Versitron Fiber Optic Modem Manuals Resource


AC150W

POWER SUPPLY / SYSTEM MONITOR


TECHNICAL MANUAL


See Technical Data Sheet

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www.versitron.com

Revision D


Copyright January 2002


VERSITRON, Inc.

83 Albe Drive / Suite C

Newark, DE 19702





PROPRIETARY DATA


All data in this manual is proprietary and may not be disclosed,

used or duplicated, for procurement or manufacturing purposes,

without prior written permission by VERSITRON, Inc.


WARRANTY




All VERSITRON products purchased after January 2001 carry a limited lifetime warranty against defects in material and workmanship. Purchases made prior to January 2001 are warranted for a period of one year from date of delivery. VERSITRON reserves the right to repair or, at our option, replace parts which during normal usage prove to be defective during the warranty period provide that:



1.    You call VERSITRON at 302-894-0699 or 800-537-2296 and obtain a Return Maintenance Authorization (RMA) Number. Please reference your RMA number on the outside of the box in which the item is shipped.

2.    Shipping charges are pre-paid.

No other warranty is expressed or implied and we are not liable for consequential damages. For repairs outside of the warranty period, the same procedure must be followed.


TABLE OF CONTENTS

SECTION 1: DESCRIPTION OF EQUIPMENT

1.1    INTRODUCTION

1.2    DESCRIPTION OF EQUIPMENT

1.2.1  Functional Characteristics

1.2.2  Physical Characteristics

1.3    SPECIFICATIONS


SECTION 2: INSTALLATION

2.1  GENERAL

2.2  INSTALLATION IN CHASSIS

2.3  POWER REQUIREMENTS

2.4  INITIAL CHECKOUT PROCEDURE


SECTION 3: OPERATION

3.1  INTRODUCTION

3.2  STATUS INDICATORS

3.3  SWITCHES

3.4  ALARMS

3.5  REDUNDANT POWER CONFIGURATIONS


SECTION 4: THEORY OF OPERATION

4.1 INTRODUCTION

SECTION 5: MAINTENANCE AND TROUBLESHOOTING

5.1 INTRODUCTION

5.2 FAULT ISOLATION

LIST OF ILLUSTRATIONS

1. MODEL AC150W POWER SUPPLY / SYSTEM MONITOR

2. MODEL AC150W BACK PANEL - ALARM RELAY CONTACTS


SECTION 1

DESCRIPTION OF EQUIPMENT



1.1    INTRODUCTION

The manual provides information on the installation and operation of the Model AC150W Power Supply / System Monitor. Chapter 1 contains a general description of the product. Chapter 2 contains installation instructions. Chapter 3 contains operating instructions. Chapter 4 provides the theory of operation. Chapter 5 contains maintenance and troubleshooting information. Figure 1 shows a photograph of the AC150W.


1.2    DESCRIPTION OF EQUIPMENT


1.2.1 Functional Characteristics

The Model AC150W Power Supply / System Monitor provides DC power to any VERSITRON FOM II fiber optic modem products when used in the Model HF20 FOM II rack-mount chassis. The power supply is designed for a redundant power configuration and includes provisions for alarm monitoring.


1.2.2    Physical Characteristics


The Model AC150W Power Supply / System Monitor measures 7.0" (17.78 cm) high x 1.7" (4.32 cm) wide x 12.0" (30.48 cm) deep, similar in size to a VERSITRON FOM II circuit card but twice as wide. The Model AC150W occupies two slots of the Model HF20 chassis. Like the FOM II modems the AC150W has a 12-pin power connector on its back panel that must seat properly as the unit is slid completely into the HF20 chassis. The front panel of the AC150W contains two switches: POWER on/off, and alarm contact off (AC) / Alarm reset. The front panel also contains five indicator LEDs: AC Power, System OK, PS Alarm, System Alarm and ACO.


FIGURE 1. MODEL AC150W

POWER SUPPLY / SYSTEM MONITOR

1.3    SPECIFICATIONS

Power Requirements : Input – 115/230 VAC, ± 10%; 47-63 Hz (auto selected).

Output – 12 VDC, 12.5 Amp.

Line Fuse : For 230 VAC operation – 3AG, 1 Amp, 250 V slo-blo.

For 115 VAC operation – 3AG, 2 Amp, 250 V slo-blo.

Alarm Relay Contacts: Rated for 1000 Vrms, 60 Hz between open contacts. 1500 V FCC Part 68 surge test isolation.

Dimensions : 7.0H x 1.7W x 12.0L in. (17.78 x 4.32 x 30.48 cm).

Environment : 0° to +40°C (32° to +104°F) operating temperature; up to 95% relative humidity (non-condensing); up to 10,000 feet altitude; storage temperature -40° to +70° C.

Thermal Considerations : 0° to +30°C (32° to +86°F) with natural convection not impeded; external forced air cooling with airflow of 100 linear feet per minute will allow full rated power at up to +40°C (+104°F)..

Weight: 40 oz (2 lb 12 oz) 1.25 kg).


SECTION 2

INSTALLATION

2.1    GENERAL

This chapter contains information on the installation and initial checkout of the Model AC150W Power Supply / System Monitor. Paragraph 2.2 contains general information on the chassis installation. Paragraph 2.3 describes the input power requirements. Paragraph 2.4 contains initial checkout procedures.

2.2    INSTALLATION IN CHASSIS

The Model AC150W Power Supply / System Monitor is designed to fit into the Model HF20 FOM II chassis only. (The HF20 fits onto a standard 19-inch equipment rack.) The power supply is used with from one to 18 FOM II modems with the following exception:

NOTE: Due to the current draw of the F2238 or F2240 High-Speed Modem, only 11 units may be operated at one time with the AC150W. Please review information on the HF-20A and AC300WR for fully populated chassis applications.

Fully redundant power may be realized by simply adding a second AC150W. The power supply is installed by inserting both the top and bottom edge of the circuit card (left side of unit) into the slot guides of the HF20. Push the unit fully into the chassis so that there is a full connection between the 12-pin power connector on the back panel and the chassis. The front panel of the AC150W contains two hand screws to secure the unit to the chassis.

2.3    POWER REQUIREMENTS

The Model AC150W Power Supply / System Monitor operates with either a 115V or 230 VAC power source. The unit recognizes the input voltage; there is no switch for 115V or 230V. There are two different fuses and labels supplied with the AC150W. For 115 VAC operation, a 3AG, 2 Amp, 250 V slo-blo fuse is used; for 230 VAC operation, a 3AG, 1 Amp, 250 V slo-blo fuse is used. Prior to connecting to an AC power source, check that the proper fuse is installed and that the AC power cord is connected to the AC150W.

2.4 INITIAL CHECKOUT PROCEDURE

Once installed, the AC150W requires no adjustments. Before beginning system operation the following items should be checked to verify proper installation:

Verify that the 12-pin power connector from the AC150W is fully connected to the HF20 chassis by confirming that the power supply is fully inserted and secure in the chassis slots.

Verify that the correct fuse and the AC power cord are installed as described in Section 2.3 above.

When turning the unit on with the front panel power switch, the AC POWER (green) and SYSTEM ALARM (red) LEDs should illuminate. Press the Alarm Reset switch to initialize the system alarm status. After the Alarm Reset, the System OK (green) LED should come on, the SYSTEM ALARM (red) LED should go off, and the other two LEDs should be off.

If a malfunction is detected during the initial checkout procedure, refer to Chapter 5 for information on isolating the malfunction in the unit.

SECTION 3

OPERATION

3.1    INTRODUCTION

This chapter contains a description of the operating controls of the Model AC150W Power Supply / System Monitor. The AC150W is designed for continuous and uninterrupted operation. Once the power supply is installed into the HF20 chassis it should remain in service as long as required.

Warning: The power supply circuit contains hazardous voltage levels. Do not remove the cover. There are no user-serviceable parts inside.

3.2    STATUS INDICATORS

The AC150W has five LED indicator lamps on its front panel. AC POWER (green) is illuminated when AC power is applied to the unit, the power switch is ON, and the fuse is installed into the back panel and unbroken. The SYSTEM OK LED (green) is illuminated when there are no active status alarms in the system (FOM II card circuits and AC150W). Two red LEDs provide alarm indications: PS ALARM is on if the DC output voltage drops below 10 volts, and the SYSTEM ALARM comes on if a circuit card alarm is sensed on the alarm bus of the HF20. An ACO LED (yellow) is illuminated when the ACO front-panel switch is activated.

3.3 Switches

There are two switches on the front panel of the Model AC150W Power Supply / System Monitor. The power switch controls the AC input. The ACO (alarm contact off) / Reset switch has three positions. In the upper position this switch disables the alarm contacts that are available on the back panel of the AC150W. When the switch is pressed into the lower position, the alarms are cleared. The switch can be left in the upper position, but must be pushed and held in the lower position. In the center position the switch is OFF.

3.4 Alarms

The Model AC150W Power Supply / System Monitor contains circuitry to monitor the Model HF20 alarm bus, the switching power supply of the unit, and to control an SPDT relay for alarm reporting. Remote alarm monitoring is possible with the alarm contacts contained on a terminal block on the back panel of the unit. The location of the alarm relay contacts is shown in Figure 2. These contacts change state when an alarm (FOM II or AC150W) occurs in any circuit card installed in the HF20 chassis, provided that the alarm contact switch (ACO) is not enabled on the front panel of the AC150W. The AC150W alarm circuitry monitors all alarms set by each circuit card, and will therefore change the relay state when there is a loss of sync (such as due to a possible failure of fiber) on a FOM II card. The contacts are labeled NO (normally open), C (common), and NC (normally closed). Normally open means that the contact between NO and C will close when in alarm. The contacts are rated for 1000 Vrms, 60 Hz between open contacts, with 1500 V FCC Part 68 surge test isolation. The F22XX circuit cards provide a +0.6 VDC alarm voltage, while all other FOM II cards (F2400, F2700 and F2800 series) provide +1.8 VDC.

FIGURE 2. MODEL AC150W POWER SUPPLY / SYSTEM MONITOR

BACK PANEL ALARM RELAY CONTACTS

3.5 Redundant Power Configuration

The Model AC150W Power Supply / System Monitor is designed to operate in a redundant power configuration. This is accomplished by simply adding a second AC150W to the HF20 chassis, in any remaining card slots. The alarm circuits may also be made redundant by wiring the NO-C contacts of each power supply in parallel, or by wiring the NC-C contacts in series.

SECTION 4

THEORY OF OPERATION

4.1    INTRODUCTION

The second generation of VERSITRON FOM II Series fiber optic modem and interface extender products are designed to operate with 12 VDC input power. The Model AC150W Power Supply / System Monitor has been developed to provide adequate power to up to 18 FOM II modems in a Model HF20 chassis with the following exception:

NOTE: Due to the current draw of the F2238 or F2240 High-Speed Modem, only 11 units may be operated at one time within the HF20.

In addition, the AC150W has circuitry to monitor the HF20 alarm bus. The unit takes an input of 115 or 230 volts AC and transforms it into a 12 volt DC output with 12.5 amp current. The AC150W consists of a shielded AC transformer with heat sink and mini fan, and a printed circuit board containing the LED drivers, fuses, switching, and alarm contact circuitry. The unit is enclosed in an aluminum alloy housing.

SECTION 5

MAINTENANCE AND TROUBLESHOOTING

5.1    INTRODUCTION

This chapter contains general information designed to isolate a malfunction in the Model AC150W Power Supply / System Monitor to a replaceable unit. These units are not individually equipped with redundancy. Therefore, a failure in one of these units would interrupt service.


5.2    FAULT ISOLATION

The Model AC150W Power Supply / System Monitor has AC POWER and SYSTEM OK LEDs which should be illuminated. If the AC POWER LED is not on, check the AC power cord for proper connection to both the AC150W and the source. If the AC POWER LED is on but the other status indicators are not correct, first check that the 12-pin power connector from the AC150W is fully connected to the HF20, i.e. the AC150W is fully inserted into the slots and secure. Next proceed with the fault isolation procedures for the FOM II modems sharing the HF20 chassis with the power supply. If you believe that there is a problem with the AC150W, please contact VERSITRON Customer Service for assistance.



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