Emerson E2 RS485 Network and Hardware Setup, I/O Network, 1 I/O Board Names and Terminology

6The RS485 Network and Hardware Setup

Previous versions of E2 hardware and firmware before version 2.30F01 only supported one I/O network port, with an optional expansion card that could be used for connection to Copeland ISD compressors or IMC/Prodigy S-Bus rooftop unit controllers. Beginning with E2 version 2.30F01, E2s now have up to three RS485 network ports, each of which may be configured as an I/O network, IMC/ Prodigy, ISD, or ECT MODBUS port.

Section 5, Serial Configuration of this manual covers how to assign COM ports COM2, COM4, and COM6 to different RS485 network types. Section 6 (this section) explains the network types, the hardware that may be con- nected to each type, and how to configure the devices.

6.1The I/O Network

All boards and controllers manufactured by Emerson Retail Solutions for communication with E2 via RS485 are generally referred to as I/O boards, and the network they are connected to is referred to as the I/O network

(or I/O Net).

A COM port configured as I/O Net may connect with up to 127 I/O boards. This network is used by the E2 to read data from the input boards and to send commands to the analog and digital output boards. Some unit control- lers, such as CCB case controllers and MultiFlex RCBs, also communicate with the E2 via the I/O Network.

6.1.1I/O Board Names and Terminology

There are many input, relay output, analog output, and combination I/O boards available from Emerson Retail Solutions for use with the E2. However, separate from the various MultiFlex unit controller models, E2 only recog- nizes four different types of I/O boards: 16AI, 8RO, 4AO, and 8DO. All E2-compatible I/O boards communicate with E2 as if they are one or more of these types of boards.

In this manual and in the E2 interface, when you

encounter these board names, bear in mind that they are terms that represent many types of boards. Table 6-1describes all the actual boards or board components for each E2 “board type.”

Board	Max #	Translation	Boards That Match
Type			Board Type
16AI	16	Any I/O board that	•16AI (discontinued)
		has digital and ana-	•8IO (discontinued)
		log inputs. The	•MultiFlex 16
		inputs of a combi-
		nation I/O board	•The inputs on all Mul-
		(8IO or MultiFlex	tiFlex combo boards
		combo board) are	(88, 88AO, 168,
		by themselves	168AO, and 1616)
		treated as one	•All versions of the
		16AI.
			Gateway board (some
			versions behave like as
			multiple 16AIs)
8RO	31	Any I/O board with	•8RO
		relay outputs. The	•8ROSMT
		relay outputs of a	•The relay outputs on
		combination I/O
			all MultiFlex combo
		board (8IO or Mul-
		tiFlex combo	boards (88, 88AO,
			168, 168AO, and 1616
		board) are by
			(which behaves as two
		themselves treated
			8RO boards)
		as one 8RO.
			•8IO (discontinued)
4AO	16	Any I/O board with	•4AO
		analog outputs.	•8IO (discontinued)
		The analog out-
			•The analog outputs on
		puts of a combina-
		tion I/O board (8IO	the MultiFlex 88AO
		or MultiFlex	and 168AO
		combo board) are
		by themselves
		treated as one
		8RO.
8DO	16	Any I/O board with	•8DO (including all
		+12VDC digital	versions of the
		pulse outputs.	PMAC and PMAC
			II anti-sweat control-
			ler)
			•Digital outputs on the
			MultiFlex 168DO
ARTC/	32	Rooftop HVAC	MultiFlex RTU and
RTU		controller board	ARTC (discontinued)

Table 6-1- Board Types and Boards Included in Each Type

The I/O Network The RS485 Network and Hardware Setup • 6-1