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2.4.1.2 Contrast Knob
The CONTRAST knob adjusts the LCD display contrast for user’s optimum viewing. The LCD will appear
blank if knob while being completely clockwise and solid black if it is fully counterclockwise.
2.4.1.3 Keypad
The controller unit includes a 28 keys keypad to allow user for navigating and entering values to the
contents of the LCD menus.
The keys are identified as: ESC (escape), NEXT, ENT (enter), YES, NO, ARROW DOWN, ARROW UP,
ARROW RIGHT, ARROW LEFT; numbers 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0; and letters A, B, C, D, E and F.
These keys allow the user to navigate thru the content of the LCD menus, confirm status, modify timing
parameters, setting date and time, configuring serial ports and all other interaction with the traffic
application.
2.4.1.4 Ethernet Ports
There are two Ethernet ports available on the front panel.
Port 1 is a 10/100 Base-T Ethernet switch with three RJ-45 jack connectors which can be used to handle
traffic applications needs, such us configuration, databases, etc.
Port 2 is a 10/100 Base-T Ethernet port with one RJ-45 jack connector; this port is intended to be used for
accessing to the controller’s operating system.
Each jack has two LED indicators to show the LINK ACT and 10-100 TX status.
2.4.1.5 USB Ports
Four hot-swappable USB connectors are located on front panel to allow the controller support the use of
USB memory devices for transferring data files from and to the controller; these data files can be firmware
upgrades, databases, etc.
2.4.1.6 SDLC Port, SP-3
It is located on front panel as a DB-15 female connector with latching blocks and it is labeled as
“SDLC”.
This port uses an SDLC communication protocol and four (Tx, Rx, TxClk and RxClk) EIA-485 differential
serial communications interfaces with a default speed of 153.6 Kbps in order to meet NEMA TS2-1998
specification.
The port has a software selectable speed of 19.2Kbps, 38.4Kbps, 57.6Kbps, 76.8Kbps, 115.2Kbps,
153.6Kbps and 614.4Kbps.
This port has a dedicated pin to disable all port communication when desirable; this is accomplished by
mating a connector to this port, in which pin 8 and pin 10 are connected (0VDC = Disabled).
This port is primarily dedicated to synchronous communications in a TS2 NEMA cabinet (BIU’s, MMU).
This port is connected to cabinet’s serial bus NEMA cabinet. The connection to the cabinet is thru a
SDLC communications cable connected to the SDLC port at one end and to the termination board on the
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