BASLER ELECTRIC BE1-51/27CA1EZ10A0N0F / BE15127CA1EZ10A0N0F

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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