Emerson E2 operation manual 8RO and 8ROSMT Relay Boards, Hand-held Terminal

• CCB and CC-100 case controllers

The HHT does not require a separate power source. The unit is powered from the RJ-11 connector on the peripheral equipment. The HHT includes a standard male RJ-11 to male RJ-11 cable.

NOTE: The 9V battery and 9-12V DC adapter connection are not used on this HHT model (P/N 814-3110).

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	13		3
	12		4
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	11
			6
	10
			7
			8
			9
	LEGEND
1	The power switch determines if the HHT is	8	Scrolls list selections and scrolls through
	in self-powered mode (BATT), ext power (EXT),		ASCII characters if in a text field
	or if powered from a target device (HOST)
2	External Power Connector (9-12 VDC)	9	RS-485 Connector
3	F2- Main Menu	10	Cancel - clears/erases text in editable field;
			cancels overrides
4	Up Arrow - moves to previous screen,	11	Down Arrow - moves to next screen,
	editable field, or top of screen		editable field, end of screen, or advances
5	Right Arrow - selects last editable field	12	Left Arrow - selects first editable field from
	starting from bottom of screen; selects		top of screen, and next editable field from
	last editable field from bottom to top		top to bottom
6	Enter - save into memory	13	F1 - Home Screen
7	Numeric keypad	14	LCD - four lines of 16 characters

Figure 2-10- Hand-held Terminal (814-3110)

2.2.5The 8RO and 8ROSMT Relay

Boards

The 8RO (P/N 810-3005)board is a general-purpose board used to connect an E2 to any of eight standard con- trol relay outputs, but is now obsolete and has been replaced by the 8ROSMT (P/N 810-3006)board.

To function, the 8RO board must be connected through either the Echelon Network or the RS485 I/O Network to the E2. When properly installed, the 8RO receives an elec- trical impulse from the E2, which either opens or closes any of eight contact relays. Output definitions within the E2 allow the user to configure the 8RO board to interact

with any refrigeration system or environmental control component.

The 8RO board is the direct link between the E2 and component operation. Information gathered by the con- troller from the input boards is checked against current stored setpoints. If differences in the received input data and the setpoint information are detected, a signal is either sent to the proper 8RO relay, or an existing signal is dis- continued. Through the use of this relay signal, control functions that can be properly maintained by a simple con- tact closure sequence are effectively operated by the E2.

The 8RO board is easily installed and operated within the Retail Solutions Network environment because of its straightforward design. Several of these features are shown in Figure 2-11.

Figure 2-11- 8RO Relay Output Board

Figure 2-12- 8ROSMT Relay Output Board

I/O Network Boards and Peripherals Hardware Overview • 2-9