User`s manual
Wa tlow EZ-ZONE
®
ST • 9 • Chapter 2 Install and Wire
–
+
–
+
–
+
S1 S2
S3
S1
S3
–
+
Thermocouple
(Input 2)
Process
0 to 20 mA
(Input 2)
N.O. (Output 3)
N.C. (Output 3)
common (Output 3)
N.O. (Output 4)
contactor (Coil 1)
Contactor
Coil 1
Contactor
Coil 2
S
T_ B - _ _ _ _ - _ _ _ _
(
no limit
)
ST_ L - _ _ _ _ - _ _ _ _ (with limit)
common (RUI)
T-/R- (RUI)
T+/R+ (RUI)
- common (Digital I/O)
+ Digital Input 6 or Output 6
+ Digital Input 5 or Output 5
ST_ _ - _ _ A _ - _ _ _ _
Remote User Interface (RUI)
common (Modbus RTU)
T-/R- (Modbus RTU)
T+/R+ (Modbus RTU)
- common (Digital I/O)
+ Digital Input 6 or Output 6
+ Digital Input 5 or Output 5
ST_ _ - _ _ M _ - _ _ _ _
Modbus RT
U
on EIA-4
85
Limit
Address
Selection
fuse
load
S1 S2
S3
+
–
S1
S3
2-wire
RTD
(Input 1)
3-wire
RTD
(Input 1)
Thermocouple
(Input 1)
Process
0 to 20 mA
(Input 1)
Process
0 to 10VÎ (dc)
0 to 50mVÎ (dc)
(Input 1)
N.O.
(Output 2)
common
(Output 2)
Controller
–
+
2-wire
RTD
(Input 2)
3-wire
RTD
(Input 2)
98
99
CF
CD
CE
B5
D6
D5
L2
K2
T1
S1
R1
L2
K2
T1
S1
R1
98
99
CC
CA
CB
B5
D6
D5
1 2 3 4
ON
L3
K3
J3
A1
L4
T2
S2
R2
L2
K2
T1
S1
R1
L2
K2
T1
S1
R1
L2
K2
T1
S1
R1
L2
K2
T1
S1
R1
L3
K3
J3
A1
L4
T2
S2
R2
L3
K3
J3
A1
L4
T2
S2
R2
L3
K3
J3
A1
L4
T2
S2
R2
L3
K3
J3
A1
L4
T2
S2
R2
neutral
hot
fuse
fuse
earth
ground
1
6
3
4
A1
A2
2 5
EZ-ZONE™ ST
Patent Pending
Integrated
Control Loop
1 2 3 4
ON
LIMIT
OUT 3
SSR
STATUS
OUT 2
LIMIT
OUT 3
SSR
STATUS
OUT 2
hot
hot
Process
0 to 10VÎ (dc)
0 to 50mVÎ (dc)
(Input 2)
Power Supply
Power Supply
fuse
fuse
Output 1 (SSR)
Wiring
with a contactor (ST _ _ - (B or F) _ _ _ - _ _ _ _)
Ó
WARNING: Use National Electric
(NEC) or other country-specific
standard wiring and safety prac-
tices 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 equip-
ment and property, and/or injury
or loss of life.
ç
WARNING: If high voltage is applied to a
low-voltage controller, irreversible damage
will occur.
Note:
Terminals L4 and A1 on the limit connector
are jumpered at the factory to complete the
contactor circuit. Additional switches may
be wired in series to the terminals.
Note:
Use the contactor with a minimum load of
100 watts.
STATUS Indicator Light
Flashing green indicates the controller is run-
ning with no input errors.
Flashing red indicates an input error.
No flashing indicates that the controller is not
functioning.
CAUTION: Always mount the controller as
shown, with the heat-sink fins aligned verti-
cally.
Note:
The control common terminal and the digital
common terminal are referenced to different
voltages and must remain isolated.
Note:
A2 is connected internally to terminal 98.
A1 is connected internally to the contac-
tor coil. The other side of the coil is con-
nected to terminal 99.