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Watlow EZ-ZONE
®
RMC Module
•
25
•
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 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 mm2 (30 to 12 AWG)
single-wire termination or two 1 .31
mm2 (16 AWG)
• 0 .8 Nm (7 .0 in-lb .) torque
Note:
Adjacent terminals may be labeled
differently, depending on the model
number .
Note:
To prevent damage to the controller,
do not connect wires to unused ter-
minals .
Note:
Maintain electrical isolation between
digital input-outputs, switched dc/open
collector outputs and process outputs
to prevent ground loops .
Note:
If the last two digits of the part number
are "12", this equipment is suitable for
use in CLASS I, DIVISION 2, Groups A,
B, C and D or Non-Hazardous locations
only . Temperature Code T4
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 .
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 .
Open Collector Wiring Example Using DO 7-12
Vdc
Collector Outputs
Internal Circuitry
Power Supply
5 to 32 Vdc
Relay
+
-
Common
Internal Supply
Diode
Fuse
An example fuse is
Bussmann AGC-1 1/2
B_
D_
D_
D_
D_
D_
D_
Z_
Output 1, 3, 5, 7 Switched DC/Open Collector
RMC Part # Digit 5, 7, 9, 11 is U, D, E, F or G
dc - (open collector)
dc +
common
X_
W_
Y_
Slot A, B, D, E
Switched DC
• 30 mA dc maximum
supply current
• short circuit limited to
<50 mA
• 22 to 32V
Î
(dc) open
circuit voltage
• Use dc- and dc+ to
drive external solid-
state relay.
• DIN-A-MITE compat-
ible
Open Collector
• 100 mA maximum
output current sink
• 30V
Î
(dc) maximum
supply voltage
• Any switched dc out-
put can use the com-
mon terminal.
• Use an external class
2 or *SELV power
supply to control a dc
load, with the load
positive to the positive
of the power supply,
the load negative to
the open collector and
common to the power
supply negative.
*Safety Extra Low
Voltage
Switched DC
dc +
dc -
common
24V
X_
W_
Y_
Open Collector
Load
Power Supply
dc -
common
24V
X_
W_
Y_