Watlow EZ-ZONE
®
PM Integrated Controller
•
27
•
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 between
analog input 1, digital input-outputs,
switched dc/open collector outputs
and process outputs to prevent
ground loops.
Note:
The control output common termi-
nal and the digital common terminal
are referenced to different voltages
and must remain isolated.
Note:
This Equipment is suitable for use in
CLASS I, DIVISION 2, Groups A, B,
C and D or Non-Hazardous locations
only. Temperature Code T4A
Warning:
ç
Explosion Hazard - Dry contact clo-
sure Digital Inputs shall not be used
in Class I Division 2 Hazardous Loca-
tions unless switch used is approved
for this application.
Warning:
ç
Explosion Hazard – Substitution of
component may impair suitability
for CLASS I, DIVISION 2.
Warning:
ç
Explosion Hazard - Do not discon-
nect while the circuit is live or
unless the area is known to be free
of ignitable concentrations of flam
-
mable substances.
Input 1, 2 Process
-
+
S_
R_
volts
Slot A, B
-
+
T_
S_
amperes
Slot A, B
• 0 to 20 mA @ 100 Ω input impedance
• 0 to 10V
Î
(dc) @ 20 kΩ input impedance
• 0 to 50 mV
Î
(dc) @ 20 kΩ input impedance
• scalable
Input 1: PM _
[C,R,B
*
]
_ _ _ - _ _ _ _ _ _ _ (-S1/+R1),(+T1/-S1)
Input 2: PM _ _ _ _ _ - _
[C,R,L]
_ _ _ _ _ (-S2/+R2),(+T2/-S2)
*
PM(4, 8 and 9) only
Input 1,2 Potentiometer
S_
R_
Slot A, B
CW
CCW
• Use a 1 kΩ potentiometer.
Input 1: PM _
[C,R,B
*
]
_ _ _ - _ _ _ _ _ _ _ (S1/R1)
Input 2: PM _ _ _ _ _ - _
[C,R,L]
_ _ _ _ _ (S2/R2)
*
PM(4, 8 and 9) only
Input 1, 2 Thermistor
S_
R_
Slot A, B
• >20 MΩ input impedance
• 3 microampere open-sensor detection
Input 1: PM _
[J,N,E]
_ _ _ _-_ _ _ _ _ _ _ (S1/R1)
Input 2: PM _ _ _ _ _ - _
[J,P,M]
_ _ _ _ _ (S2/R2)
Input 2 Current Transformer
current transformer
(input 2)
T2
S2
Slot B
• Input range is 0 to 50 mA.
• current transformer part number: 16-0246
• 100 Ω input impedance
• response time: 1 second maximum
• ac/-1 mA typical
PM _ _ _ _ _ - _
[T]
_ _ _ _ _
Note:
For input 1, option E is available with PM4, 8
and 9 models only.