Watlow Integrated Controller User Manual Rev C EZ-ZONE PM User Manual page 24

Ó
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.
Note:
Maximum wire size termina-
tion and torque rating:
• 0.0507 to 3.30 mm 2 (30 to
12 AWG) single-wire termi-
nation or two 1.31 mm 2 (16
AWG)
• 0.8 Nm (7.0 lb.-in.) torque
Note:
Adjacent terminals may be
labeled differently, depend-
ing on the model number.
Note:
To prevent damage to the
controller, do not connect
wires to unused terminals.
Note:
Maintain electrical isolation
between analog input 1, digi-
tal input-outputs, switched
dc/open collector outputs and
process outputs to prevent
ground loops.
Note:
The control output common
terminal and the digital com-
mon terminal are referenced
to different voltages and
must remain isolated.
Note:
Avoid continuous writes
within loops. Excessive
writes to EEPROM will cause
premature EEPROM failure.
The EEPROM is rated for
1,000,000 writes.
®
Wat lo w EZ-ZO NE P M I n te g r at e d C o n tr o lle r
Standard Bus EIA-485 Communications
• Wire T-/R- to the A terminal of
Slot C
the EIA-485 port.
98
• Wire T+/R+ to the B terminal of
99 the EIA-485 port.
• Wire common to the common
common
CF
terminal of the EIA-485 port.
T-/R-
CD
• Do not route network wires
T+/R+
with power wires. Connect net-
CE
work wires in daisy-chain fash-
B5
ion when connecting multiple
devices in a network.
D6
D5
Modbus RTU or Standard Bus EIA-485 Communications
• Wire T-/R- to the A terminal of
the EIA-485 port.
Slot C
• Wire T+/R+ to the B terminal of
98
the EIA-485 port.
• Wire common to the common
99
terminal of the EIA-485 port.
common
CC
• Do not route network wires
T-/R-
with power wires. Connect net-
CA
work wires in daisy-chain fash-
T+/R+
CB
ion when connecting multiple
devices in a network.
B5
• A termination resistor may be
D6
required. Place a 120 Ω resistor
across T+/R+ and T-/R- of last
D5
controller on network.
EIA-232/485 Modbus RTU Communications
Slot B
485 T+/R+
CB
485 T-/R-
CA
485 common
CC
485 T+/R+
CB
485 T-/R-
CA
232 common
C5
232 (TX) to DB9 pin 2 (RD)
C3
232 (RD) to DB9 pin 3 (TX)
C2
Modbus-IDA EIA/TIA-485
Terminal Name
DO A
D1 B
common common
•
• 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.
Watlow Termi- Function
nal Label
CA or CD T-/R-
CB or CE T+/R+
CC or CF common
22
•
• 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
PM6 _ _ _ _-(A, 2 or 3) _ _ _ A _ _
• 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
Standard Bus network.
• Maximum number of EZ-
®
ZONE controllers on a Modbus
network is 247.
• maximum network length:
1,200 meters (4,000 feet)
• 1/8th unit load on EIA-485 bus.
PM6 _ _ _ _-1 _ _ _ A _ _
• Do not connect more than
®
one EZ-ZONE PM control-
ler 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
Modbus 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.
PM6 _ _ _ _-2 AAA A _ _
C hapter 2 In stal l an d W ir e