Profibus dp communications, Profibus dp led indicators, Closest to the front – Watlow EZ-ZONE PM Integrated Controller User Manual

Page 42

Watlow EZ-ZONE

PM Integrated Controller

•

Chapter 2 Install and Wire

Warning:

Óç

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 electrical sensors or

peripheral devices. Failure to do so

may result in damage to equipment

and property, and/or injury or loss
of life.

Note:

Maximum wire size termination and

torque rating:

• 0.0507 to 3.30 mm

(30 to 12

AWG) single-wire termination or

two 1.31 mm

(16 AWG)

• 0.8 Nm (7.0 lb.-in.) torque

Note:

Adjacent terminals may be labeled

differently, depending on the model

number.

Note:

To prevent damage to the control-

ler, do not connect wires to unused
terminals.

Note:

Maintain electrical isolation between

analog input 1, digital input-outputs,

switched dc/open collector outputs

and process outputs to prevent
ground loops.

Note:

The control output common termi-

nal and the digital common terminal

are referenced to different voltages

and must remain isolated.

Note:

This Equipment is suitable for use in

CLASS I, DIVISION 2, Groups A, B,

C and D or Non-Hazardous locations
only. Temperature Code T4A

Warning:

Explosion Hazard - Dry contact clo-

sure Digital Inputs shall not be used

in Class I Division 2 Hazardous Loca-

tions unless switch used is approved
for this application.

Warning:

Explosion Hazard – Substitution of

component may impair suitability

for CLASS I, DIVISION 2.

Warning:

Explosion Hazard - Do not discon-

nect while the circuit is live or

unless the area is known to be free

of ignitable concentrations of flam-

mable substances.

Green

The device is operating normally.

Profibus DP Communications

485 T-/R-

+5Vdc Voltage Potential

B
A

trB

B
A

trA

Slot B & E

485 T+/R+

Digital ground

Termination resistor B

485 T+/R+

485 T-/R-

Termination resistor A

• Wire T-/R- to the A termi-

nal of the EIA-485 port.

• Wire T+/R+ to the B termi-

nal of the EIA-485 port.

• Wire Digital Ground 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 con-

necting multiple devices in

a network.

• A termination resistor

should be used if this con-

trol is the last one on the

network.

• If using a 150 Ω cable Wat-

low provides internal termi-

nation. Place a jumper

across pins trB and B and

trA and A.

• If external termination is

to be used with a 150 Ω

cable place a 390 Ω resis-

tor across pins VP and B, a

220 Ω resistor across pins

B and A, and lastly, place a

390 Ω resistor across pins

DG and A.

• Do not connect more than

32 EZ-ZONE

PM control-

lers on any given segment.

• Maximum EIA-485 network

length: 1,200 meters (4,000

feet)

• 1/8th unit load on EIA-485

bus.

• Communications instance 2
Slot B: PM [6] _ _ _ _-[6] _ _

_ _ _ _

Slot E: PM [4, 8, 9] _ _ _ _-[6]

_ _ _ _ _ _

Profibus Terminal

EIA/TIA-485 Name

Watlow Terminal

Label

Function

VP (Voltage Potential)

- - - -

+5Vdc

B-Line

T+/R+

A-Line

T-/R-

DP-GND

common

Profibus DP LED Indicators

Viewing the unit from the front and then looking on top of the controller two

bi-color LEDs can be seen where only the front one is used. Definition follows:

Closest to the Front

Indicator LED

Description

Red

Profibus network not detected

Red

Flashing

Indicates that the Profibus card is waiting for data

exchange.

Green

Data exchange mode