Davicom MEXM-1 Expansion Unit

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davicom_mexm-1

Summary

A MEXM-1 adds…
24 Metering inputs
24 Status input
24 Relay outputs
… to any Davicom unit*

Maximum total I/O count for different types of Davicom units by daisy-chaining MEXM-1 units together:

DV-Micro DV-Mini
Metering Status Relay Metering Status Relay
Maximum 136 200# 80 136 208# 80

 

DV-208 DV-216
Metering Status Relay Metering Status Relay
Maximum 136 208# 88 144 224# 104

Each MEXM-1 scans all its inputs and outputs at a 10Hz rate for fast detection and control.

# In Modbus RTU mode, subtract 24 Status inputs.

* Requires Davicom firmware version 5.52 or later. Download latest firmware now by registering as a member on davicom.com.

Features

Daisy chain MEXM-1 units together and:

  • Add up to 128 extra Metering inputs to any one of your Davicom units
  • Add up to 192 extra Status inputs to any one of your Davicom units
  • Add up to 72 Relay outputs to any one of your Davicom units

For example, adding a single MEXM-1 to a DV-Micro yields a total of 32 metering inputs, 32 status inputs and 32 relay outputs for a very low price. These extra I/O’s are directly integrated into the DV-Micro’s control structure, therefore taking full advantage of the unit’s powerful control, monitoring and automation functions.

Technical Specification

Technical Specification

MEXM-1 Specifications
Metering inputs Number

24

Voltage ranges

±2.5, ±5, ±10, ±25, ±50 VDC

Impedance

1 MOhms

Protection

Clamping diode

Accuracy

1%

A/D resolution

12 bits

Connector type

Weidmuller pluggable screw terminal

Status Inputs Number

24

Logic levels

High=+2.4 to +12VDC, Low=-12 to +0.8VDC. EIA compatible

Impedance

>22kOhms

Protection

Optoisolated

Ground

Internal or External, individually selectable

Dry/wet contact

Individually selectable with pull-up resistor

Connector type

Weidmuller pluggable screw terminal

Outputs Number

24

Type

Form C Relay or Open collector, individually selectable

Rating
70VAC @ 0.4A, 30VDC @ 2A.
Open collector at 100mA
Connector type

Weidmuller pluggable screw terminal

Interface protocol Modbus

RTU or TCP modes

RTU Mode Connector

USB, RJ-9 for a daisy chain (up to 7 units)

TCP Mode Connector

RJ-45 (up to 8 units)

Power Supply

12 VDC

Typical current requirements at 12VDC Idle

150 mA

Startup

150 mA

Max (all relays energized)

480 mA

Dimensions
48.3 x 8.7 x 3.6 cm, 19″ x 3.44″ x 1.42″
(including Weidmuller terminals)
Weight (unit only)

1.3 kg

Product Resources

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