BASLER ELECTRIC 149D956G02 / 149D956G02
BASLER ELECTRIC 149D956G02 / 149D956G02
BESTlogic™ Programmable Logic
Each BE1-951 protection and control function is implemented in an independent function element. Every
function block is equivalent to its single function, discrete device counterpart so it is immediately familiar
to the protection engineer. Each independent function block has all of the inputs and outputs that the
discrete component counterpart might have. Programming with BESTlogic is equivalent to choosing the
devices required by your protection and control scheme and then drawing schematic diagrams to connect
the inputs and outputs to obtain the desired operating logic.
Several preprogrammed logic schemes and a set of custom logic settings are provided. A
preprogrammed scheme can be activated by merely selecting it. Custom logic settings allow you to tailor
the relay functionality to match the needs of your operation’s practices and power system requirements.
Write Access Security
Security can be defined for three distinct functional access areas: Settings, Reports, and Control. Each
access area can be assigned its own password. A global password provides access to all three functional
areas. Each of the four passwords can be unique or multiple access areas can share the same password.
A second dimension of security is provided by allowing the user to restrict access for any of the access
areas to only specific communication ports. For example, you could set up security to deny access to
control commands from the Ethernet port that is connected through a modem to a telephone line.
Security settings only affect write access. Read access is always available in any area through any port.
Human-Machine Interface (HMI)
Each BE1-951 comes with a front panel display with five LED indicators for Power Supply Status, Relay
Trouble Alarm, Minor Alarm, Major Alarm, and Trip. The lighted, liquid crystal display (LCD) allows the
relay to replace local indication and control functions such as panel metering, alarm annunciation, and
control switches. Four scrolling pushbuttons on the front panel provide a means to navigate through the
menu tree. Edit and Reset pushbuttons provide access to change parameters and reset targets, alarms
and other registers. In Edit mode, the scrolling pushbuttons provide data entry selections. Edit mode is
indicated by an LED on the Edit pushbutton.
The LCD has automatic priority logic to govern what is being displayed on the screen so that when an
operator approaches, the information of most interest is automatically displayed without having to
navigate the menu structure. The order of priorities is:
1. Recloser active
2. Targets
3. Alarms
4. Programmable automatic scrolling list
Up to 16 screens can be defined in the programmable, automatic scroll list.
Communication
Three independent, isolated communication ports provide access to all functions in the relay. COM 0 is a
9-pin RS-232 port located on the front of the case. COM 1 is located on the rear of the case and may be
ordered as an Ethernet or RS-232 port. COM 2 is a two wire RS-485 port located on the back of the case.
The optional rear Ethernet or RS-232 port is referred as COM 1 in the BESTCOMS™ General Operation
screen, Security tab.
An ASCII command interface allows easy interaction with the relay, using standard, off the shelf
communication software. The ASCII command interface is optimized to allow automation of the relay
setting process. Settings files can be captured from the relay and edited using any software that supports
the *.txt file format. These ASCII text files can then be used to set the relay using the send text file
function of your communication software.
ASCII, Modbus™, and DNP3 protocols are optionally available for the RS-485 communication port. A
separate instruction manual is available for each available protocol. Consult the product bulletin or the
factory for availability of these options and instruction manuals.
Ethernet information can be found in Section 15. BESTnet™ Communication.
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