Basler BE1-27, Instruction Manual

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3-6 FUNCTIONAL DESCRIPTION
TARGETS
Defined by the model and style numbers, magnetically latching target indicators may be provided for each
timed and instantaneous function. These targets are actuated in conjunction with their corresponding output
relays (internally operated), or by a minimum of 0.2 Adc flowing through the output relay's trip circuit (current
operated). Target indicators must be manually reset.
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 four 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). 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 Identifier Nominal Voltage Voltage Range
Low Range L 24 Vdc 12† to 32 Vdc
Mid Range J, K, Y 48, 125 Vdc,
125 Vac 24 to 150 Vdc
90 to 132 Vac
High Range Z 125, 250 Vdc,
120, 240 Vac 62 to 280 Vdc
90 to 270 Vac
† 14 Vdc required to start the power supply.
Relay operating power is developed by the wide range, isolated, low burden, flyback switching, solid state
power supply. N/- 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 (Option 2-A, B)
The power supply status output relay has normally closed (NC) output contacts. This relay is energized
upon power-up thus opening its contacts. Normal relay operating voltage maintains the power supply status
output relay continually energized and its output contacts open. However, if the power supply output voltage
falls below the requirements for proper operation, the power supply status output relay de-energizes, thus
closing the NC output contacts.