Specifications, Sensing input, Operating power input – Basler Electric BE1-81O/U User Manual
Page 47: Relay outputs, Output contacts, Target indicators (optional)

9137300990 Rev N
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Specifications
BE1-81O/U relays have the following features and capabilities.
Sensing Input
Voltage Range ..................................................... 40 to 132 Vac
Frequency 
Detection Range .................................................. 30 to 80 Hz (Revision D and subsequent) 
 
35 to 80 Hz (Revision C and previous)
Computation Range ............................................. 40 to 70 Hz 
Burden .................................................................. 2 VA maximum 
Operating Power Input
Relay operating power may be obtained from a wide variety of external voltage sources. When ordering, 
any one of five internal power supply types may be selected to match the operating power voltage level 
available at your site. Available power supply types are listed in Table 3. 
Table 3. Power Supply Types
Type
Input Voltage
Burden at Nominal
Nominal
Range
K (mid-range)
48 Vdc
24 to 150 Vdc
3.6 W
J (mid-range)
125 Vdc 
120 Vac 
24 to 150 Vdc 
90 to 132 Vac 
3.9 W 
16.0 VA 
L (low range)
24 Vdc
12 to 32 Vdc
*
3.7 W
Y (mid-range)
48 Vdc 
125 Vdc 
24 to 150 Vdc 
24 to 150 Vdc 
3.6 W 
3.9 W 
Z (high range)
250 Vdc 
240 Vac 
68 to 280 Vdc 
90 to 270 Vac 
3.9 W 
24.6 VA 
* The type L power supply initially requires 14 Vdc to begin operating. Once operating, the voltage may 
be reduced to 12 Vdc and operation will continue. 
Relay Outputs
One relay output is provided for each setpoint. Relay outputs can be specified as normally open or 
normally closed. One normally open or normally closed auxiliary relay output per setpoint is also available 
as an option. 
Output Contacts
Resistive Ratings 
120 Vac ............ Make, break, and carry 7 Aac continuously 
250 Vdc ............ Make and carry 30 Adc for 0.2 seconds, carry 7 Adc continuously, and break 0.3 Adc 
500 Vdc ............ Make and carry 15 Adc for 0.2 seconds, carry 7 Adc continuously, and break 0.3 Adc 
Inductive Ratings 
120 Vac, 125 Vdc, 250 Vdc........ Break 0.3 A (L/R = 0.04) 
Target Indicators (Optional)
Electronically-latching, manually-reset targets indicate that a setpoint contact has energized. Either 
internally-operated or current-operated targets may be specified. 
BE1-81O/U
Specifications
