Watlow EZ-ZONE RM Limit Module Rev C - Manual (Page 24)

Watlow EZ-ZONE ® RML Module • 21 • 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.
Inputs 1 through 12 Thermistor
• >20 MΩ input impedance
Input 1 - 4 (top to bottom): RMLx-(6)xxx-xxxx
Input 5 - 8 (top to bottom): RMLx-x(6)xx-xxxx
Input 9 - 12 (top to bottom): RMLx-xx(6)x-xxxx
Thermistor
S_
R_
S_
R_
S_
R_
S_
R_
Slot A, B, D
RML Part # Digits 5, 6, 7
Inputs 1 through 12 RTD
2-wire
RTD
S_
R_
S_
R_
S_
R_
S_
R_
Slot A, B, D
• platinum, 100 and 1,000 Ω @ 0°C
• calibration to DIN curve (0.00385 Ω/Ω/°C)
• 20 Ω total lead resistance
• RTD excitation current of 0.09 mA typical.
Each ohm of lead resistance may affect the
reading by 2.55°C.
Input 1 - 4 (top to bottom): RMLx-(5)xxx-
xxxx
Input 5 - 8 (top to bottom): RMLx-x(5)xx-
xxxx
Input 9 - 12 (top to bottom): RMLx-xx(5)x-
xxxx
RML Part # Digits 5, 6, 7
Common
DC Input
B1
D1
D2
D3
D4
D5
D6
Z1
Slot D
Supply
DC Input
DC Input
DC Input
DC Input
DC Input
Internal
Digital Input Event Condi-
tions
• Dry Contact
- Input inactive when >
100KΩ
- Input active when < 50Ω
• Voltage
- Input inactive when < 2V
- Input active when > 3V
• Six user configurable digital
inputs/outputs per slot
- Slot D DI 1 - 6 RMLx-x(C)
xx-xxxx
- Slot E DI 9 RMLx-xxx(B)-
xxxx
Note:
When using a dry contact
with Digital Input 9 (Slot E),
notice that the connection is
made between pins B9 and
D9.
RML Part # Digit 7, 8 is C and or B Respectively
Digital Inputs 1 through 6 and 9
Common
DC Input
B9
D9
Slot E
B
common
Vdc
D
_
_
D
_
24 Vdc
_
Z
Voltage Input
AWG Ohms/1000ft
14 2.575
16 4.094
18 6.510
20 10.35
22 16.46
24 26.17
26 41.62
28 66.17
D
_
24 Vdc
_
B
Dry Contact
Slot E Slot D