Watlow Integrated Controller User Manual Rev C EZ-ZONE PM User Manual page 16

Ó
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 NE P M I n te g r at e d C o n tr o lle r
Input 1 Thermocouple
Slot A
L1
K1
J1
L2
K2
T1
-
S1
+
R1
Input 1 RTD
Slot A
L1
K1
J1
L2
K2
S2
T1
S3
S1
S3
S1
R1
S1
2-wire
Input 1 Process
Slot A
L1
K1
J1
L2
K2
+
T1
-
S1
+
R1
volts
Input 1 Potentiometer
Slot A
L1
K1
J1
• Use a 1 kΩ potentiometer.
L2
PM6 _ _ _ _-_ _ _ _ A _ _ (all)
K2
T1
CW
S1
R1
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 S1.
• To reduce errors, the extension wire for thermocouples must be
of the same alloy as the thermocouple.
PM6 _ _ _ _-_ _ _ _ A _ _ (all)
Slot A
• platinum, 100 and 1,000 Ω @ 0°C
L1
• calibration to DIN curve (0.00385 Ω/Ω/°C)
K1
• 20 Ω total lead resistance
• RTD excitation current of 0.09 mA typical. Each
J1
ohm of lead resistance may affect the reading by
L2
0.03°C.
• For 3-wire RTDs, the S1 lead (usually white) must
K2
be connected to R1.
T1
• For best accuracy use a 3-wire RTD to compensate
S1 for lead-length resistance. All three lead wires must
have the same resistance.
R1
PM6 _ _ _ _-_ _ _ _ A _ _ (all)
3-wire
Slot A
L1
K1
J1
• 0 to 20 mA @ 100 Ω input impedance
• 0 to 10VÎ (dc) @ 20 kΩ input impedance
L2
• 0 to 50 mVÎ (dc) @ 20 kΩ input impedance
K2
• scalable
T1 PM6 _ _ _ _-_ _ _ _ A _ _ (all)
-
S1
R1
amperes
14
•
C hapter 2 In stal l an d W ir e