Watlow EZ-ZONE
®
PM PID Controller
•
17
•
Chapter 2 Install and Wire
Óç
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 mm2 (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 .
Digital Output 5, 6
98
99
CF
CD
CE
B5
D6
D5
Slot C
Digital Output
• Update rate 10 Hz
• Output voltage 24V
• Current limit, Output 5, 24
mA maximum
• Current limit, Output 6,
10 mA maximum driving
single pole DIN-A-MITE
• Capable of driving a 3-pole
DIN-A-MITE
• Open-circuit voltage 22 to
32V
Î
(dc)
PM _ _
[2,4]
_ _-_ _ _ _ _ _ _
B
24 Vdc
common
D
_
_
Output 1 Switched DC/Open Collector
dc - (open collector)
dc +
common
X1
W1
Y1
Slot A
Switched DC
• 30 mA dc maximum supply cur
-
rent
• short circuit limited to <50 mA
• 22 to 32V
Î
(dc) open circuit
voltage
• Use dc- and dc+ to drive exter
-
nal solid-state relay.
• DIN-A-MITE compatible
• single-pole: up to 4 in parallel or
4 in series
• 2-pole: up to 2 in parallel or 2 in
series
• 3-pole: up to 2 in series
Open Collector
• 100 mA maximum output cur
-
rent sink
• 30V
Î
(dc) maximum supply
voltage
• Any switched dc output can use
the common terminal.
• Use an external power supply to
control a dc load, with the load
positive to the positive of the
power supply, the load negative
to the open collector and com-
mon to the power supply nega-
tive.
See Quencharc note.
PM _ _ _
[C]
_-_ AAAA _ _
Switched DC
dc +
dc -
common
X_
Y_
W_
24V
Open Collector
Load
Power Supply
dc -
common
X_
Y_
W_
24V
Output 1 Mechanical Relay, Form C
normally open
normally closed
common
L1
K1
J1
Slot A
• 5 A at 240V
Å
(ac) or 30V
Î
(dc)
maximum resistive load
• 20 mA at 24V minimum load
• 125 VA pilot duty at 120/240V
Å
(ac), 25 VA at 24V
Å
(ac)
• 100,000 cycles at rated load
• Output does not supply power.
• for use with ac or dc
See Quencharc note.
PM _ _ _
[E]
_-_ AAAA _ _
J
normally open
common
normally closed
L
K
_
_
_
Quencharc Note:
Switching pilot duty inductive
loads (relay coils, solenoids,
etc .) with the mechanical
relay, solid state relay or
open collector output options
requires use of an R .C . sup-
pressor .
