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Model | EM731 | PM230 | PM822 | PM830 | PM834 | PMQ822 | PMQ830 | PMQ830L | PMQ830LG | PD822M | PD830M | PD840M |
Function | Modbus | Modbus | Modbus | Modbus | Modbus+Isolation | Modbus to MQTT | Modbus to MQTT | Modbus to MQTT | Modbus to MQTT | Modbus DIO | Modbus DIO | Modbus DI |
OS | RTOS Linux | uCLinux | OpenWrt Linux | OpenWrt Linux | OpenWrt Linux | OpenWrt Linux | OpenWrt Linux | OpenWrt Linux | OpenWrt Linux | OpenWrt Linux | OpenWrt Linux | OpenWrt Linux |
CPU | ARM Cortex M4 | ARM 7 | MIPS | MIPS | MIPS | MIPS | MIPS | MIPS | MIPS | MIPS | MIPS | MIPS |
CPU-Speed | 120 MHz | 80 MHz | 580 MHz | 580 MHz | 580 MHz | 580 MHz | 580 MHz | 580 MHz | 580 MHz | 580 MHz | 580 MHz | 580 MHz |
SDRAM | 256 KB | 8 MB | 128 MB | 128 MB | 128 MB | 128 MB | 128 MB | 128 MB | 128 MB | 128 MB | 128 MB | 128 MB |
Flash ROM | 1 MB | 4 MB | 32 MB | 32 MB | 32 MB | 32 MB | 32 MB | 32 MB | 32 MB | 32 MB | 32 MB | 32 MB |
Ethernet | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
WiFi 802.11 b/g/n | | | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Socket Connection | 1 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
RS232/RS422/RS485 | | 1 | | 2 | 4 | | 2 | 2 | 1 | | 1 | |
RS232 | 1 | | 1 | | | 1 | | | | 1 | | 1 |
RS422/RS485 | 1 | | 1 | | | 1 | | | | 1 | | 1 |
RS232/RS485 | | | | | | | | | 1 | | 1 | |
Data Logger | | | | | | | | V | V | | | |
4G | | | | | | | | | V | | | |
Digital Input | | | | | | | | | | 2 | 2 | 4 |
Digital Output | | | | | | | | | | 2 | 2 | |
Baud Rate | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K | 300 ~ 230.4 K |
Watchdog | V | V | V | V | V | V | V | V | V | V | V | V |
Utility / Web Page Setup | V | V | V | V | V | V | V | V | V | V | V | V |
Power Input | DC 9 ~ 30 V | DC 9 ~ 24 V | DC 9 ~ 32 V | DC 9 ~ 32 V | DC 9 ~ 32 V | DC 9 ~ 32 V | DC 9 ~ 32 V | DC 9 ~ 32 V | DC 9 ~ 32 V | DC 9 ~ 32 V | DC 9 ~ 32 V | DC 9 ~ 32 V |
DIN-Rail Mounting | V | V | V | V | V | V | V | V | V | V | V | V |
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