Watlow EZ-ZONE PM Integrated Controller - Manual (Page 29)

Watlow EZ-ZONE ® PM Integrated Controller • 26 • 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
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)
• 0.8 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 termi-
nal 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 - Dry contact clo-
sure Digital Inputs shall not be used
in Class I Division 2 Hazardous Loca-
tions unless switch used is approved
for this application.
Warning:
ç
Explosion Hazard – Substitution of
component may impair suitability
for CLASS I, DIVISION 2.
Warning:
ç
Explosion Hazard - Do not discon-
nect while the circuit is live or
unless the area is known to be free
of ignitable concentrations of flam-
mable substances.
Digital Input 7 - 12
Common
DC Input
B7
D7
D8
D9
D10
D11
D12
Z7
Slot E
Internal 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 and/or S2.
• 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 and/or R2
• 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] _ _ _ _
_ _
common
Vdc
B
_
D
_
D
_
_
24 Vdc
Z
Dry Contact
Voltage Input