RS-485/RS-422/RS-232 Surge Protection

What level of surge protection do Comtrol products provide?

In order to properly accommodate installation in harsh operating environments, all Comtrol DeviceMaster device servers and RocketPort multiport card serial connectivity products incorporate on-board protection from transient electrical surges produced by electrostatic discharge (ESD). This built-in protection is equivalent to a minimum of 10KV at 200 Amps for a duration of 1 nanosecond for RocketPort cards and 15KV at 200 Amps for a duration of 1 nanosecond for DeviceMaster products. Comtrol's extensive experience designing serial communication products has shown 10 - 15KV ESD protection to be the optimal price/performance level for most operating conditions. To address the needs of customers requiring installations in the most extreme conditions, Comtrol offers Surge Interfaces for card products and "special order" DeviceMaster device server models with enhanced surge protection up to 25KV at 400 Amps current for a 10-nanosecond duration.

Surge Protection Specifications

The following table details surge protection ratings for Comtrol DeviceMaster device servers and RocketPort multiport serial card products.

Products	Voltage	Current (Amperage)	Duration (nanoseconds)
DeviceMaster AIR	15 KV	200 A	1 ns
DeviceMaster PRO	25 KV	400 A	10 ns
DeviceMaster RTS	15 KV	200 A	1 ns
DeviceMaster RTS	25 KV	400 A	10 ns
DeviceMaster RTS VDC	15 KV	200 A	1 ns
DeviceMaster Serial Hub	15 KV	200 A	1 ns
DeviceMaster Universal Protocol	15 KV	200 A	1 ns
RocketModem IV	15 KV	200 A	1 ns
RocketPort cards using RocketPort Interface	10 KV	200 A	1 ns
RocketPort cards using RocketPort Interfaces (unity chip)	15 KV	200 A	1 ns
RocketPort cards using RocketPort Interfaces (unity chip)	25 KV	400 A	10 ns
RocketPort cards using RocketPort Rackmount Interfaces	10 KV	200 A	1 ns
RocketPort cards using RocketPort Surge Interfaces	25 KV	400 A	10 ns
RocketPort EXPRESS	15 KV	200 A	1 ns
RocketPort INFINITY	15 KV	200 A	1 ns
RocketPort Jet	15 KV	200 A	1 ns
RocketPort Plus Universal PCI	25 KV	400 A	10 ns
RocketPort Plus Universal PCI 422	25 KV	400 A	10 ns
RocketPort Universal PCI	15 KV	200 A	1 ns
RocketPort USB Serial Hub II	4 KV	200 A	1 ns
RocketPort USB Serial Hub III	4 KV	200 A	1 ns

* All DeviceMaster Ethernet components and RocketModem modem chips are rated to 1.5KV magnetic surge protection, in addition to the surge protection levels listed.