPS1000-A3:

1)        Use a Phillips screwdriver to loosen the captive screws and remove the washer of the PSR750-D, as shown in Figure 2-8.

2)        Insert the captive screws through the washers and OT terminals of the RPS power cords, as shown in callout 1 in Figure 2-9. Pay attention to the positive (+) and negative (-) marks on the power cords to avoid connection mistakes.

3)        Use the Phillips screwdriver to fix the RPS power cords to the PSR750-D, and ensure a good contact between the OT terminals and the PSR750-D, as shown in callout 2 in Figure 2-9.

4)        Connect the RPS connectors of the RPS power cords to the outputs OUTPUT1 and OUTPUT2 of RPS1000-A3 respectively, as shown in callout 3 in Figure 2-9.

5)        Use a flat-head screwdriver to fix the RPS connectors to the RPS1000-A3.

Figure 2-8 Remove the protective cover from the PSR750-D

 

Figure 2-9 Connect the PSR750-D to the RPS1000-A3