The Modbus module with 6 analog inputs and 2 relay outputs was developed for decentralized switching tasks. Suitable to monitor electrodes of leakage sensors or the fill level of fluid containers and to switch pumps or magnetic valves. In this case it is necessary to protect the relay contacts by appropriate load-dependent measures. The resistance of the conductive fluid is measured when the electrodes are immersed. It is also possible to signal a cable break (requires sensor LKS-ZD). The module can be operated independently or via a Modbus master. Inputs and outputs can be switched and scanned via standard registers. Module address, bit rate and parity are set with two rotary switches on the front or by software. Suitable for decentralized mounting on DIN TH35 rail according to IEC 60715 in electrical distribution cabinets.
- Connection with screw type terminal blocks
Resources
Specifications
General Data | Protocol | Modbus RTU |
| Address range | 00 to F9 |
| Bus interface | RS485 (two-wire bus) |
| Transmission rate | 1200 to 115200 bit/s |
| Operating voltage | 24 V AC/DC +/- 10 % (SELV) |
| Current consumption | 80 mA (AC) / 43 mA (DC) |
| Relative duty cycle | 100 % |
| Input / contacts 1 to 6 | connection of the electrodes |
| Input / contacts C | common reference potential |
| Internal resistance | 20 kOhm |
| Sinus voltage | 3 Veff, 70 Hz at resistance measurement |
| Measuring accuracy | +/-10 % with sensor resistance 4 to 40 kOhm; +/-20 % with sensor resistance 2 to 100 kOhm |
| Pulse voltage | +/-16 V at wire break monitoring |
| Zener diodes | 6.2 to 10 V can be used as line termination |
| Lines capacity | 40 nF max. equates 400 m at 100 nF/km |
| Measuring interval | 1.5 s |
| Output / contacts | 2 NO contacts (SPST-NO) |
| Output / switching voltage | 250 V AC |
| Output / continuous current | 6 A / output |
| Display | Green, red and yellow LED |
| Dimensions (W x H x D) | 50 x 69.3 x 60 mm |
| Weight | 126 g |
| Operating temperature range | -5 °C to 55 °C |
| Storage temperature range | -20 °C to 70 °C |
| Ingress protection for housing / terminal blocks | IP40 / IP20 |
