Watlow PM PLUS™ 6
• 28 •
Chapter 2: Installation
Wiring Notes
Maximum wire size termi-
nation and torque rating:
0.0507 to 3.30 mm2 (30
to 12 AWG) single-wire
termination or two 1.31
mm2 (16 AWG)
0.56 Nm (5.0 in-lb.)
torque
Adjacent terminals may
be labeled differently
depending on the model
number.
Do not connect wires to
unused terminals.
Maintain electrical isola-
tion between analog
input 1, digital input-
outputs, switched dc/
open collector outputs
and process outputs to
prevent ground loops.
This equipment is suit-
able for use in CLASS
I, DIVISION 2, Groups
A, B, C and D or Non-
Hazardous locations only.
Temperature Code T4A
Wiring Warnings
ç
Use National Electric
(NEC) or other country-
specific standard wiring
and safety practices
when wiring this control-
ler to a power source,
electrical sensors or pe-
ripheral devices. Failure
to do so may result in
damage to equipment
and property, and/or in-
jury or loss of life.
Explosion Hazard - Dry
contact closure Digital
Inputs shall not be used
in Class I Division 2 Haz-
ardous Locations unless
switch used is approved
for this application.
Explosion Hazard – Sub-
stitution of component
may impair suitability for
CLASS I, DIVISION 2.
Explosion Hazard - Do
not disconnect while the
circuit is live or unless
the area is known to be
free of ignitable concen-
trations of flammable
substances.
Output 2, 4 Mechanical Relay, Form A
Output 2: (L2, K2) PM _ _ _ _ [J] - _ _ _ _ _ _ _
Output 4: (L4, K4) PM _ _ _ _ _ - _ _ _ [J] _ _ _
common
normally open
L_
K_
Slot A, B
• 5A at 240V
Å
(ac) or 30V
Î
(dc) maximum
resistive load
• 20mA at 24V minimum load
• 125VA pilot duty @ 120/240V
Å
(ac), 25VA
at 24V
Å
(ac)
• 100,000 cycles at rated load
• Output does not supply power
• For use with ac or dc
• See Quencharc Wiring Example
L_
K_
Output 2, 4 Solid-State Relay, Form A
Output 2: (L2, K2) PM _ _ _ _ [K] - _ _ _ _ _ _ _
Output 4: (L4, K4) PM _ _ _ _ _ - _ _ _ [K] _ _ _
common
normally open
L_
K_
Slot A, B
• 0.5A at 20 to 264V
Å
(ac) maximum
resistive load
• 20VA 120/240V
Å
(ac) pilot duty
• Opto-isolated, without contact sup-
pression
• Maximum off state leakage of 105µA
• Minimum holding current of 10mA
• Output does not supply power
• Do not use on dc loads.
• See Quencharc Wiring Example
L_
K_
Quencharc Wiring Example
In this example the Quencharc circuit (Watlow part#
0804-0147-0000) is used to protect PM internal cir-
cuitry from the counter electromagnetic force from
the inductive user load when de-engergized. It is
recommended that this or an equivalent Quencharc
be used when connecting inductive loads to PM
outputs.
Quencharc
User Load
N
L_
K_
