Watlow EZ-ZONE
®
PM PID Controller
•
4
•
Chapter 1 Overview
EZ-ZONE
®
PM PID Model System Diagram
Universal Sensor Input, Configuration Communications,
Red/Green 7-Segment Display
Output Status
5
1
3
2
4
Indicates Zone
Address
Indicates I/O
Status
Zone
Address
6
Supervisory
&
Power
Board
Slot C
Output 2
none, switched dc, NO-ARC
power control (15 A), form A mechanical
(5 A) or Solid-State Relay (0.5 A)
Output 1
none, switched dc/open collect-
or, form C mechanical (5 A) relay, form A
solid-state (0.5 A) relay, process (V, mA)
off, heat, cool,
duplex, alarm,
retransmit,
event
off, heat, cool,
alarm, event
EZ Key/s
(PM4,6,8 and 9 only)
programmable event
Digital Output (or Input) 5 & 6
(optional) none, switched dc
off, heat, cool,
alarm, event
Network
remote user interface,
personal computer,
programmable logic
controller, human-
machine interface
EIA 485 Communications
Standard Bus, Modbus RTU (optional)
Digital Input (or Output) 5 & 6
(optional)
none, switch, volts dc
None
Profile start/stop
Profile start
Profile hold/resume
Profile disable
TRU-TUNE+
®
disable
Control outputs off
Manual/auto mode
Tune
Idle set point
Force alarm
Loop & alarms off
Silence alarm
Alarm reset
Lock keypad
Restore user settings
Input sensor
PID
Controller
Board
Slot A
ramp-soak
with 4 files
(optional)
Input
Functions
Output
Functions
Analog Input 1
none, Thermocouple, RTD (100Ω,
1kΩ), Thermister 5kΩ, 10kΩ, 20kΩ,
40kΩ) Process (V, mV, mA) or 1k
Potentiometer
