Watlow EZ-ZONE ST User Manual
Page 12
Watlow EZ-ZONE
®
ST
•
10
•
Chapter 2 Install and Wire
-
-
+
-
+
+
-
+
-
+
1 2 3 4
ON
RTD
(Input 2)
2-wire
3-wire
Thermocouple
(Input 2)
N.O. (Output 3)
N.C. (Output 3)
common (Output 3)
N.O. (Output 4)
contactor (Coil 1)
ST_ L - _ _ _ _ - _ _ _ _
all
T-/R- (RUI)
T+/R+ (RUI)
common (RUI)
- common (Digital I/O)
+ Digital Input 6 or Output 6
+ Digital Input 5 or Output 5
ST_ _ - _ _ A _ - _ _ _ _
Remote User Interface
(RUI)
T-/R- (Modbus RTU)
T+/R+ (Modbus RTU)
common (Modbus RTU)
- common (Digital I/O)
+ Digital Input 6 or Output 6
+ Digital Input 5 or Output 5
ST_ _ - _ _ M _ - _ _ _ _
Modbus RTU on EIA-485
Limit
Power
Control
Address
Selection
load
-
S1
S2
S3
+
S1
S3
2-wire
3-wire
Thermocouple
(Input 1)
Process
0 to 20 mA
(Input 1)
Process
0 to 10V
Î (dc)
0 to 50mV
Î (dc)
(Input 1)
N.O. (Output 2)
common (Output 2)
Controller
RTD
(Input 1)
hot
neutral
fuse
98
99
CF
CD
CE
B5
D6
D5
L2
K2
T1
S1
R1
98
99
CC
CA
CB
B5
D6
D5
L2
K2
T1
S1
R1
L3
K3
J3
A1
L4
T2
S2
R2
L2
K2
T1
S1
R1
L2
K2
T1
S1
R1
L2
K2
T1
S1
R1
S1
S2
S3
L3
K3
J3
A1
L4
T2
S2
R2
L3
K3
J3
A1
L4
T2
S2
R2
S1
S3
L2
K2
T1
S1
R1
L3
K3
J3
A1
L4
T2
S2
R2
L3
K3
J3
A1
L4
T2
S2
R2
load
hot
hot
fuse
fuse
2
1
EZ-ZONE™ ST
Patent Pending
Integrated Control Loop
LIMIT
OUT 3
SSR
STATUS
OUT 2
Indicator
Lights
Process
0 to 10V
Î (dc)
0 to 50mV
Î (dc)
(Input 2)
Process
0 to 20 mA
(Input 2)
Power
Power
Power
Output 1 (SSR)
Output 1 (SSR)
Wiring
without a contactor (ST _ _ - A _ _ _ _ - _ _ _ _ )
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
electrical sensors or peripheral devices . Failure to do so
may result in damage to equipment and property, and/or
injury or loss of life .
ç
WARNING: If high voltage is applied to a low-voltage con-
troller, irreversible damage will occur .
CAUTION: Always mount the controller as shown, with the
heat-sink fins aligned vertically .
Note:
If 75A heat sink is ordered D6 (Digital Input) will be factory
set and used as the SSR over temperature shut-down .