4 data line entry surge protector, RS-422/485, 4 kV surge protection, -40 to 85°C operating temperature
4 data line advanced surge protector, RS-422/485, 20 kV surge protection, -40 to 85°C operating temperature
4 data line advanced surge protector, RS-232, 20 kV surge protection, -40 to 85°C operating temperature
7 data line entry surge protector, RS-232, 4 kV surge protection, -40 to 85°C operating temperature