Watlow ez-zone pm - Page 46

Watlow EZ-ZONE
®
PMI Controller • 42 • 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 Switched DC
dc+
dc-
W_
Y_
Slot A, B
• Maximum open cir-
cuit voltage is 22 to
25VÎ (dc)
• 30mA max. per sin-
gle 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
Output 2: (-W2, +Y2)
PM _ _ _ _ [C] - _ _ _
_ _ _ _
Output 4: (-W4, +Y4)
PM _ _ _ _ _ - _ _ _
[C] _ _ _
dc +
dc -
common
24VDC
W
_
Y
_
1(–) (+)2
4(–) (+)3
(-) (+)
Switched DC
Heater
Limit Control
Contacts
(If Required)
L2
L1
Semiconductor
Fuse
SSR-240-25A-DC1