Alpha-X combined I/O modules are designed to read logical states from external sensors and devices (combined inputs), and to switch or control external equipment using physical contacts and current or voltage signals (combined outputs).
Ideal for PLC I/O expansion, these modules communicate via RS-485 using Modbus RTU. This ensures native compatibility with ELHART PLCs and any third-party, Modbus RTU-compliant controllers.
Easily configure your devices with the free ELHART Configurator software.
Alpha-X DAIO 5/5P 2T/0 is designed for applications that need both temperature monitoring and digital logic. The module has 2 analog inputs for temperature sensors, also 5 digital inputs and 5 transistor-type digital outputs. Thermocouples (TCs) type J, K, L, B, S or resistance temperature detectors (RTDs) Pt100, Pt1000 can be connected to the analog inputs.
The basic error of analog input measurement does not exceed 0.25% FS. The module has 1500 V galvanic isolation between power and the RS-485 communication interface, analog and digital inputs and outputs.
Alpha-X DAIO 8/4R 2/0 features two channels for standard analog current and voltage signals: 0(4)…20 mA and 0…10 V. The basic error of analog signal measurement does not exceed 0.1% FS. Along with analog inputs, the module has 8 digital inputs and 4 relay outputs.
Analog signal values can be read in both integer and floating-point formats. In addition, the module features two 32-bit counters capable of handling input frequencies up to 4 kHz. Data from all channels is available via the RS-485 interface, Modbus RTU protocol.
| Modifications | DAIO 5/5P 2T/0 | DAIO 8/4R 2/0 |
|---|---|---|
| Maximum power consumption, W | 2.3 | 3.0 |
| Number of digital inputs | 5 | 8 |
| Number and type of analog inputs | 2 temperature |
2 analog |
| Number and type of outputs | 5 transistor, PNP |
4 relay |
| Digital input parameters | |
|---|---|
| Types of connected sensors | PNP / NPN |
| Maximum input switching frequency | 4 kHz |
| Maximum current consumption of one input | 6.5 mA |
| Logic 0 level (OFF) | 0…4 V |
| Logic 1 level (ON) | 11…28 V |
| Digital output parameters | ||
|---|---|---|
| Output type | transistor, PNP | relay |
| Minimum pulse time | 200 µs | - |
| Voltage drop | 0.7 V | - |
| Maximum allowable voltage | 28 VDC | 250 VAC, 30 VDC |
| Maximum current of one output | 0.25 A | 1 A |
| Maximum current of output group | 2 А | 2 А |
| Analog input parameters | ||
|---|---|---|
| Input type | analog | temperature |
| Supported signals | 0(4)…20 mA / 0…10 V (range can be adjusted) |
RTDs: Pt100, Pt1000 TCs: J, K, L, B, S |
| Basic error limit | 0.1% FS | 0.25% FS |
| Minimum polling time per input | 250 ms 70 ms (with notch filter disabled) |
0.32 s |
| Input resistance, current measurement in mA | 22 Ω | - |
| Input resistance, voltage measurement in V | 100 kΩ | - |
| Input resistance, voltage measurement in mV | - | > 1 MΩ |
| Cold junction temperature accuracy | - | ±2 °С |
| Lead resistance compensation for RTDs | - | 20 Ω |
| Parameter | Value |
|---|---|
| General | |
| Nominal supply voltage | 24 VDC (range 22…26 VDC) |
| Communication Interface | RS-485 |
| Supported protocols | Modbus RTU (Slave) |
| Interface baud rates | 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 76800, 115200, 128000, 256000 bit/s |
| Galvanic isolation of the interface | 1500 V |
| Ingress Protection | IP20 |
| Service life | 10 years |
| Operating conditions | |
| Operating temperature | -20…+50 °C |
| Relative humidity | 10...80% (without condensation) |
| Terminal | Description |
|---|---|
| B1 | Supply voltage, U (+) |
| B2 | Supply voltage, U (-) |
| B3 | Protective ground, GND |
| B4 | RS-485 interface, A (+) |
| B5 | RS-485 interface, B (-) |
