	R2+ NM	R2+	R2A+	R2A+ NM
Communications
8 Digital Inputs and 1 Digital Relay Output	✔	✔	✔	✔
2 Analog Inputs			✔	✔
Ethernet Port	✔	✔	✔	✔
Modbus TCP/IP	$	$	$	$
RS-422/485/232 Serial Port			✔
Notifications
Direct Email Alerts (no Cloud)	✔	✔	✔	✔
Direct SMS/Text Alerts(no Cloud)		✔	✔
Enhanced Voice Alerts		$	$
Protocols
MQTT / SparkplugB Protocols	✔	✔	✔	✔
Modbus TCP	$	$	$	$
VPN - Open VPN Compatible	✔	✔	✔	✔
Features
Remote Access & Browser Based Configuration	✔	✔	✔	✔
Unlimited Programmable Alarms & Contacts	✔	✔	✔	✔
Unlimited Reporting Functionality	✔	✔	✔	✔
Hardware
Cellular Modem with SIM card		✔	✔
DIN Rail Mounting	○	○	○	○
Datasheet