Watlow ez-zone pm - Digital Input 7 - 12; Input 1, 2 RTD; Input 1, 2 Thermocouple

Watlow EZ-ZONE
®
PM Integrated Controller • 23 • Chapter 2 Install and Wire
Warning:
Óç
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 mm
2
(30 to 12 AWG)
single-wire termination or two 1.31
mm
2
(16 AWG)
• 0.8 Nm (7.0 lb.-in.) torque
Note:
Adjacent terminals may be labeled
differently, depending on the model
number.
Note:
To prevent damage to the control-
ler, do not connect wires to unused
terminals.
Note:
Maintain electrical isolation between
analog input 1, digital input-outputs,
switched dc/open collector outputs
and process outputs to prevent ground
loops.
Note:
The control output common terminal
and the digital common terminal are
referenced to different voltages and
must remain isolated.
Note:
This Equipment is suitable for use in
CLASS I, DIVISION 2, Groups A, B,
C and D or Non-Hazardous locations
only. Temperature Code T4A
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.
Digital Input 7 - 12
Common
DC Input
B7
D7
D8
D9
D10
D11
D12
Z7
Slot E
Supply
DC Input
DC Input
DC Input
DC Input
DC Input
Input 1, 2 Thermocouple
-
+
S_
R_
Slot A,B
• 2KΩmaximumsourceresistance
• >20MΩinputimpedance
• 3microampereopen-sensordetection
• Thermocouplesarepolaritysensitive.Thenegativelead(usually
red) must be connected to S1.
• Toreduceerrors,theextensionwireforthermocouplesmustbe
of the same alloy as the thermocouple.
Input 1: PM _ [C,R,B
*
] _ _ _ - _ _ _ _ _ _ _ (S1/R1)
Input 2: PM _ _ _ _ _ - _ [C,R,L] _ _ _ _ _ (S2/R2)
*PM(4, 8 and 9) only
Input 1, 2 RTD
2-wire
S_
R_
S1
S3
Slot A,B
3-wire
T_
S_
R_
S1
S2
S3
Slot A, B
• 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0.03°C.
• For3-wireRTDs,theS1lead(usuallywhite)mustbecon-
nected to R1.
• Forbestaccuracyusea3-wireRTDtocompensateforlead-
length resistance. All three lead wires must have the same
resistance.
Input 1: PM _ [C,R,B
*
] _ _ _ - _ _ _ _ _ _ _ (S1/R1),(T1/S1/R1)
Input 2: PM _ _ _ _ _ - _ [C,R,L] _ _ _ _ _ (S2/R2),(T2/S2/R2)
*PM(4, 8 and 9) only
Digital Input Event Conditions
•DryContact
 -Inputinactivewhen>100KΩ
 -Inputactivewhen<50Ω
•Voltage
 -Inputinactivewhen<2V
 -Inputactivewhen>3V
•Sixuserconfigurabledigitalin-
puts/outputs per slot
- Slot E DIO 7-12
PM [4,6,8] _ _ _ _- [C,D] _ _ _ _
_ _
Digital Inputs
supply Z7
common B7
D7
D8
D12
D11
D10
D9