Modbus (MQTT) Gateway Models Comparison – Atac Technology Co., Ltd.

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