Watlow ez-zone pm - Page 48

Watlow EZ-ZONE
®
PMI Controller • 44 • Chapter 2 Install and Wire
Warning:
ç
Use National Electric (NEC) or
other country-specific standard
wiring and safety practices when
wiring and connecting this con-
troller 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.
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)
• 0.56 Nm (5.0 in-lb.) torque
Note:
Adjacent terminals may be la-
beled differently, depending on
the model number
.
Note:
To prevent damage to the con-
troller, do not connect wires to
unused terminals.
Note:
Maintain electrical isolation
between digital input-outputs,
switched dc/open collector
outputs and process outputs to
prevent ground loops.
Note:
This equipment is suitable for
use in CLASS I, DIVISION 2,
Groups A, B, C and D or Non-
Hazardous locations only. Tem-
perature Code T4
Warning:
ç
Explosion Hazard – Substitution
of component may impair suit-
ability for CLASS I, DIVISION 2.
Warning:
ç
Explosion Hazard - Do not dis-
connect while the circuit is live
or unless the area is known to be
free of ignitable concentrations
of flammable substances.
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. suppressor.
Output 2, 4 Solid-State Relay, Form A
common
nor
mally open
L_
K_
Slot A, B
• 0.5A at 20 to 264VÅ
(ac) maximum resistive
load
• 20VA 120/240VÅ (ac) pi-
lot duty
• Opto-isolated, without
contact suppression
• Maximum off state
leakage of 105µA
• Minimum holding cur-
rent of 10mA
• Output does not supply
power
• Do not use on dc loads.
See Quencharc note
Output 2: (L2, K2)
PM _ _ _ _ [K] - _ _ _ _ _
_ _
Output 4: (L4, K4)
PM _ _ _ _ _ - _ _ _ [K] _
_ _
L
_
K
_
1.1
0
-20
50
40
30
20100
-10
60 70
Amps RMS
Ambient Temperature (
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 Wiring Example
In this example the Quencharc
circuit (Watlow part# 0804-
0147-0000) is used to protect
PM internal circuitry from the
counter electromagnetic force
from the inductive user load
when de-engergized. It is recom-
mended that this or an equiva-
lent Quencharc be used when
connecting inductive loads to PM
outputs.
Quencharc
User Load
N
L
_
K
_