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Davicom MEXM-1

Expansion unit with 24 metering inputs, 24 status inputs and 24 relay outputs


Want to multiply your Davicom’s input and output points? The MEXM-1 will help you do that! 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 Davicom’s powerful control, monitoring and automation functions.

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
• 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

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