Instruction Manual

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
20100
-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
Safe 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.