Watlow EZ-ZONE PM - Manual (Page 27)

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.
Watlow EZ-ZONE ® PM Limit Controller • 24 • Chapter 2 Install and Wire
Output 3 Universal Process
Universal Process
(Output 3)
volts or current -
current +
volts +
F3
G3
H3
L4
K4
T2
S2
R2
Slot B
• 0 to 20 mA into 800 Ω maxi-
mum load
• 0 to 10VÎ (dc) into 1 kΩ mini-
mum load
• scalable
• output supplies power
• cannot use voltage and current
outputs at same time
• Output may be used as retrans-
mit or control.
PM _ _ _ _ _-_ _ [F] _ AAA
negative
volts +
current +
4 to 20 mA
0 to 10 V
F_
G_
H_
Output 3 Solid-State Relay, Form A
normally open
common
L3
K3
L4
K4
T2
S2
R2
Slot B
• 0.5 A at 20 to 264VÅ (ac) maxi-
mum resistive load
• 20 VA 120/240VÅ (ac) pilot duty
• opto-isolated, without contact
suppression
• maximum off state leakage of
105 microamperes
• output does not supply power
• Do not use on dc loads.
• See Quencharc note.
PM _ _ _ _ _ -_ _ [K] _ AAA
K_
L_
1.1
0
-20 50 40 30 20 10 0 -10 60 70
Amps RMS
Ambient Temperature ( o C)
0.1
1
0.2
0.9
0.3
0.4
0.5
0.6
0.7
0.8
1 Amp SSR Derating Curve
Sa
fe
Operating Area
Output 4 Switched DC
Mechanical Relay
(Output 4)
dc+
dc-
L3
K3
J3
W4
Y4
T2
S2
R2
Slot B
• 10 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 2 in series,
none in parallel
PM _ _ _ _ _-_ _ _ [C] AAA
common
24V
X_
dc +
dc -
W_
Y_
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. suppressor.