Watlow Electric EZ-ZONE PM Input 2 Thermocouple, Input 2 RTD, Input 2 Process, Input 2 Potentiometer

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Input 2 Thermocouple

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 electrical sensors or peripheral devices. Failure to do so may result in damage to equipment and property, and/or injury or loss of life.

Slot B

L3

K3

J3

L4

K4

T2

-

S2

+

R2

•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 _ _

Note:

Input 2 RTD

Maximum wire size termination 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, depending on the model number.

	Slot B		Slot B
	L3		L3
	K3		K3
	J3		J3
	L4		L4
	K4		K4
	T2	S2	T2
S3	S2	S3	S2
S1	R2	S1	R2

2-wire3-wire

•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 _ _

Note:

To prevent damage to the controller, do not connect wires to unused terminals.

Note:

Maintain electrical isolation between analog input 1, digital input-outputs, switched dc/open collector outputs and process outputs to prevent ground loops.

Note:

The control output common terminal and the digital common terminal are referenced

Input 2 Process

			Slot B			Slot B
		L3				L3
		K3				K3
		J3				J3	• 0 to 20 mA @ 100 Ω input impedance
		L4				L4	• 0 to 10VÎ (dc) @ 20 kΩ input impedance
							• 0 to 50 mVÎ (dc) @ 20 kΩ input impedance
		K4				K4
							• scalable
				+
		T2				T2	PM6 _ _ _ _-_ (R, T or L) _ _ A _ _
-					-
		S2				S2
	+	R2				R2
		volts				amperes

Input 2 Potentiometer

to different voltages and must remain isolated.

CW

Slot B

L3

K3

J3

L4

K4

T2

S2

•Use a 1 kΩ potentiometer. PM6 _ _ _ _-_ (R or L) _ _ A _ _

CCW R2

Watlow EZ-ZONE®PM Integrated Controller • 15 • Chapter 2 Install and Wire