Input 2 thermocouple, Input 2 rtd, Input 2 process – Watlow Electric Integrated Controller User Manual Rev C EZ-ZONE PM User Manual

Page 17: Input 2 potentiometer

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

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1 5

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C h a p t e r 2 I n s t a l l a n d W i r e

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.

Input 2 Thermocouple

Slot B

• 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 _ _

Input 2 RTD

2-wire

Slot B

3-wire

Slot B

• 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 R2.

• For best accuracy use a 3-wire RTD to compensate

for lead-length resistance. All three lead wires must
have the same resistance.

PM6 _ _ _ _-_ (R or L) _ _ A _ _

Input 2 Process

volts

Slot B

amperes

Slot 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

PM6 _ _ _ _-_ (R, T or L) _ _ A _ _

Input 2 Potentiometer

Slot B

CCW

• Use a 1 kΩ potentiometer.

PM6 _ _ _ _-_ (R or L) _ _ A _ _