EXPANDABLE DC POWER SUPPLY N+1 DC Power System with Battery Backup / Charging Function MODELS : SEC-40BRM SEC-60BRM SEC-80BRM SEC-100BRM INSTALLATION & OPERATING MANUAL Please read this manual before operating your power supply.
• PROVIDES N + 1 REDUNDANCY • ALLOWS CONNECTION OF EXTERNAL BATTERIES FOR BACKUP • EXPAND OUTPUT POWER BY ADDING POWER MODULES • UP TO 100 AMPS CONTINUOUS POWER • VOLT / AMPERE METER • OPERATION STATUS L.E.D. • FAN FAILURE ALARM AND WARNING L.E.D.
TABLE OF CONTENTS Topic Page Important safety instructions 1,2 Description and application 3 Design and principle of operation 3 Cooling and warning for fan failure 3 Front panel controls and indicators 4 Rear panel controls 4,5 Protections 5 Installation and operation 6 Operation of battery back-up 7 Output voltage adjustment 8,9 Installation and removal of modules 9,10 Trouble shooting 11,12 Limiting electromagnetic interference 13,14,15 Specifications 16 Appendix : 17,18 F
IMPORTANT SAFETY INSTRUCTIONS Please read before using your power supply. CAUTION ! ALL ELECTRICAL INSTALLATIONS MUST MEET LOCAL AND NATIONAL WIRING CODES AND SHOULD BE PERFORMED BY A QUALIFIED ELECTRICIAN. OPERATION OF COOLING FAN THE HEAT PRODUCED IS EXTRACTED BY 2 FANS. IN CASE ANY OF THE FANS FAILS, LIGHT AND SOUND ALARMS WILL BE ACTIVATED.
LOAD AND BATTERY CONNECTIONS THE LOAD & BATTERY TERMINALS ON THE POWER SUPPLY HAVE A TUBULAR HOLE OF DIAMETER 8mm (0.31”) WITH A SET SCREW. ALWAYS ENSURE THAT THE CONNECTIONS ARE SECURE AND THE SCREWS ARE TIGHTENED PROPERLY. LOOSELY TIGHTENED CONNECTIONS RESULT IN EXCESSIVE VOLTAGE DROP AND MAY CAUSE OVERHEATED WIRES AND MELTED INSULATION. THE ENDS OF THE CABLES TO BE CONNECTED TO THE LOAD AND BATTERY TERMINALS ON THE POWER SUPPLY SHOULD HAVE PIN TYPE OF CONNECTOR FOR MAKING A FIRM CONNCECTON.
DESCRIPTION This is a 19 inch, 2U height (3.5”) Rack Mount Power Supply which converts 120 V , 60 Hz. AC power into regulated 14.2 V DC , +/- 1% (At module output*) delivering up to a maximum of 100 A continuous ( up to 115 A surge ) with 5 Base Level PCB Modules. There is provision to connect the power supply to an external battery for backup power in the case of an AC power failure and re-charge the battery when AC power resumes. *Voltage at output terminals Load+ & Load- will be 13.
A warning circuit monitors the operational condition of the fans. In case of a fan failure, a buzzer will sound and the red LED indicating “FAN FAILURE” will light up. The unit should be switched off immediately and the defective fan should be replaced. NEVER LOAD THE UNIT WHEN THERE IS AN AUDIBLE ALARM AND THE FAN FAILURE LED IS ILLUMINATED. The 2 fans are rated for 12 V nominal and are powered from the output voltage of the modules.
REMOTE MONITORING AND SIGNALLING A provision has been made for remote signaling and monitoring of the following operational conditions and parameters: 1. Operational status of the 5 Power Supply Modules (PSM) 2. Failure condition of the cooling fan(s) 3. Availability of AC input power 4. Output voltage measurement 5. Output current measurement ( Voltage across an internal shunt with Shunt ratio of 50 mV / 100 A or 0.
FAN FAILURE WARNING INDICATOR AND ALARM: If forced air cooling is stopped due to failure of any one or both the fans, the red “FAN FAILURE“ LED will be illuminated and an alarm buzzer will be activated. At the same time, a “High” signal will be fed to the opto-coupler for signaling “fan failure” for remote monitoring (see Page 5). The unit is required to be switched off immediately as loss of forced air cooling may result in major damage to the unit. INSTALLATION AND OPERATION 1.
OPERATION OF BATTERY BACK-UP WARNING! D1, D2 R1, R2 R THE BATTERY SHOULD BE LOCATED IN A WELL VENTILATED AREA TO SAFELY DISSIPATE HYDROGEN GAS PRODUCED DURING THE CHARGING PROCESS. SCHOTTKY DIODE: 30V, 180A POWER RESISTOR: 0.78 OHM, 35W STATIC LOAD RESISTOR: 120 OHM, 5W FUGURE A. Please refer to the schematic at fig. A above. Regulated output voltage of 14.2VDC +/ - 1% from the modules ( measured at screw terminals S5 and S6 (Fig.
If the input A.C. power is interrupted, the external battery feeds the load instantaneously through the Schottky Diode D2 (D2 will by-pass the resistors R1 & R2). Voltage available to the load will be approximately 0.4V lower than the battery voltage due to forward voltage drop across D2. Availability of AC power is signaled for remote monitoring through an opto-coupled signal through the D-Sub connector (see page 5 under “Remote monitoring & Signaling”).
The output voltage of the paralleled modules or the common DC bus (before the Schottky Diodes D1) can be adjusted between 13.8 V and 14.6 V by adjusting the voltage of each module individually as per the following procedure ( This procedure is explained for SEC-100BRM which has 5 modules ). The voltage at the output terminals LOAD + and LOAD – will be as follows : At no external load At 10A load At loads > 10A Module voltage minus 0.2V Module voltage minus 0.4V Module voltage minus 0.
UPGRADING TO HIGHER CAPACITY – INSTALLING ADDITIONAL MODULE(S) Additional optional module(s) (Model No. SEC-2012MPSB) can be added to upgrade the output current capacity of SEC-40BRM / SEC-60BRM / SEC-80BRM by steps of 20A to a maximum of 100A. For example, an SEC-40BRM (40 A, with 2 modules) can be upgraded to SEC-60BRM (60A) by adding 1 more module or to SEC-80BRM (80A) by adding 2 more modules or to SEC-100BRM (100 A) by adding 3 more modules.
REMOVING A DEFECTIVE MODULE 1. Remove the top cover plate by unscrewing the 10 screws. 2. Locate the defective module. Remove the 6 screws from S1 to S6. 3. Remove the input power supply wires from terminals “L” and “N”. Insulate the wire terminals with insulating tape 4. Remove connectors from terminals “LED 1 & LED 2” . 5. Remove the “SHARE BUS” wire female socket connector from the terminal “JUMP1”.
“ PSM STATUS ” LED(S) DOES NOT LIGHT UP · The associated module has become defective. The unit will still operate normally as the remaining working modules will share a higher load. The unit will go into current limit and the output voltage will drop if the load drawn is more than the combined maximum rated output of the remaining modules. Reduce the load so that the maximum load drawn is less than the combined maximum rated output of the working modules.
LIMITING ELECTROMAGNETIC INTERFERENCE (EMI) 1. Switched mode power supplies ( SMPS ) employ high frequency switching and thus, are a source of radio interference, a recipient of radio interference and a conduit of radio interference. ( Older linear type transformer based power supplies do not employ high frequency switching voltages and will be quieter as compared to switching type of supplies ). 2.
5. The conducted RF noise from these power supplies is limited to the maximum allowable levels by internal filtration. The filtered RF noise currents are bypassed to the chassis of the power supply. The chassis is, in turn connected to the earth ground pin of the AC input power cord (for Class 1 units). Thus, the filtered noise currents are intentionally leaked to the earth ground. This is termed as the “Earth Leakage Current”.
c. Twist the positive and negative wires from the output of the power supply to the radio d. The DC side positive and negative outputs of these power supplies are isolated from the chassis. As explained at paragraph 5 above, the noise currents are filtered to the chassis ground and the chassis ground is connected to the earth ground through the earth ground pin of the AC power outlet receptacle. Avoid connecting (referencing) the DC negative output terminal of the power supply to the earth ground. e.
SPECIFICATIONS SEC-40BRM SEC-60BRM SEC-80BRM NO. OF MODULES 2 INPUT VOLTAGE RANGE 105 TO 125 V AC, 60 HZ INPUT CURRENT 8A 3 SEC-100BRM 4 12A 16A 5 20A OUTPUT VOLTAGE (At terminals L+ & L- , See page 7) • NOMINAL, VDC 13.8 V • NO LOAD, VDC 14 V • FULL LOAD, VDC 13.65 V 13.55 V 13.45 V OUTPUT REGULATION (At module output S5, S6—Fig. 1) 13.
Figure 1. 17.
Figure 2. “ Daisy Chaining “ of “Share BUS “ jumpers ( Jump 1 ) PSM 1 PSM 2 PSM 3 PSM 4 PSM 5 1 1 1 1 1 2 2 2 2 2 PCB ( Printed Circuit Board ) Jump 1 Jump 1 Jump 1 Jump 1 Jump 1 1. Female socket terminal of the daisy chain. 2. Male 2 pin terminal marked “Jump 1“ on the Power Supply Module. CONTINUITY OF “ DAISY CHAIN “ CONNECTIONS Removing any end module (example PSM1/PSM5 in Fig. 2 above) does not break the daisy chain.
2 YEAR Limited Warranty This product manufactured by Samlex America, Inc. (the “Warrantor”) is warranted to be free from defects in workmanship and materials under normal use and service. This warranty is in effect for 2 years from the date of purchase by the user (the “Purchaser”) If the defective product is within the warranty period, the Purchaser should contact the place of purchase to obtain a Return Authorization Number.
Attach copy of receipt here for your records: Date purchased: Purchased from: Additional notes: 20.
Thank you for purchasing a Samlex power supply product ! Samlex America Inc. 110 –17 Fawcett Road Coquitlam, B.C.
