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 .
Watlow EZ-ZONE
®
RMC Module
•
24
•
Chapter 2 Install and Wire
Suppressor Note:
Switching pilot duty inductive loads (re-
lay coils, solenoids, etc .) with the me-
chanical relay, solid state relay or open
collector output options requires use of
an R .C . suppressor
.
Digital Inputs/Outputs 7 through 12
RMC Part # Digit 11 is C
Common
Collector out
Collector out
B7
D7
D8
D9
D10
D11
D12
Z7
Slot E
Collector out
Collector out
Collector out
Collector out
Internal Supply
• Maximum switched
voltage is 32V
Î
(dc)
• Internal supply pro-
vides a constant pow-
er output of 750mW
• Maximum output
sink current per out-
put is 1.5A (external
class 2 or *SELV sup-
ply required)
• Total sink current for
all outputs not to ex-
ceed 8A
• Do not connect out-
puts in parallel
*Safety Extra Low Volt-
age
Common
Internal
Supply
D12
D11
D10
D9
D8
B7
D7
Z7
Switched DC Wiring Example Using DO 7-12
Vdc
Collector Outputs
Internal Circuitry
Internal Supply
+
+
+
-
-
-
DC90-60C0-0000
Htr 3
Htr 2
Htr 1
B_
D_
Z_
D_
D_
D_
D_
D_
Common
Note:
As a switched DC output; this output is a constant current output delivering
750 mW, current limited to 400 mA. The internal supply does have a maximum
open circuit voltage of 22 VDC and minimum open circuit voltage of 19 VDC.
Pin Z7 is shared to all digital outputs. This type of output is meant to drive solid
state relays, not mechanical relays.
As an open collector output, use an external power supply with the negative
wired to B7, the positive to the coil of a pilot mechanical relay and the other
side of the coil wired to D_. Each open collector output can sink 1.5 A with
the total for all open collector outputs not exceeding 8 amperes. Ensure that a
kickback diode is reversed wired across the relay coil to prevent damage to the
internal transistor.