Watlow EZ-ZONE PM - Manual (Page 34)

Watlow EZ-ZONE ® PM Limit Controller • 31 • 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 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 be-
tween Analog Input 1, Digital I/O,
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.
Wiring a Serial EIA-485 Network
Do not route network wires with pow-
er wires. Connect network wires in
daisy-chain fashion when connecting
multiple devices in a network.
A termination resistor may be re-
quired. Place a 120 Ω resistor across
T+/R+ and T-/R- of the last controller
on a network.
Only one protocol per port is avail-
able at a time: either Modbus RTU or
Standard Bus.
- A
+ B
com
98
99
CC
CA
CB
B5
D6
D5
power
- A
+ B
common
power
-
A
+
B
common
power
power
power
power
EZ-ZONE PM
EZ-ZONE ST
ST_ _ - (B or F) _ M _ -_ _ _ _
PLC
98 99 CC CA CB B5 D6 D5
Power
Supply
fuse
EZ-ZONE RM
98 99
Slot C
powe
r
CZ CB CX CY CA CC
- A
+ B
common
- A
+ B
com
- A
+ B
common
power
-
A
+
B
common
power
power
power
EZ-ZONE PM
EZ-ZONE ST
ST_ _ - (B or F) _ M _ -_ _ _ _
98 99 CF CD CE B5 D6 D5
Power
Supply
fuse
EZ-ZONE RM
98 99
Slot C
power
CZ CE CX CY CD CF
- A
+ B
common
98
99
CF
CD
CE
B5
D6
D5
98
99
CF
CD
CE
RUI/Gateway
EZKB-_ A _ _- _ _ _ _
A network using Watlow's Standard Bus and an RUI/Gateway .
A network with all devices configured using Modbus RTU .