9328900990 Rev L BE1-951 Installation 12-1
SECTION 12 • INSTALLATION
GENERAL
BE1-951 utility multifunction relays are delivered with an instruction manual and BESTCOMS software in
a sturdy carton to prevent shipping damage. Upon receipt of the relay, check the model and style number
against the requisition and packaging list for agreement. If there is evidence of shipping damage, file a
claim with the carrier, and notify the Basler Electric regional sales office, your sales representative, or a
sales representative at Basler Electric, Highland, Illinois.
If the BE1-951 is not installed immediately, store it in the original shipping package in a moisture and dust
free environment.
CONTACT SENSING INPUT JUMPERS
Four contact sensing inputs provide external stimulus to initiate BE1-951 actions. An external wetting
voltage is required for the contact sensing inputs. The nominal voltage level of the external dc source
must comply with the dc power supply input voltage ranges listed in Section 1, General Information,
General Specifications. To enhance user flexibility, the BE1-951 uses wide range AC/DC power supplies
that cover several common control voltages. The contact sensing input circuits are designed to respond
to voltages at the lower end of the control voltage range while not overheating at the high end of the
range.
Energizing levels for the contact sensing inputs are jumper selectable for a minimum of approximately 5
Vdc for 24 Vdc nominal sensing voltages, 26 Vdc for 48 Vdc nominal sensing voltages or 69 Vdc for 125
Vdc nominal voltages. See Table 12-1 for the control voltage ranges.
Table 12-1. Contact Sensing Turn-On Voltage
Nominal Turn-On Voltage Range
Nominal Control
Voltage
Jumper Installed
(Low Position)
Jumper Not Installed
(High Position)
24 Vdc N/A Approx. 5 Vdc
48/125 Vac or Vdc 26 - 38 Vac or Vdc 69 - 100 Vac or Vdc
125/250 Vac or Vdc 69 - 100 Vac or Vdc 138 - 200 Vac or Vdc
Each BE1-951 is delivered without the contact sensing jumpers installed for operation in the higher end of
the control voltage range. If the contact sensing inputs are to be operated at the lower end of the control
voltage range, the jumpers must be installed.
The following describes how to locate and remove/change the contact sensing input jumpers:
1. Remove the draw-out assembly by loosening the two thumbscrews and pulling the assembly out
of the case. Observe all electrostatic discharge (ESD) precautions when handing the draw-out
assemble.
2. Locate the two jumper blocks that are mounted on the Digital Circuit Board. The Digital Circuit
Board is the middle board in the assembly and the jumper terminal blocks are located on the
component side of the circuit board. Each terminal block has two sets of pins. With the jumper as
installed at the factory, one pin should be visible when viewed from the side of the unit. This
configuration allows the inputs to Operate at the higher end of the control voltage range. Figure
12-1 illustrates the location of the jumper terminal blocks as well as the position of a jumper
placed in the high voltage position.
ATTENTION
The BE1-951 relay comes shipped with the input jumpers removed. Read the
following paragraphs closely before placing the relay in service.
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