Emerson operation manual 1 E2 Main Processor Board 3 E2 Keypad, PIB LEDs Status

2.1.1 E2 Main Processor Board	2.1.3 E2 Keypad
(CPU)

Figure 2-2- E2 CPU (RX-100 Version Shown)

The E2 CPU or main processor board (Figure 2-2) contains the CPU, Ethernet port, and memory used for log- ging. The 3.6V battery for the E2 is located on this board and protects log and alarm data during power loss. The main processor board connects to the PIB via a ribbon cable. The RX- and CX-100 versions support mono- chrome display only. For optimum viewing, backlight and contrast adjusts are available for customizing the mono- chrome display depending on the user’s needs.

2.1.2E2 Processor Interface Board

(PIB)

Figure 2-3 - E2 PIB

The E2 Processor Interface Board (PIB) interfaces the power and most all communications with the main proces- sor board, and contains all field wiring connections. The PIB allows you to connect an external keyboard, accessory cards, and an external computer. All RS485 and Echelon Network connectors are located on the PIB.

Figure 2-4- E2 Keyboard

The E2 has a QWERTY style keyboard layout with two rows of function keys. The first row (-) is comprised of screen-specific function keys, and the sec- ond row has designated icon keys. The five icon keys are Help , Alarms , Home , Menu , and Back .

2.1.4LEDs

The PIB, main processor board, and keyboard (located behind the main board) LEDs can be used to determine the status of normal operating parameters for the unit.

PIB LEDs	Status
Green (14)	ON: Power is being applied to the
	PIB
Yellow (RX1)	ON: Communication is being re-
	ceived on RS485 Port 1A
Yellow (RX2)	ON: Communication is being re-
	ceived on RS485 Port 1B
Red (TX)	ON: Communication is being sent
	on RS485 Port 1A and 1B

Table 2-2- PIB LED’s Status

2-2 • E2 RX/BX/CX I&O Manual 026-1610 Rev 13 14-SEP-2011