Crestron® RS-232 Isolator-CSP-RS232I

Model #: CSP-RS232I
At a Glance

Crestron® RS-232 Isolator with RX, TX, RTS, and CTS signals

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Provides protection of a Crestron RS-232 COM port against lightning surges and other electrical disturbances.

The CSP-RS232I is an accessory designed to protect a Crestron® control system's COM ports from lightning surges and other electrical disturbances brought through the RS-232 control line [1]. By electrically isolating any distant, outdoor device such as a pool & spa controller or irrigation system, the CSP-RS232I can prevent damage to the control system in the event of a near lightning strike, ground-loop, or short from a high voltage line.

Key Features

  • Recommended for lengthy or outdoor RS-232 cable runs
  • Protects control systems from lightning strikes and electrical disturbances
  • Supports RS-232 from 300 to 115.2k baud
  • Passes RX, TX, RTS, and CTS signals
  • 4.5 Kilovolt RMS galvanic isolation 


Connector Type:DB9; 3.5 mm

Misc. Specs

Depth (in.)3.76
Width (in.)4.52
Height (in.)1.34
Product Weight0.5700
WarningProposition 65 Warning for California Residents