Watlow ez-zone pm - Page 43

Watlow EZ-ZONE
®
PMI Controller • 39 • 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 1, 3 Switched DC/Open Collector
dc - (open collector)
dc +
common
X_
W_
Y_
Slot A, B
Switched DC
• Maximum open circuit
voltage is 22 to 25VÎ (dc)
• 30mA max. per single
output / 40mA max. total
per paired outputs (1 & 2,
3 & 4)
• Typical drive; 4.5VÎ (dc)
@ 30mA
• Short circuit limited to
<50mA
• NPN transistor sink
• Use dc- and dc+ to drive
external solid-state relay
• 1-pole DIN-A-MITE: up to 4
in parallel or 4 in series
• 2-pole DIN-A-MITE: up to 2
in parallel or 2 in series
• 3-pole DIN-A-MITE: up to
2 in series
Open Collector
• 100mA maximum output
current sink
• 30VÎ (dc) max. supply
voltage
• Any switched dc output
can use the common ter-
minal.
• Use an external power
supply to control a dc
load, with the load posi-
tive to the positive of the
power supply, the load
negative to the open col-
lector and common to the
power supply negative.
See Quencharc note.
Switched DC
Open Collector
Load
Power Supply
dc -
common
24VDC
X
_
W
_
Y
_
Output 1: (X1,-W1,+Y1)
PM _ _ _ [C] _ - _ _ _ _ _
_ _
Output 3: (X3,-W3,+Y3)
PM _ _ _ _ _ - _ _ [C] _ _
_ _
dc +
dc -
common
24VDC
X
_
W
_
Y
_
1(–) (+)2
4(–) (+)3
(-) (+)
Switched DC
Heater
Limit Control
Contacts
(If Required)
L2
L1
SSR-240-25A-DC1
Semiconductor
Fuse