Watlow ez-zone pm - EIA-232;485 Modbus RTU Communications; Modbus RTU or Standard Bus EIA-485 Communications; Standard Bus EIA-485 Communications

Watlow EZ-ZONE
®
PM Integrated Controller • 29 • 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 pe-
ripheral 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
2
(30 to 12 AWG)
single-wire termination or two 1.31
mm
2
(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 terminal
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:
ç
Explosion Hazard – Substitution of
component may impair suitability for
CLASS I, DIVISION 2.
Warning:
ç
Explosion Hazard - Do not disconnect
while the circuit is live or unless the
area is known to be free of ignitable
concentrations of flammable sub-
stances.
Standard Bus EIA-485 Communications
Standard Bus
EIA-485
T-/R-
common
98
99
CF
CD
CE
B5
D6
D5
Slot C
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 net-
work wires in daisy-chain fash-
ion when connecting multiple
devices in a network.
• A120Ωterminationresistor
may be required across T+/R+
and T-/R-, placed on the last
controller on the network.
• Donotconnectmorethan16
EZ-ZONE PM controllers on a
network.
• maximumnetworklength:
1,200 meters (4,000 feet)
• 1/8thunitloadonEIA-485bus
PM [4,6,8,9] _ _ _ _ - [*] _ _ _ _ _ _
* All models include Standard Bus
communications (instance 1)
Modbus RTU or Standard Bus EIA-485 Communications
Modbus RTU or
Standard Bus EIA-485
T-/R-
common
98
99
CC
CA
CB
B5
D6
D5
Slot C
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 net-
work wires in daisy-chain fash-
ion when connecting 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.
• Onlyoneprotocolperportis
available at a time: either Mod-
bus RTU or Standard Bus.
• Donotconnectmorethan16
EZ-ZONE controllers on a Stan-
dard Bus network.
• MaximumnumberofEZ-ZONE
controllers on a Modbus net-
work is 247.
• maximumnetworklength:
1,200 meters (4,000 feet)
• 1/8thunitloadonEIA-485bus.
Communications instance 1•
PM [4,6,8,9] _ _ _ _ - [1] _ _ _ _
_ _
EIA-232/485 Modbus RTU Communications
485 common
485 T+/R+
CB
CA
CC
CB
CA
C5
C3
C2
Slot B, E
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 PM controller
on an EIA-232 network.
• Donotconnectmorethan
16 EZ-ZONE controllers on
a Standard Bus EIA-485
network.
• MaximumnumberofEZ-
ZONE controllers on a Mod-
bus network is 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.
Communications instance 2•
Slot B
PM [6] _ _ _ _ - [2] _ _ _ _ _ _
Slot E
PM [4,8,9] _ _ _ _ - [2] _ _ _
_ _ _
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