Watlow EZ-ZONE PM - Manual (Page 26)

Watlow EZ-ZONE ® PM Limit Controller • 23 • 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.
Output 2 Mechanical Relay, Form A
Mechanical Relay
(Output 2)
common
normally open
L1
K1
J1
L2
K2
T1
S1
R1
Slot A • 5 A at 240VÅ (ac) or 30VÎ (dc)
maximum resistive load
• 20 mA at 24V minimum load
• 125 VA pilot duty @ 120/240VÅ
(ac), 25 VA at 24VÅ (ac)
• 100,000 cycles at rated load
• Output does not supply power.
• for use with ac or dc
See Quencharc note.
PM _ _ _ _ [J]-_ _ _ _ AAA
L_
K_
Output 3 Switched DC/Open Collector
dc +
common
X3
W3
Y3
L4
K4
T2
S2
R2
Slot B
dc - (open collector)
Switched DC
• 30 mA dc maximum supply
current
• short circuit limited to <50 mA
• 22 to 32VÎ (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
• 30VÎ (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 common to the power sup-
ply negative.
See Quencharc note.
PM _ _ _ _ _-_ _ [C] _ AAA
Switched DC
common
24V
X_
dc +
dc -
W_
Y_
Open Collector
Load
Power Supply
dc -
common
24V
X_
W_
Y_
Output 3 Mechanical Relay, Form C
Mechanical Relay
(Output 3)
normally open
normally closed
common
L3
K3
J3
L4
K4
T2
S2
R2
Slot B
• 5 A at 240VÅ (ac) or 30VÎ (dc)
maximum resistive load
• 20 mA at 24V minimum load
• 125 VA pilot duty at 120/240VÅ
(ac), 25 VA at 24VÅ (ac)
• 100,000 cycles at rated load
• Output does not supply power.
• for use with ac or dc
See Quencharc note.
PM _ _ _ _ _-_ _ [E] _ AAA
normally open
common
normally closed
L _
K _
J _
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 .