Watlow EZ-ZONE ® RME (Expansion) Module

Watlow EZ-ZONE ®  RME (Expansion) Module

Product basic information and positioning

1. Core positioning and system role

Watlow EZ-ZONE ®  The RME module is an I/O expansion module designed specifically for the RM series industrial control system, without independent PID control function. Its core function is to supplement digital/analog I/O interfaces, provide logical operations, timing control, and special device driving capabilities, and achieve I/O expansion and device linkage in distributed control scenarios. It needs to work in conjunction with other modules in the RM series (such as RMC controller, RMA communication gateway), supporting a maximum of 17 modules to form a system (1 RMA+16 other RM modules), adapting to the control requirements of multiple devices and nodes in industrial automation. It is typically used in semiconductor manufacturing, chemical engineering HVAC、 Food processing and other fields.

2. Basic specifications and environmental adaptability

(1) Physical and Power Supply Specifications

Project parameter description

Installation method DIN rail (EN50022 standard, 35 × 7.5mm)/Panel installation requires vertical installation to avoid horizontal or inclined installation affecting heat dissipation and stability

Dimensions: 155mm (height) x 116.08mm (width) x 44.45mm (depth) Weight: Approximately 453.59g, 76.2mm top/bottom/front maintenance space needs to be reserved

Power supply requirements: 20.4-30.8V AC/DC, Class 2 or SELV certified power consumption of 7W/14VA, supporting Semi F47-0200 voltage drop standard (keep running during voltage drop)

Wire specifications support 12-30 AWG single/multi strand copper wire stripping length of 7.6mm, terminal torque: right angle terminal 0.56 Nm, front terminal 0.5 Nm

(2) Environmental and Certification Standards

Environmental parameters: operating temperature -18~65 ° C (non condensing), storage temperature -40~85 ° C, relative humidity 0-90% RH (non condensing), protection level IP20 (to be installed in NEMA Type 1 or higher protective enclosures).

Certification qualifications: UL/EN 61010 (Process Control Equipment Safety), Class 1 Div. 2 (optional, suitable for hazardous areas, temperature code T4), RoHS (Environmental Protection), WEEE (Waste Recycling), CE (EU Compliance), some models have passed FM Class 3545 (Temperature Limiting Equipment) certification.

Warranty policy: 3-year warranty, covering manufacturing defects, excluding faults caused by transportation damage, human misuse, or unauthorized modification; Returns need to apply for a Return Material Authorization (RMA) number from Watlow in advance, and provide information such as product model, fault description, and contact information.

Core functions and technical features

1. I/O expansion function (core capability)

The core value of the RME module is to provide flexible I/O expansion, supporting digital input/output, current transformer (CT) input, relay/SSR output, process retransmission output, and other types. The specific specifications are as follows:

(1) Input functions and parameters

Maximum number of input types, key specifications, applicable scenarios

24 channels of digital input support dry contact/DC voltage input:

-Dry contact: Close resistance<50 Ω, open resistance>100K Ω

-DC voltage: Low state<2V, high state>3V, connected to limit switches, buttons, sensor status signals

Current Transformer (CT) input 16 channels input range 0-50mA AC, compatible with Watlow 16-0246 CT model

Accuracy ± 1mA, response time ≤ 1 second, input impedance 100 Ω to monitor the current of heaters, motors and other equipment, and determine load faults

(2) Output functions and parameters

Output type, maximum quantity, key specifications, applicable scenarios

Digital output (open collector) 24 channels maximum voltage 32V DC, single channel maximum sink current 1.5A, total sink current 8A

External Class 2/SELV power supply is required to drive small relays, LED indicator lights, and sensors

Mechanical relay output 16 channels (4 channels/slot) Form A contact, 5A/240V AC (resistive load), 100000 cycle life

Support AC/DC loads, pay attention to matching the load type to drive high-power heaters, pumps, solenoid valves, and other equipment

Solid state relay (SSR) outputs in 2 specifications:

-2A SSR: 16 channels (4 channels/slot)

-10A SSR: 8 channels (2 channels/slot) 2A SSR: 20-264V AC, 50VA pilot duty

10A SSR: 240V AC (resistive load), 20A/50 ° C, 12A/65 ° C derating high-frequency switch load (such as precision heater, high-frequency motor), no mechanical wear

Process/retransmission output 12 channels (3 channels/slot) supporting 0-10V DC (minimum load 4k Ω) or 0-20mA DC (maximum load 400 Ω)

Can be independently configured as voltage/current output, supporting signal retransmission and calibration output control signals to valve positioners, frequency converters, or retransmission process values to recorders

2. Control and operation functions (logic and timing capabilities)

The RME module is equipped with various control and operation modules, which can achieve basic logic judgment, timing control, and data processing without relying on external controllers. The specific functions are as follows: