Basler BE1-40Q, Instruction Manual

3-4

BE1-40Q Functional Description

Power Supply

Basler Electric enhanced the power supply design for unit case relays.  This new design created three, wide
range power supplies that replace the five previous power supplies.  Style number identifiers for these power
supplies have not been changed so that customers may order the same style numbers that they ordered
previously.  The first newly designed power supplies were installed in unit case relays with EIA date codes
9638 (third week of September 1996). Relays with a serial number that consists of one alpha character
followed by eight numerical characters also have the new wide range power supplies.  A benefit of this new
design  increases  the  power  supply  operating  ranges  such  that  the  48/125  volt  selector  is  no  longer
necessary.  Specific voltage ranges for the three new power supplies and a cross reference to the style
number identifiers are shown in the following table.

Table 3-1. Wide Range Power Supply Voltage Ranges

Power Supply

Style Chart Identifiers

Nominal Voltage

Voltage Range

Low Range

R

24 Vdc

12

†

 to 32 Vdc

Mid Range

O, P, S

48, 125 Vdc,

120 Vac

24 to 150 Vdc,

90 to 132 Vac

High Range

T

125, 250 Vdc,

120, 240 Vac

62 to 280 Vdc,

90 to 270 Vac

†

 14 Vdc is required to start the power supply.

Relay operating power is developed by the wide range, isolated, low burden, flyback switching, solid state
power supply.  Nominal ±12 Vdc is delivered to the relay internal circuitry.  Input (source voltage) for the
power supply is not polarity sensitive.  A red LED turns ON to indicate that the power supply is functioning
properly. 

Power Supply Status Output

A  normally  closed  output  relay  may  be  provided,  whose  contact  remains  open  when  energized  by  the
presence of nominal voltage at the output of the power supply.  If the power supply voltage fails or falls
below requirements, the power supply status output relay will deenergize, closing its contact.

A  shorting  bar  is  included  in  the  relay  case  so  that  the  status  output  terminals  can  provide  a  remote
indication that the BE1-40Q Relay has been withdrawn from its case or taken out of service by removing the
connection plug.

If the power supply status output is provided, then auxiliary output contacts are not available.