In large storages the handling forklifts are used during several shifts. Instead of charging the whole forklift vehicle they use interchangeable battery modules. To change such battery it takes some minutes. On the forklift, the driver has direct contact with the logistic system via a computer connected to a radio LAN. Those computers use Windows® Operating system and they do not like sudden power down. Polyamp developed together with suppliers of forklift computers a DC UPS that overcome this problem.
The DC-UPS works for about 15 minutes. It use the RS232 standard UPS signalling methods supported by Windows® to switch off the computer in a controlled manner.
The battery is an environmental friendly NiMh. The integral battery charger can fully charge the battery within 2h, as many such situations can happen per day. In normal operation it supplies the computer and charge the battery.
Input voltage +18V 2.7A
Rated power in UPS mode: 30W 12V 3A. (Uout typ.=10.5V)
Stop voltage: 10V.
PM50B18-18 and PM50C18-18 are optimised to
The diode box is an accessory mainly for PU500 models (see page 11) but can be used with any other
DC/DC converter or power supply. The advantage of using the diode box is that the series diode thermal losses can be put outside the converter and there is no need to derate the output current.
The PU500 models do not have built-in series diodes as a standard feature. To achieve redundancy, we can either supply this diode box or use built in series diodes, then the PU500 output current is derated
Diodbox 24V | Diodbox 28 - 110V | |
Number of diode | 2 | 2 |
Max connected voltage | 30Vd.c. | 130Vd.c. |
Max Current each diode | 21A | 14A |
Operating temperature | -25 - +55°C | -25 - +55°C |
Dimension (H x W x D) | 48x106x189mm | 48x106x189mm |
Isolation in and output to case | 2,5kVd.c. | 2,5kVd.c. |
Weight | 0.47kg | 0.47kg |
PA355 is a current regulator with 4 outputs. It is used for supplying current to safety relays on train or track-side applications. It automatically compensate for changes in feeding cable lengths up to 4km.
PA355 is able to feed 4 individual relays, with common zero. Each output has surge arrestors as protection.
It also handles a redundant input voltage (110V) with individual alarms. The voltage source is usually one or two (for redundancy)
PM50C60-60
Iout1= | 10 or 12mA | Uout max= 120V |
Iout2= | 10 or 12mA | Uout min= 40V |
Iout3= | 10 or 12mA | Uin alarm: Max 30Vd.c.; 0,1A |
Iout4= | 10 or 12mA | Ta=-20 to +55°C |
EMC According to SS4361503 PL5 | ||
PE60 is a compact DC/DC converter block with very wide input voltage range. Is intended for vehicels, forklift and train applications. Has two versions one for own self cooling the other via mounting on metallic structure. The connection is made by industrial grade screw connector. CE marked for all safety and relevant EMC demands for an apparatus type of unit.
Input voltage range: 18 -72Vd.c. Cranking down to 12V 100ms
(Nominal input 24, 48 V)
Output voltage: 13.2V 4.5A @ -25 to +50°C
Pending model: Input: 50-150Vd.c. Cranking down to 30V 100ms
(Nominal input 60, 72, 96, 110 V)
Applicable standards: EN50155, IEC60571, EN50121-3-2, EN61000-6-2,EN61000-6-4
special modells
Updated: February 21, 2006
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