Watlow ez-zone pm - Output 2, 4 Mechanical Relay, Form a; Output 2, 4 Solid-State Relay, Form a; Quencharc Wiring Example

Watlow EZ-ZONE
®
PM Integrated Controller • 28 • Chapter 2 Install and Wire
Warning:
Óç
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 pe-
ripheral devices. Failure to do so may
result in damage to equipment and
property, and/or injury or loss of life.
Note:
Maximum wire size termination and
torque rating:
• 0.0507 to 3.30 mm
2
(30 to 12 AWG)
single-wire termination or two 1.31
mm
2
(16 AWG)
• 0.8 Nm (7.0 lb.-in.) torque
Note:
Adjacent terminals may be labeled
differently, depending on the model
number.
Note:
To prevent damage to the control-
ler, 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 to different voltages and
must remain isolated.
Note:
This Equipment is suitable for use in
CLASS I, DIVISION 2, Groups A, B,
C and D or Non-Hazardous locations
only. Temperature Code T4A
Warning:
ç
Explosion Hazard – Substitution of
component may impair suitability for
CLASS I, DIVISION 2.
Warning:
ç
Explosion Hazard - Do not disconnect
while the circuit is live or unless the
area is known to be free of ignitable
concentrations of flammable sub-
stances.
Output 2, 4 Mechanical Relay, Form A
common
normally open
L_
K_
Slot A, B
• 5Aat240VÅ (ac) or 30VÎ (dc)
maximum resistive load
• 20mAat24Vminimumload
• 125VApilotduty@120/240VÅ
(ac), 25 VA at 24VÅ (ac)
• 100,000cyclesatratedload
• Outputdoesnotsupplypower.
• forusewithacordc
See Quencharc note.
Output 1: (L2, K2)
PM _ _ _ _ [J] - _ _ _ _ _ _ _
Output 3: (L4, K4)
PM _ _ _ _ _ - _ _ _ [J] _ _ _
L
_
K
_
Output 2, 4 Solid-State Relay, Form A
common
normally open
L_
K_
Slot A, B
• 0.5Aat20to264VÅ (ac) maxi-
mum resistive load
•20VA120/240VÅ (ac) pilot duty
•opto-isolated,withoutcontact
suppression
• maximumoffstateleakageof
105 microamperes
• Outputdoesnotsupplypower.
• Donotuseondcloads.
See Quencharc note.
Output 1: (L2, K2)
PM _ _ _ _ [K] - _ _ _ _ _ _ _
Output 3: (L4, K4)
PM _ _ _ _ _ - _ _ _ [K] _ _ _
L
_
K
_
Quencharc Wiring Example
In this example the Quencharc circuit (Watlow
part# 0804-0147-0000) is used to protect PM
internal circuitry from the counter electro-
magnetic 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
L
_
K
_
N
1.1
0
-20
50
40
30
20100
-10
60 70
Amps RMS
Ambient Temperatue (
o
C)
0.1
1
0.2
0.9
0.3
0.4
0.5
0.6
0.7
0.8
1 Amp SSR Derating Curve
Safe Operating Area
Quencharc Note:
Switching pilot duty inductive
loads (relay coils, solenoids,
etc.) with the mechanical
relay, solid state relay or
open collector output options
requires use of an R.C. sup-
pressor.