Basler Electric BE1-79A 9310200114 - Manual (Page 22)

Operating Power
Operating power for the internal circuitry is applied to the internal, isolated, switching power supply. The
power supply operates over a range of 120 to 240 Vac or 125 to 250 Vdc with no connection changes or
jumpers required. The operating power input is not polarity sensitive and is not disrupted by variations in
the supply voltage or frequency over the power supply operating range.
Contact Sensing Inputs
The contact sensing inputs are designated 52a and 52b. Each input is optically isolated to electrically
insulate the input from external power sources. Each contact sensing input is rated for 48 to 250 Vdc and
120 to 240 Vac at 45 to 65 hertz.
Inputs can operate at any one of three jumper-
selectable voltage ranges. Table 3-1 lists the
nominal operating voltage for each of the three
jumper positions. Jumpers P3, P4, and P5 should
be set to the appropriate nominal voltage for the
installed system. Jumper P6 is not used in this
model. Instructions for placing each jumper in the
desired position are provided in Section 5,
Installation and Configuration. Input V5 is dedicated
to monitoring the relay power supply input and is
not jumper selectable.
Table 3-1. Contact Sensing Jumpers
Jumper Position Nominal Voltage
1 125 Vdc or 120 Vac
2 48 Vdc
3 250 Vdc or 240 Vac
NOTE
In certain applications where 240 Vac control voltage is used, control circuit
feedback can occur through system inductive coupling. This feedback can
result in erroneous signals, causing relay operation. If there is potential for
control circuit feedback, the jumper-selectable voltage range should be
changed from the 48 Vdc, factory-default setting to a higher value. Selections
are listed in Table 3-1.
The function of each input depends on the operating configuration of the relay. Tables 3-2 and 3-3
describe the function of each contact sensing input for each relay configuration. The GE nomenclature
used for each input is provided in parenthesis following each description.
Table 3-2. Contact Sensing Inputs Description
Input Terminals Description
52a 5 Connect to a 52a contact. When voltage is present at this point at the point
that the reset time is reached, or while the relay is in lockout, the relay will
return to the full reset condition.
52b 4 Connects to a 52b contact. When in reset , voltage sensed at this input will
result in the relay leaving reset and begin timing towards the first reclose. At
the point of reaching the reclose time, a reclose output will occur if the 52b is
still present. (See close output for description of anti-pump operation).
Reset Switch
This momentary-action switch clears the front-panel In Sequence or Lockout LEDs and restores the relay
to a reset condition. The reset switch performs the same function as the manual clutch release on the
ABB relay. Operating power must be applied to terminals 5 and 6 in order for a reset to occur.
Serial Communication Port
The communication port is a standard RS-232 (DB-9) female connector located on the front panel. This
port provides the means to read and configure BE1-79A settings.
3-2 BE1-79A Functional Description 9310200893 Rev C