Amalgen 7021 Application, Maintenance And Installation Manua
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Amalgen Model 7021-7025 DC Backup UPS Manual Revision 1 Model 7021 and 7025 Series Amalgen Technologies Pty. Ltd. 43 Anderson road Mortdale NSW 2223 Australia 18/10/06 7021 and 7025_manual1.doc Page 1 of 7
Amalgen 7021, DC Backup UPS Application, Maintenance and Installation Manual Revision 1 Manual Contents 1 Introduction....................................................................................................................................... 2 2 Product range.....................................................................................................................................2 3 Application.....................................................................................................................................
Amalgen 7021, DC Backup UPS Application, Maintenance and Installation Manual Revision 1 3 Application Most equipment uses DC power, even if it is connected to the AC mains. Certain types of equipment used in process control, use only 12VDC, which is usually supplied by the AC main via a transformer. The 7021 and 7025 series allows users of this type of equipment to have “no-break” power no matter what the condition of the AC main. The use of the DC backup unit is shown below. 12VDC system supplied only from AC mains and AC UPS 12VDC system supplied by 7021 and 7025 series back-up unit Figure 3 Figure 3 (AC only supply) shows a load, which is supported by a traditional UPS.
Amalgen 7021, DC Backup UPS Application, Maintenance and Installation Manual Revision 1 Calculation example: 2 Amps backup is required for 8 hours. a) Multiply Amp x Hours (8 x 2 = 16). This gives 16Ahrs. Nearest size DCUPS would be 17Ahrs. b) Look at Figure 3.1. The discharge time, in this case 8 Hrs, shows that approx. 90% of the 17Ah will be available from a fully charged battery c) Check: 17 * 0.9 = 16 approximately so this unit will just satisfy the load The curve above shows the probable available Ampere-hour capacity for varying time periods ove
Amalgen 7021, DC Backup UPS Application, Maintenance and Installation Manual Revision 1 The main components of the 700x series are shown in the following block diagram. AC in Figure 4 7021 and 7025 series Block diagram 5 Monitoring Analog monitoring The status of the unit is indicated on the front panel, and remotely, via voltage-free contacts. The following table shows the details. CONDITION LOCAL (LEDs) REMOTE (RELAYs) Charger OK Green light if OK N/O contact closes if OK DC available Green light if V load over 18VDC - Low Voltage alarm Red light if V batt is under 20VDC N/O contact opens on low battery 18/10/06 7021 and 7025_manual1.doc Page 5 of 7 Linear
Amalgen 7021, DC Backup UPS Application, Maintenance and Installation Manual Revision 1 6 Installation Fit this unit in locations where personnel access is restricted. Personnel with access must be trained in electrical safety and be familiar with procedures for avoiding electrical shock. Allow room in 19 inch rack for airflow around case. Wiring AC input Unit must be connected to mains earth. Provide external protection, as there is no AC fusing inside unit. DC output DC output wiring size should comply with wiring codes. We recommend 1.5mm up to 17Ah, 2.5mm for 40Ah. (keep wiring short) Connection of the output is from terminal block, marked + E --. To install as earthed supply connect output
Amalgen 7021, DC Backup UPS Application, Maintenance and Installation Manual Revision 1 Battery life depends on battery type, actual use and average temperature. Long life batteries will last 10 years, whilst standard batteries will last 3-5 years. Battery sizes and types are given below: UPS capacity (batt weight each) Battery dimensions (HxWxD) Battery types Powersonic/Powerblock 17Amp-hour (6.3kg) 19 inch rack x 2U x 170 PS12170 / PB12170 40Amp-hour (14kg) 19 inch rack x 4U x 170 PS12400 /PB12380 8 Specification Design type DC UPS with integral charger
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