Lochinvar 000 through 2, 1 warranty Interfacing Multiple Appliances, Table W

INTERFACING MULTIPLE

APPLIANCES

PARALLEL CONNECTION

FIG. 59 E-Bus Connection to Controls

Connection between multiple Intelli-Finappliances is accomplished via an E-Bus connection. An E-Bus terminal is provided on the rear of each appliance. The minimum specification for the communication wire is for a Level IV,

22AWG (0.034 mm2) plenum or non-plenum rated (as applicable), unshielded, twisted pair, stranded wire. Use plenum rated wire where required. See “Wire Requirements” for a listing of manufacturers who supply communication wire meeting this specification. The twisted pair wire is used to make daisy chain connections between the E-Bus terminals on multiple appliances. The E-Bus connection uses a Free Topology Transceiver (FTT) to support a polarity-insensitive free topology wiring scheme for

star, loop and/or bus wiring. The maximum number of nodes per segment is 60. The maximum number of nodes in a two-segment FTT network is 120, when using a repeater between the two segments. Consult factory for additional information on interface wiring of multiple Intelli-Finappliances connected to an EMS.

FTT networks are flexible and convenient to install and maintain. However, it is imperative to plan the network layout and to create and maintain accurate documentation. Careful planning and up to date documentation facilitates compliance verification and future FTT network expansion. It also minimizes unknown or inaccurate wire run lengths, node to node (device to device) distances, node counts, total wire length, inaccurate repeater locations, and misplaced or missing terminations.

Wire to the terminal blocks as follows:

NOTE:

When attaching two or more wires to the same terminal, twist wires together (see Fig. 60). Deviation from this rule can result in improper electrical contact.

TABLE - W

Daisy-Chain Doubly Terminated FTT Network Bus Topology Specifications

	Maximum FTT network Bus length	Maximum node-to-node length
Wire/Cable Type	for segment(s) in feet (meters)	for segment(s) in feet (meters)
__________________________________	_________________________________	___________________________________
	_
Level IV 22 AWG unshielded, twisted		3773 (1150)
pair, stranded communications wire (use	4593 (1400)
plenum rated wire where required)

TABLE - X

Singly Terminated FTT Network Bus Topology Specifications

	Maximum FTT network Bus length	Maximum node-to-node length
Wire/Cable Type	for segment(s) in feet (meters)	for segment(s) in feet (meters)
__________________________________	_________________________________	___________________________________
	_
Level IV 22 AWG unshielded, twisted		1312 (400)
pair, stranded communications wire (use	1640 (500)
plenum rated wire where required)

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