Watlow EZ-ZONE RUI/Gateway Manual do Utilizador descarregar pdf (Página 9)

Warning:

Use National Electric (NEC)

or other country-specific

standard wiring and safety

practices when wiring and

connecting this controller to

a power source and to elec-

trical sensors or peripheral

devices. Failure to do so may

result in damage to equip-

ment and property, and/or

injury or loss of life.

Watlow EZ-ZONE

RUI/Gateway • 6 • Chapter 2 Install and Wire

Power

power

Slot C

long case

fuse

Power

power

Slot C

short case

fuse

• Minimum/Maximum Ratings

• 85 to 264VÅ (ac)

• 20.4 to 26.4 Vı (ac/dc)

• 47 to 63Hz

• 6VA maximum

Standard Bus EIA-485 Communications

Standard Bus

EIA-485

T-/R-

common

Slot C

long case

T+/R+

Standard Bus

EIA-485

T-/R-

common

Slot C

short case

T+/R+

• WireT-/R-totheAterminaloftheEIA-485port.

• WireT+/R+totheBterminaloftheEIA-485port.

• WirecommontothecommonterminaloftheEIA-485

port.

• Donotroutenetworkwireswithpowerwires.Connect

network wires in daisy-chain fashion when connecting

multiple devices in a network.

• Donotconnectmorethan16controllersonanetwork.

• maximumnetworklength:1,200meters(4,000feet)

• 1/8thunitloadonEIA-485bus

Note:

Disconnect any USB to EIA-485 converter when not

connected to a PC (without power). Failure to do so

may cause communications errors.

EIA-232/485 Modbus RTU Communications

485 common

485 T+/R+

Slot B

485 T-/R-

485 T+/R+

485 T-/R-

232 common

232 (TX) to DB9 pin 2 (RD)

232 (RD) to DB9 pin 3 (TX)

•WireT-/R-totheAterminal

of the EIA-485 port.

• WireT+/R+totheBtermi-

nal of the EIA-485 port.

• Wirecommontothecom-

mon terminal of the EIA-

485 port.

• Donotroutenetworkwires

with power wires. Connect

network wires in daisy-

chain fashion when connect-

ing multiple devices in a

network.

• Aterminationresistormay

be required. Place a 120 Ω

resistoracrossT+/R+and

T-/R- of last controller on

network.

• DonotwiretoboththeEIA-

485 and the EIA-232 pins at

the same time.

• TwoEIA-485terminalsof

T/R are provided to assist in

daisy-chain wiring.

• Donotconnectmorethan

one EZ-ZONE

RUI on a

EIA-232 network.

• MaximumnumberofEZ-

ZONE

RUI on a Modbus

RTU EIA-485 network: 247

• MaximumEIA-232network

length: 15 meters (50 feet)

• MaximumEIA-485network

length: 1,200 meters (4,000

feet)

• 1/8thunitloadonEIA-485

bus.

EZK _-_ 2 _ _-A _ A A

Modbus-IDA

Terminal

EIA/TIA-485

Name

Watlow Termi-

nal Label

Function

DO A CA or CD T-/R-

D1 B CB or CE T+/R+

common common CC or CF common

Note:

Disconnect any USB to EIA-485 converter when not connected to a PC

(without power). Failure to do so may cause communications errors.

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