Watlow EZ-ZONE ® RME (Expansion) Module

(1) Basic operation module

Function type, instance quantity, core capability configuration points

16 logical operations support 8 types of logical relationships: AND, OR, NOT, XOR, NAND, NOR, EQUAL, NOT EQUAL

Up to 8 input sources can be connected, and supporting cross module signal linkage requires configuring "Source Function" (input source type), "Source Instance" (input source instance), and "Active Level" on the Setup page

8 timing functions support 4 timing modes: On Pulse, Delay, One Shot, Retained

The time range is 0-9999 seconds, and "Run Active Level" and "Reset Active Level" can be set. They are commonly used in scenarios such as device startup delay, operation timing, fault delay alarm, etc., and need to be associated with trigger signals (such as digital inputs and alarm outputs)

8 counting functions support increasing and decreasing counts (reset to 0 after increasing to 9999, reset to 9999 after decreasing to 0)

It is possible to set "Load Value" (initial value), "Target Value" (target value, triggering output upon arrival), and "Latching" (output locking) to adapt to production line product counting and equipment running frequency statistics. Counting trigger sources (such as encoder signals and travel switches) need to be configured

8 mathematical operations support 16 types of operations: addition, subtraction, multiplication, division, average, maximum/minimum, square root, absolute value, pressure to height conversion, dew point calculation, etc

Up to 5 input sources can be connected, supporting unit conversion and filtering (0-60 seconds filtering time) for multi signal fusion (such as multi-sensor average calculation) and physical quantity conversion (such as pressure signal to height conversion), requiring a unified input source unit

Linearize 8 10 point linearization calibrations, supporting two modes: "Interpolated" and "Stepped"

Nonlinear errors of non-standard sensors can be corrected. For example, thermocouples and pressure sensors need to enter 10 sets of "Input Points" (actual measured values) and "Output Points" (calibrated values) on the Setup page to ensure that the data points increase in increments

(2) Special equipment control function

For common special equipment in industrial scenarios, the RME module provides dedicated control logic to reduce external programming workload:

Compressor control: Supports 1-2 control loop linkage, can set "Input A/B Turn On/Off" (start stop threshold), "Minimum On/Off Time" (minimum start stop time to avoid frequent start stop wear), "Time Delay" (delayed shutdown time), suitable for refrigeration systems, air compressors and other equipment.

Electric valve control: supports fully open/fully closed valve drive, requires configuration of "Valve Travel Time" and "Dead Band" to avoid frequent adjustments. The algorithm automatically calculates the "Dead Time" (minimum action time=dead zone/100 x travel time) and is compatible with two-wire electric valves.

Sequencer control: Allocate a single power signal into 4 outputs, with "Output 1" being the "vernier output" (proportional signal, with the highest proportion) and "Output 2-4" being ON/OFF outputs. It supports two modes: "Linear" (fixed order) and "Progressive" (cyclic order), balancing the load wear of multiple heaters and pumps.

3. Alarm and safety functions (fault protection capability)

(1) Alarm function

Alarm instances: 8 independent alarm instances, supporting two types: "Process Alarm" (based on fixed threshold) and "Deviation Alarm" (based on set value deviation).

Configuration parameters: "High/Low Set Point" (high/low alarm threshold), "Hysteresis" (alarm hysteresis to avoid frequent triggering), "Latching" (locking, requiring manual reset), "Blocking" (blocking, temporarily not alarming when starting or setting value changes), "Silencing" (mute, temporarily closing output when alarming) can be set.

Alarm response: After the alarm is triggered, it can be linked to output (such as cutting off the load, starting the backup equipment), or uploaded to PLC/HMI through communication, supporting RUI interface pop-up prompts and sound and light alarms.

(2) Security features

Adaptation to hazardous areas: Modules with the end number "12" support Class 1 Div. 2 hazardous areas (Groups A-D, temperature code T4), and require the use of explosion-proof certified junction boxes and shielded armored cables. It is prohibited to plug and unplug live wires to avoid arcing.

Electrical safety: Maintain electrical isolation between analog input, digital I/O, and process output, with a grounding resistance of ≤ 4 Ω to prevent grounding loops; It is recommended to connect a 1A slow melting fuse (such as Littelfuse 0215001. MXP) in series with the power input terminal to prevent overload damage.

Permission management: Supports two levels of passwords (User/Administrator), with the User password only used for regular operations and the Admin password able to modify security settings; Optional 'Rolling Password', automatically changes after power failure, requires calculation of the current password using a formula (User Password=(pas.u × Code) Mod 929+70); Admin password=(pas. a x Code) Mod 997+1000 to prevent unauthorized access.