Watlow Electric Integrated Controller User Manual Rev C EZ-ZONE PM - Manual (Page 16)

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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 mm2 (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.
Wa t l o w E Z - Z O N E ® P M I n t e g r a t e d C o n t r o l l e r • 1 4 • C h a p t e r 2 I n s t a l l a n d W i r e
Input 1 Thermocouple
-
+
L1
K1
J1
L2
K2
T1
S1
R1
Slot A
• 20 Ω maximum source resistance
• >20 MΩ input impedance
• 3 microampere open-sensor detection
• Thermocouples are polarity sensitive. The negative lead (usually
red) must be connected to S1.
• To reduce errors, the extension wire for thermocouples must be
of the same alloy as the thermocouple.
PM6 _ _ _ _-_ _ _ _ A _ _ (all)
Input 1 RTD
2-wire
L1
K1
J1
L2
K2
T1
S1
R1
S1
S3
Slot A
3-wire
L1
K1
J1
L2
K2
T1
S1
R1
S1
S2
S3
Slot A
• platinum, 100 and 1,000 Ω @ 0°C
• calibration to DIN curve (0.00385 Ω/Ω/°C)
• 20 Ω total lead resistance
• RTD excitation current of 0.09 mA typical. Each
ohm of lead resistance may affect the reading by
0.03°C.
• For 3-wire RTDs, the S1 lead (usually white) must
be connected to R1.
• For best accuracy use a 3-wire RTD to compensate
for lead-length resistance. All three lead wires must
have the same resistance.
PM6 _ _ _ _-_ _ _ _ A _ _ (all)
Input 1 Process
-
+
L1
K1
J1
L2
K2
T1
S1
R1
volts
Slot A
-
+
L1
K1
J1
L2
K2
T1
S1
R1
amperes
Slot A
• 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
PM6 _ _ _ _-_ _ _ _ A _ _ (all)
Input 1 Potentiometer
L1
K1
J1
L2
K2
T1
S1
R1
Slot A
CW
CCW
• Use a 1 kΩ potentiometer.
PM6 _ _ _ _-_ _ _ _ A _ _ (all)