Automated Logic MEx816u I/O Expansion Module

Automated Logic MEx816u I/O Expansion Module

Product positioning and main features

The MEx I/O extender is used for expanding the I/O points of the ME series controller, supporting direct stacking on the ME controller, local stacking panel installation, or remote layout. Core features:

High resolution universal input/output, high measurement and control accuracy;

A single ME controller can connect up to 5 MEx expansion modules; Remote installation with a maximum distance of 100 feet; The first module can be directly stacked on top of the ME812u controller to save control cabinet space;

Detachable screw terminal block, convenient for wiring, maintenance and repair;

Durable aluminum casing, providing electrical protection and excellent noise immunity;

Built in surge and transient protection circuits to protect power, communication, and I/O ports.

MEx series model comparison table:

Model universal output UO universal input UI

MEx48u 4 8

MEx88u 8 8

MEx016u 0 16

MEx816u 8 16

MEx816u: 8-channel universal output, 16 channel universal input, is the key model introduced in the document.

Communication

Bus: Xnet I/O expansion bus, communication rate of 500 Kbps, used for data exchange between ME main controller and expansion module;

Compatibility: Compatible with older Mx I/O expanders (using only 9-pin Sub-D connectors);

Status indicator lights: Power supply, Run operation, Error fault, Xnet TX transmission, Xnet RX reception;

Module address: Rotate the DIP dip switch to set the module network address.

Universal inputs

14 bit ADC analog-to-digital conversion, configurable for multiple signal types:

Voltage: 0-5 Vdc, 0-10 Vdc;

Current: 0-20 mA;

Sensor: 10k Type II thermistor; 1k Ω RTD (platinum, nickel Balco）；

Dry contact switch quantity;

Pulse counting function: maximum 40Hz pulse, minimum pulse width 12.5ms.

Universal outputs

Configure output mode through jumper:

Analog output: 0-10V DC, 0-20mA DC (12 bit DAC digital to analog conversion);

Relay drive output: 24V DC, 50mA;

Each output is equipped with a HOA (manual/off/automatic) dip switch, with a potentiometer that can manually adjust the analog output value.

Installation method

Direct Stacking: The first MEx module can be directly installed on top of the ME812u controller;

Panel stacking installation: Multiple modules are stacked inside the control cabinet;

Remote panel installation: up to 100 feet away, connected to the main controller via Xnet bus;

System limit: Up to 5 MEx expansion modules.

Electrical specifications

power supply

Communication: 24VAC ± 10%, 50-60Hz, 45VA;

DC: 26VDC ± 10%, 21W;

Note: External accessories such as BACview6 will increase power consumption.

Environmental working conditions

Working temperature: -29 ℃~+60 ℃ (-20 ℉~140 ℉);

Relative humidity: 10-90% RH, no condensation.

Certification: UL916 (Canadian Standard C22.2 No.205-M1983), CE, FCC Part 15 Class B Grade A.

Physical parameters

Shell: sturdy aluminum shell, detachable screw terminal block;

Overall dimensions: Width 121   mm (4-3/4 "), Height 229   mm (9"), Depth 38   mm (1-1/2 ");

Installation hole size: Width 70   mm (2-3/4 "), Height 216   mm (8-1/2");

Weight: 1.4 pounds.

Application scenarios

Used for building automation BA systems, paired with ME series controllers, to expand AI/DI/AO points; Support temperature sensors (RTD, thermistor), analog signal acquisition, dry contact input, pulse counting; Analog output, relay drive output; Support local control cabinet layout and remote device cabinet decentralized I/O acquisition.