Emerson E2 I/O Network Boards and Peripherals, Gateway Board, Main Board Status CPU LEDs

Main Board	Status
(CPU) LEDs
Green	1 blink every two seconds (1 second
(D1 General	ON, 1 second OFF): Main board is
Status LED for	operating normally.
E2 and Blank	Solid ON: E2 is booting up.
Face E2)	Faster blinks per second: Indicates an
	error condition with the hardware or
	firmware.
Green	ON: E2 is booting up.
(D18 Boot Sta-
tus LED)
Table 2-3- Main Board (CPU) LED’s Status
Keyboard	Status
LED
Green (D5	1 blink every two seconds (1 second
General Status	ON, 1 second OFF): Status is nor-
LED)	mal.
	4 blinks per second: A flash and/or
	crystal problem has been detected.
	Board should be replaced.

Table 2-4- Keyboard LED’s Status

2.2I/O Network Boards and Peripherals

2.2.1The Gateway Board

Figure 2-5- Gateway Board

The Gateway board is an RS485 to RS485 converter. One side of the Gateway is always connected to the Emer- son Retail Solutions I/O Network. The other side of the Gateway is the receiver bus (RS485). The receiver bus is connected to one or more RS485 devices depending on which type of Gateway is being used. The Gateway inter- faces devices to the Einstein/E2 and legacy Emerson Retail Solutions controller (REFLECS) by simulating 16AI and 8RO boards using Emerson Retail Solutions standard I/O board protocol. The Gateway can also con- vert third-party controller protocols to Emerson Retail Solutions protocol for custom cells created in the Einstein/ E2 to interface with third-party controllers (Danfoss, Woodley, etc.).

The Gateway performs one of two basic functions:

1.It allows control of and/or status of a device using I/O board simulation

2.Converts a third-party protocol to Emerson Retail Solutions I/O Net protocol and interfaces to a

I/O Network Boards and Peripherals Hardware Overview • 2-3