Basler Electric BE1-32R - Manual (Page 35)

Outputs
BE1-32R and BE1-32O/U relay outputs are divided into three categories: Overpower and Underpower,
Auxiliary, and Power Supply Status.
Overpower and Underpower Outputs
A dedicated output relay is provided for each overpower and underpower protection function. The BE1-
32R is equipped with a set of overpower output contacts that are configured as normally-open (NO) or
normally-closed (NC). The BE1-32O/U is equipped with a set of overpower output contacts and a set of
underpower output contacts. The BE1-32O/U outputs may be any combination of NO or NC contact
configurations. Output contact configuration is determined by the output digit of the relay style number.
Auxiliary Outputs
Auxiliary output contacts are supplied when specified by the Option 3 digit of the relay style number.
Auxiliary outputs are provided for both overpower and underpower protection functions. The auxiliary
output contacts may be NO, NC, or single-pole, double-throw (SPDT).
Power Supply Status Output
The power supply status relay has a set of NC contacts and energizes when operating power is applied to
the BE1-32R or BE1-32O/U. If either side of the power supply output (+12 Vdc or –12 Vdc) fails, the
power supply status relay de-energizes and closes the power supply status output contacts. Shorting bars
within the relay case short-circuit the power supply status output when the upper connection plug is
withdrawn from the case.
Output Test Pushbuttons
The output test pushbuttons allow testing of the overpower and underpower outputs and optional auxiliary
outputs. To prevent accidental operation, the pushbuttons are recessed behind openings in the front
panel. An output is tested by inserting a nonconductive rod through the access holes.
Power Supply
Operating power for the relay circuitry is supplied by a wide-range, electrically isolated, low-burden power
supply. The power supply operating power input is not polarity sensitive. The front panel Power Indicator
and power supply status output indicate when the power supply is operating. Power supply specifications
are listed in Table 1-3.
Target Indicators
Target indicators are optional components selected when a relay is ordered. The electronically latched
and reset targets consist of red LED indicators located on the relay front panel. A latched target is reset
by operating the target reset switch on the front panel. If relay operating power is lost, any illuminated
(latched) targets are extinguished. When relay operating power is restored, the previously latched targets
are restored to their latched state.
A relay can be equipped with either internally operated targets or current operated targets.
Internally Operated Targets
The relay trip outputs are directly applied to drive the appropriate target indicator. Each indicator is
illuminated regardless of the current level in the trip circuit.
Current Operated Targets
A current operated target is triggered by closure of the corresponding output contact and the presence of
at least 200 milliamperes of current flowing in the trip circuit.
NOTE
Prior to September 2007, BE1-32 and BE1-32O/U target indicators consisted of
magnetically-latched, disc indicators. These mechanically latched target
indicators have been replaced by the electronically latched LED targets in use
today.
9171100990 Rev T BE1-32R, BE1-32O/U Functional Description 3-7