Watlow PM PLUS ™ PID/Integrated Limit Controller

Watlow PM PLUS ™  PID/Integrated Limit Controller

Product Core Overview

Watlow PM PLUS ™  It is an enhanced PID/integrated limit controller that optimizes user experience and functional scalability while being compatible with the previous generation EZ-ZONE PM controller. The product is positioned as an industrial grade temperature and process control, supporting single/dual PID control loops and integrating functions such as limit control, timing, and curve programming. It is widely used in semiconductor manufacturing, chemical reactions, equipment heating, and other scenarios. Its core advantages include Bluetooth wireless configuration, intuitive touch operation, support for multiple communication protocols, and comprehensive security authentication, which can adapt to the precise control needs in complex industrial environments.

Core features:

Compatibility and Upgradeability: Fully compatible with the wiring and parameter settings of EZ-ZONE PM, can be replaced without hardware modification, and upgraded with smooth touch keyboard, multilingual display (English/German/Spanish) and other operations.

Control capability: Supports PID (including P/PI/PD mode), switch control, curve programming (4 curves, a total of 40 steps), equipped with TRU-TUNE+adaptive algorithm and automatic tuning function to improve dynamic control accuracy.

Communication and wireless functions: Supports Bluetooth (via EZ-LINK mobile application), Modbus RTU/TCP, EtherNet/IP, DeviceNet and other protocols, allowing remote configuration of parameters and monitoring, reducing on-site wiring dependence.

Safety and Certification: Certified by UL, CSA, CE, RoHS, FM, etc., some models support Class 1, Zone 2 hazardous environments, integrate limit control and multiple alarms to ensure equipment and personnel safety.

Product model and core configuration

（1） Model classification and structure

The product is divided into three series based on installation size and function. The core model parameters are defined by a 14 digit configuration code, and the key dimensions are as follows:

Classification, specific specifications, applicable scenarios

Installation size: 1/16 DIN (PM6), 1/8 DIN vertical (PM8), 1/8 DIN horizontal (PM9). Different panel space requirements, 1/16 DIN is suitable for compact scenarios, and 1/8 DIN is suitable for multi parameter display requirements

Core function - PID basic type (C/R/T/J/N): including universal input, curve programming (some models), and timing function

-Integrated limit type (L/M): Additional support for sensor backup, over limit protection, output 4 fixed limit control - Basic type: Single heating/cooling control

-Integrated type: Scenarios that require dual safety protection (such as high-temperature furnaces and hazardous material heating)

The power supply and I/O power supply can be selected from 100-240V AC or 20-28V AC/12-40V DC. The digital I/O supports 2-point or 6-point expansion to adapt to the global power grid. Multiple I/O point models can be connected to external trigger signals (such as emergency stop and start switches)

Output types support switch DC, mechanical relay (5A), SSR (0.5A), NO-ARC relay (15A), universal process output (0-10V/4-20mA) - NO-ARC relay: high-power resistive load (such as large heaters)

-Universal process output: signal retransmission to recorder or PLC

（2） Core hardware specifications

Category detailed parameters

Input Characteristics - Universal Input: Thermocouple (J/K/T/E, etc.), RTD (100 Ω/1k Ω), Process Signal (0-20mA/0-10V)

-Input accuracy: ± 0.1% range (typical value), temperature stability ± 100ppm/° C

-Sensor backup: supports dual sensor switching, automatically switches to backup sensor in case of failure

Output Capacity - Maximum Output: 15A NO-ARC Relay (AC Load Only)

-Process output: 0-10V (minimum 1k Ω load) or 4-20mA (maximum 800 Ω load), accuracy ± 20 μ A/± 10mV

Environmental adaptability - Operating temperature: 0-65 ° C (non condensing)

-Protection level: Front panel IP67/IP4X (indoor)

-Anti interference: Compliant with IEC 61000-4 series standards, anti-static and radio frequency interference resistant

Installation and wiring specifications

（1） Installation requirements

Panel opening and fixing

Size standards: 1/16 DIN (PM6) opening 45 × 45mm, 1/8 DIN (PM8/9) opening 45 × 92mm (vertical)/92 × 45mm (horizontal).

Installation steps: Remove the terminal and fixing ring → Insert the controller from the front of the panel → Align the fixing ring and tighten the screws (torque 3-4 in lbs) → Reinstall the terminal.

Environmental restrictions: Avoid corrosive gases and high vibration environments, install vertically to ensure heat dissipation, and reserve a spacing of ≥ 30mm for parallel installation of multiple units.

Power supply and wiring safety

Power adaptation: High power models (1/2) are connected to 100-240V AC, while low-power models (3/4) are connected to 20-28V AC/12-40V DC, and must match the power type indicated on the equipment label.

Wiring specifications: Wire specifications are 12-30 AWG, terminal torque is 5.0 in lb, unused terminals need to be empty, analog input and power/digital signals need to be isolated and wired to avoid grounding loops.