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The I-7590 is specially designed for M-Bus slave device. It is a serial bus to M-Bus convertor. First, for serial bus, it offers RS-232, RS-422 and RS-485 three kinds of communication way. Second, the I-7590 has two rotary switches, one for serial port baud and the other for M-Bus port baud. Third, the I-7590 uses transparent transmission between serial bus and M-Bus communication. Through these three designs, it is easy to communicate with any standard M-Bus slave.
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| Applications |
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The M-Bus (Meter‐Bus) is a bus optimized for the reading of measurement instruments like: energy counters, hot and cold water counters, gas, pressure, sensors and actuators, etc….
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| Features |
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- Serial Baud and M-Bus Baud can be configured separately
- Provides 10 kinds of Baud for default, 6 kinds of Baud for user-defined
- Supports up to 100 M-Bus slaves
- Provides transparent communication
- Watchdog inside
- Bias resistors of RS-422 and RS-485 adjust by switch
- Allows updating firmware by the RS-232 port
- Overcurrent and short-circuit protection on the M-Bus port
- 3750 Vrms photocouple isolation on the M-Bus port
- ±4 kV ESD to contact
- Reverse polarity protection on power
- Provide 3 LED indicators, PWR LED, MTX LED and MRX LED
- Dimensions: 72mm x 122mm x 33mm (W x L x H)
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| Baud Rate Selection by Rotary Switch |
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| Switch Value |
0 |
1 |
2 |
3 |
4 |
5 |
| Baud [bps] |
300 |
600 |
1200 |
2400 |
4800 |
9600 |
| Switch Value |
6 |
7 |
8 |
9 |
A ~ F |
| Baud [bps] |
19200 |
38400 |
57600 |
115200 |
User-defined |
The data format of serial bus baud rate of switch value 0 ~ 9 is 8, n, 1.
The data format of M-Bus bus baud rate of switch value 0 ~ 3 is 8, e, 1. |
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| Execution Mode by DIP Switch |
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| DIP 1 (Init) |
DIP 2 (Mode) |
Description |
| OFF |
OFF |
Run Firmware |
| OFF |
ON |
Configure |
| ON |
OFF |
Update Firmware |
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| Utility |
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- Provide M-Bus user-defined baud rate
- Provide serial bus user-defined baud rate
- Check firmware version
- Update firmware
 
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| I-7590 Support Meter |
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The following meters have been tested with the I-7590 communication:
| Manufacture |
Picture |
Model Type |
Meter Type |
| Danfoss |
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SONOMETER 500 |
Heat Meter |
| SENSUS |
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405S |
Water Meter |
| WESER |
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PUL |
Heat Meter |
| DIEHL |
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ALTAIR V4 |
Water Meter |
| Wason |
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LXZD-Y3 |
Water Meter |
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| Hardware Specifications |
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| M-Bus Interface |
| Channel number |
1 |
| Baud Rate (bps) |
Adjustable M-Bus bus baud rate from 300 bps to 2400 bps or configurable user-defined baud rate |
| Data bit |
5, 6, 7, 8 |
| Stop bit |
1, 2 |
| Parity |
None, Even, Odd, Space, Mark |
| Isolation |
3750 Vrms for photo-couple |
| ESD Protection |
Contact ±4 kv class B |
| Current Protection |
short-circuit protection |
| UART Interface |
| Channel number |
1, RS-232 / RS-422 / RS-485 (can't be used simultaneously) |
| Baud Rate (bps) |
Adjustable M-Bus bus baud rate from 300 bps to 115200 bps or configurable user-defined baud rate |
| Data bit |
5, 6, 7, 8 |
| Stop bit |
1, 2 |
| Parity |
None, Even, Odd, Space, Mark |
| ESD Protection |
Contact ±4 kv class B |
| Bias Resistor |
Adjustable by switch for RS-422 and RS-485 |
| Power |
| Power supply |
Unregulated +10 ~ +30 VDC |
| Protection |
Power reverse polarity protection, Over-voltage protection |
| Power Consumption |
1.8 W @ 24 VDC (with 1 slave device), 11.8 W @ 24 VDC (with 100 slave devices) |
| Mechanism |
| Installation |
DIN-Rail |
| Dimensions |
72mm x 122mm x 33mm (W x L x H) |
| Environment |
| Operating Temp. |
-25 ~ 75 ℃ |
| Storage Temp. |
-30 ~ 80 ℃ |
| Humidity |
10 ~ 90% RH, non-condensing |
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| Ordering Information |
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RS-232 / RS-422 / RS-485 to M-Bus Convertor (RoHS) |
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| Optional Accessories |
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| CA-0910 |
9-pin Female D-sub & 3-wire RS-232 cable (1M) |
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| TOP |
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