- Watlow EZ-ZONE PM Integrated Controller User Manual

Watlow EZ-ZONE
®
PM Integrated Controller 15 Chapter 2 Install and Wire
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.
Input 2 Thermocouple
-
+
L3
K3
J3
L4
K4
T2
S2
R2
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
L3
K3
J3
L4
K4
T2
S2
R2
S1
S3
Slot B
3-wire
L3
K3
J3
L4
K4
T2
S2
R2
S1
S2
S3
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
-
+
L3
K3
J3
L4
K4
T2
S2
R2
volts
Slot B
-
+
L3
K3
J3
L4
K4
T2
S2
R2
amperes
Slot B
0 to 20 mA @ 100 Ω input impedance
0 to 10VÎ (dc) @ 20 kΩ input impedance
0 to 50 mVÎ (dc) @ 20 kΩ input impedance
• scalable
PM6 _ _ _ _-_ (R, T or L) _ _ A _ _
Input 2 Potentiometer
L3
K3
J3
L4
K4
T2
S2
R2
Slot B
CW
CCW
Use a 1 kΩ potentiometer.
PM6 _ _ _ _-_ (R or L) _ _ A _ _