DatasheetThe Modbus 4 Channel Analog Module provides four fully isolated, independently configurable channels.
Two inputs can be configured as current or voltage inputs. In addition, these can be configured as digital inputs or digital outputs (open collector).
Two outputs can be configured as current or voltage outputs. In addition, these can be configured as digital outputs (active logic 0/10 V).
All parameters can be set via the Modbus RTU interface and via a programming socket behind the front panel. A free PC configuration software also offers extended setting options and extensive diagnostic functions during operation. A subset of the most common settings is also available via DIP switches.
The 5 port isolation ensures reliable decoupling of the channels from each other and from the processing circuit and the power supply. Power supply and Modbus RTU are connected via the rearmounted In-Rail-Bus connection (see Accessories)
Product line
| Device Type | Order No. |
|---|---|
| Modbus 4 Channel 2AI/2AO Module | DMB 96400 B |
Technical Data
Inputs AI
| Voltage | Current | |
| Input signal | 0 to 10 V | 0 to 20 mA |
| Input resistance | ≥ 100 kΩ | ≤ 25 Ω |
| Overload | ≤ 30 V | ≤ 100 mA |
| Additional function | DI: 12/24 V (L< 2.0 V H > 8.4 V) DO: Open collector switching output, ≤ 30 V / ≤ 100 mA (drop voltage ca. 2V) |
|
Output AO
| Voltage | Current | |
| Output signal | 0 to 10 V | 0 to 20 mA |
| Load | ≤ 5 mA (2 kΩ at 10 V) | ≤ 12 V (600 Ω at 20 mA) |
| Residual ripple | < 10 mVrms | |
| Additional function | DO: active switching output 0/10 V | |
Modbus
| Protocol | Modbus RTU (RS485) | |
| Module addressing | 1 to 247 | |
| Response delay | 1 to 1000 ms | |
| Baud rate | 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 | |
| Configuration | Parity: Even, Odd, None 2 stop bit, None 1 stop bit | |
| Connectivity | Up to 247 DRAGO Modbus devices without additional repeater (1/8 Load) | |
General Data
| Measuring error | < 0.1 % full scale |
| Temperature coefficient1) | < 100 ppm/K |
| Resolution | 14 bit |
| Test voltage | 3 kV AC, 50 Hz, 1 min. All channels against each other and against Modbus/power supply |
| Working voltage2) (Basic insulation) |
600 V AC/DC for overvoltage category II and pollution degree 2 acc. to EN 61010-1 |
| Protection against dangerous body currents1) |
Protective Separation by reinforced insulation acc. to DIN EN 61010-1 up to 300 V AC/DC for overvoltage category II and contamination class 2 between input and Modbus/power supply |
| Ambient temperature | Operation: -25 °C bis +70 °C (-13 bis +158 °F) Transport and storage: -40 °C to +85 °C (-40 to +185 °F) |
| Power supply | 24 V DC, voltage range 16.8 V to 31.2 V DC, max. 1.0 W via In-Rail-Bus (see Accessories) |
| EMC2) | EN 61326-1 |
| Construction | 6.2 mm (0.244″) housing, protection type: IP 20, mounting on 35 mm DIN rail acc. to EN 60715 |
| Connection Captive plus-minus clamp screws |
Wire cross-section 0.5 to 2.5 mm² / AWG 20-14 Stripped length: 8 mm / 0.3 in Screw terminal torque 0.6 Nm / 5 lbf in Power connection via In-Rail-Bus (see accessories) |
| Weight | Approx. 70 g |
- Average TC related to full scale value in specified operating temperature range, reference temperature 23 °C
- For applications with high working voltages, ensure there is sufficient spacing or isolation from neighboring devices and protection against electric shocks.
- Minor deviations possible during interference
Block diagram
Dimensions
Terminal assignments
- 1+U / −I … Input 1
- 2-U / +I
- 3+U / −I … Input 2
- 4-U / +I
- 5 +Output 1
- 6 −Output 1
- 7 +Output 2
- 8 −Output 2
- AModbus A
- BModbus B
- C −Power supply 24 V DC
- D +Power supply 24 V DC
