Watlow EZ-ZONE
®
ST
•
17
•
Chapter 2 Install and Wire
Digital Inputs & Outputs
5-6
Analog Input 1
Analog Input 2
Communications Ports
Controller
Low Voltage Power Bus
Mechanical Relay,
Solid-State Relay,
Outputs
Low-voltage Isolation: 42V peak
Safety Isolation: 2300V
Å
(ac)
Safety Isolation
No Isolation
No Isolation
Low-voltage
Isolation
Low-voltage
Isolation
Controller Power Supply
20 to 26V
Î
(
dc)
20 to 26V
Å
(ac)
85 to 264V
Å
(ac)
Safety Isolation
Safety Isolation
ST Isolation Block
1 2 3
4
ON
Control
Address
Selection
98
99
CF
CD
CE
B5
D6
D5
L2
K2
T1
S1
R1
L3
K3
J3
A1
L4
T2
S2
R2
2
1
EZ-ZONE™ ST
Patent Pending
Integrated Control Loop
LIMIT
OUT 3
SSR
STATUS
OUT 2
Limit:
Indicates that the controller is
in a limit state.
Output 3:
Indicates that output 3 is in
an on state.
Solid-State Relay:
Indicates that the solid-state
relay is in an on state.
Status:
Flashing green indicates the
controller is running with no
input errors.
Flashing red indicates an input
error.
No flashing indicates that the
controller is not functioning.
Output 2:
Indicates that output 2 is in an
on state.
Indicator Lights and Slot Identification
Slot A
Slot C
Slot B
