User guide

Watlow EZ-ZONE
®
PM PID Controller • 21 • 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
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)
• 0.8 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 termi-
nal 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 - Dry contact clo-
sure Digital Inputs shall not be used
in Class I Division 2 Hazardous Loca-
tions unless switch used is approved
for this application.
Warning:
ç
Explosion Hazard – Substitution of
component may impair suitability
for CLASS I, DIVISION 2.
Warning:
ç
Explosion Hazard - Do not discon-
nect while the circuit is live or
unless the area is known to be free
of ignitable concentrations of flam-
mable 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 1 Solid-State Relay, Form A
normally open
common
L1
K1
Slot A
• 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.
PM _ _ _ [K] _-_ AAAA _ _
L1
K1
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
Output 2 Switched DC
dc+
dc-
W2
Y2
Slot A
• 10mAdcmaximumsupplycur-
rent
• shortcircuitlimitedto<50mA
• 22to32VÎ (dc) open circuit volt-
age
• usedc-anddc+todriveexternal
solid-state relay
• DIN-A-MITEcompatible
• single-pole:upto2inseries,
none in parallel
PM _ _ _ _ [C]-_ AAAA _ _
dc +
dc -
common
24V
W2
Y2