Summary
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 |
|
