DatasheetThe Modbus Universal AI/DI Module is intended to be used with a wide range of industrial sensors. All parameter can be set via Modbus RTU Interface. A subset of the most common settings is available via DIP switches.
The measuring value can be read over the Modbus RTU (RS485) interface.
The 2-way isolation guarantees reliable decoupling of the sensor circuit from the Processing circuit and the auxiliary power circuit. Auxiliary power and Modbus RTU can be connected via the connection terminals or via the In-Rail-Bus connector (see accessories).
Product line
| Device Type | Order No. |
|---|---|
| Modbus Universal AI/DI Module, In-Rail-Bus for power supply and Modbus connection |
DMB 96500 B |
Technical Data
Input
| Sensor / input signal | Measuring error | TC1) |
| Pt100 | 0.1 K + 0.05 % m.v. | 0.02 K/°C |
| Pt200 | 0.3 K + 0.05 % m.v. | 0.02 K/°C |
| Pt500 | 0.2 K + 0.05 % m.v. | 0.02 K/°C |
| Pt1000 | 0.1 K + 0.05 % m.v. | 0.02 K/°C |
| Pt2000 | 0.2 K + 0.05 % m.v. | 0.02 K/°C |
| Pt10000 acc. IEC 60751 | 0.2 K + 0.05 % m.v. | 0.06 K/°C |
| JPt50 (TC3916) acc. JIS C 1604 | 0.2 K + 0.05 % m.v. | 0.03 K/°C |
| JPt100 (TC3916) acc. JIS C 1604 | 0.1 K + 0.05 % m.v. | 0.02 K/°C |
| Ni100 | 0.1 K + 0.05 % m.v. | 0.02 K/°C |
| Ni120 | 0.1 K + 0.05 % m.v. | 0.02 K/°C |
| Ni200 | 0.1 K + 0.05 % m.v. | 0.02 K/°C |
| Ni500 | 0.5 K + 0.05 % m.v. | 0.02 K/°C |
| Ni1000 | 0.25 K + 0.05 % m.v. | 0.02 K/°C |
| KTY (66 types) | 0.1 K + 0.05 % m.v. | 0.02 K/°C |
| Measuring rate Pt, Ni, KTY | 4 /s | |
| Resistor 500 Ω, 5 kΩ, 20 kΩ, 100 kΩ | 0.05 % full scale | 100 ppm/K |
| Potentiometer 500 Ω, 5 kΩ, 20 kΩ, 100 kΩ | 0.05 % | 100 ppm/K |
| Measuring rate resistance / Pot | 25 /s | |
| Cable resistance | < 100 Ω, programmable for 2-wire | |
| Connection / Sensor current | 2-, 3-, 4-wire / 0.2 mA, 10 µA | |
| TC sensor type A | 0.5 K + 0.08 % m.v. | 0.1 K/°C |
| TC sensor type B | 0.5 K + 0.08 % m.v. | 0.15 K/°C |
| TC sensor type C | 0.5 K + 0.08 % m.v. | 0.1 K/°C |
| TC sensor type D | 0.5 K + 0.08 % m.v. | 0.1 K/°C |
| TC sensor type E | 0.5 K + 0.08 % m.v. | 0.05 K/°C |
| TC sensor type J | 0.5 K + 0.08 % m.v. | 0.05 K/°C |
| TC sensor type K | 0.5 K + 0.08 % m.v. | 0.05 K/°C |
| TC sensor type L | 0.5 K + 0.08 % m.v. | 0.05 K/°C |
| TC sensor type N | 0.5 K + 0.08 % m.v. | 0.05 K/°C |
| TC sensor type R | 0.5 K + 0.08 % m.v. | 0.1 K/°C |
| TC sensor type S | 0.5 K + 0.08 % m.v. | 0.1 K/°C |
| TC sensor type T | 0.5 K + 0.08 % m.v. | 0.05 K/°C |
| TC sensor type U | 0.5 K + 0.08 % m.v. | 0.05 K/°C |
| Measuring rate | 4 /s | |
| Cold junction compensation | internal, external Pt100 / Pt1000, programmable, uncompensated Error of Cold junction internal < 1.5 K |
|
| Current ±1 mA, ±20 mA, ±100 mA | 0.05 % full scale | 100 ppm/K |
| Voltage ±1 V, ±10 V, ±100 V, ±300 V | 0.05 % full scale | 100 ppm/K |
| mV-Shunt ±50 mV, ±100 mV, ±500 mV | 0.05 % full scale | 100 ppm/K |
| Measuring rate Current / Voltage | 100 /s | |
| Input resistance | Voltage: > 100 kΩ, Current: < 55 Ω | |
| Measuring modes | DC, Average, RMS | |
| Additional measuring error in RMS mode (40 Hz to 500 Hz) |
2 % m.v. | |
| Frequency ≤ 1 Hz (gate time 1000 s) | 0.1 % full scale | 100 ppm/K |
| Frequency ≤ 10 Hz (gate time 100 s) | 0.1 % full scale | 100 ppm/K |
| Frequency ≤ 100 Hz (gate time 10 s) | 0.1 % full scale | 100 ppm/K |
| Frequency ≤ 1 kHz (gate time 1 s) | 0.1 % full scale | 100 ppm/K |
| Frequency ≤ 10 kHz (gate time 100 ms) | 0.1 % full scale | 100 ppm/K |
| Frequency ≤ 200 kHz (gate time 10 ms) | 0.1 % full scale | 100 ppm/K |
| PWM ≤ 1 Hz (gate time 1000 s) | 0.1 % full scale | 100 ppm/K |
| PWM ≤ 10 Hz (gate time 100 s) | 0.1 % full scale | 100 ppm/K |
| PWM ≤ 100 Hz (gate time 10 s) | 0.1 % full scale | 100 ppm/K |
| PWM ≤ 1 kHz (gate time 1 s) | 0.1 % full scale | 100 ppm/K |
| PWM ≤ 10 kHz (gate time 100 ms) | 0.1 % full scale | 100 ppm/K |
| PWM measuring range | 1 … 99 % | |
| Input signal | NAMUR, SN, NPN, PNP, Push-Pull, S0-Switch type B | |
| Push-Pull voltage level | 3.3 … 5 V | |
| NPN-Pullup | 3.2 kΩ, always active | |
| PNP-Pulldown | 11 kΩ, always active | |
Modbus
| Protocol | Modbus RTU (RS485) |
| Module addressing | 1 to 247 |
| Response delay | 1 to 1000 ms, programmable |
| Baud rate | 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 |
| Configuration | Parity: Even, Odd, None with 2 stop bits, None with 1 stop bit |
| Connectivity | Up to 247 DRAGO Modbus devices without additional repeater (1/8 Load) |
| Indication | Yellow LED on front panel |
| Measurement range | 0 to 115 % (current and voltage modes) |
General Data
| Test voltage | 3 kV AC, 50 Hz, 1 min., Input 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 currents2) |
Protective Separation by reinforced insulation acc. to 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 to +70 °C (-13 to +158 °F) Transport and storage: -40 °C to +85 °C (-40 to +185 °F) |
| Power supply | 24 V DC, 16.8 V to 31.2 V DC, approx. 1.3 W |
| EMC3) | 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) |
Solid: 0.5 mm2 – 4 mm2 / AWG 20-12 Fine-stranded: 0.5 mm2 – 2.5 mm2 / AWG 20-14 Stripped length: 6-8 mm / 0.28 in Screw terminal torque 0.8 Nm / 7 lbf in |
| Weight | Approx. 70 g |
- Average TC in specified operating temperature range, given in units of display error [K] per change in ambient temperature [°C]
- As far as relevant the standards and rules mentioned above are considered by development and production of our devices. In addition relevant assembly rules are to be considered by installation of our devices in other equipment. For applications with high working voltages, take measures to prevent accidental contact and make sure that there is sufficient distance or insulation between adjacent situated devices.
- Minor deviations possible during interference
Block diagram
Dimensions
Terminal assignments
- 1Input RTD / R / Pot / TX+ / Namur+
- 2Input RTD / R / Pot / U+ /
- 3Input RTD / R / Pot / TX- / I+ / TC+ / mV+
- 4Input RTD / R / Pot / U- / I- / TC- / mV-
- 5Modbus A (connected to In-Rail-Bus A)
- 6Modbus B (connected to In-Rail-Bus B)
- 7 +Power supply 24 V DC
(connected to In-Rail-Bus D) - 8 −Power supply 24 V DC
(connected to In-Rail-Bus C) - AModbus A
- BModbus B
- C −Power supply 24 V DC
- D +Power supply 24 V DC