Watlow Integrated Controller User Manual Rev C EZ-ZONE PM User Manual page 17

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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 mm 2 (30 to
12 AWG) single-wire termi-
nation or two 1.31 mm 2 (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.
®
Wat lo w EZ-ZO N E P M I n t eg r a te d C o n tr o lle r
Input 2 Thermocouple
Slot B
L3
K3
J3
L4
K4
T2
-
S2
+
R2
Input 2 RTD
Slot B
L3
K3
J3
L4
K4
S2
T2
S3
S2
S3
S1
R2
S1
2-wire
Input 2 Process
Slot B
L3
K3
J3
L4
K4
+
T2
-
S2
+
R2
volts
Input 2 Potentiometer
Slot B
L3
K3
J3
• Use a 1 kΩ potentiometer.
L4
PM6 _ _ _ _-_ (R or L) _ _ A _ _
K4
T2
CW
S2
R2
CCW
•
• 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 S2.
• To reduce errors, the extension wire for thermocouples must be
of the same alloy as the thermocouple.
PM6 _ _ _ _-_ (R or L) _ _ A _ _
Slot B
• platinum, 100 and 1,000 Ω @ 0°C
L3
• calibration to DIN curve (0.00385 Ω/Ω/°C)
K3
• 20 Ω total lead resistance
• RTD excitation current of 0.09 mA typical. Each
J3
ohm of lead resistance may affect the reading by
L4
0.03°C.
• For 3-wire RTDs, the S1 lead (usually white) must
K4
be connected to R2.
T2
• For best accuracy use a 3-wire RTD to compensate
for lead-length resistance. All three lead wires must
S2
have the same resistance.
R2
PM6 _ _ _ _-_ (R or L) _ _ A _ _
3-wire
Slot B
L3
K3
J3 • 0 to 20 mA @ 100 Ω input impedance
• 0 to 10VÎ (dc) @ 20 kΩ input impedance
L4
• 0 to 50 mVÎ (dc) @ 20 kΩ input impedance
K4
• scalable
T2 PM6 _ _ _ _-_ (R, T or L) _ _ A _ _
-
S2
R2
amperes
15
•
Chapter 2 Instal l a nd W ir e