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RS232 Isolator

Der CSP-RS232I stellt eine galvanische Trennung für die Anbindung von Fremdgewerken (Alarmanlagen, Schwimmbadtechnik…) dar. Der RS232 Isolator schützt die angebundenen Anlagen bei Kurzschlüssen oder Überspannung bis 4,5KV RMS in einem Anlagenteil und gleicht unterschiedliche Spannungspotentiale aus. Der Isolator überträgt keine RS-422/485 Befehle. Wir empfehlen bei der Anbindung von Fremdsystemen einen CSP-RS232I vorzusehen.

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[1]
  • Passes RX, TX, RTS, and CTS signals
  • 4.5 Kilovolt RMS galvanic isolation


  1. Supports RS-232 only; does not support RS-422 or RS-485.

Crestron and Cresnet are trademarks of Crestron Electronics, Inc. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Crestron disclaims proprietary interest in the marks and names of others.

  Isolation 4.5 KilovoltsRMS for 1 minute
  DEVICE (1) DB9 male, isolated bidirectional RS-232 pass-thru port[1];
Passes RX, TX, RTS, and CTS signals;
Supports 300 to 115.2k baud
  Ground (1) 6-32 screw, chassis ground lug
  CONTROL SYSTEM (1) DB9 female;
Connection to any Crestron COM port[1];
6 ft (1.83 m) interface cable included
  PWR 24VDC (1) 2-pin 3.5mm detachable terminal block;
24 Volt DC power input;
May be connected to Cresnet or dedicated power supply (not included)
  PWR 12VDC (1) 2.5mm barrel DC power jack;
12 Volt DC power input;
(PW-1205 or PWI-1215 power pack sold separately)
LED Indicators
  PWR (1) green LED, indicates power supplied via Cresnet network or local power pack
Power Requirements
  Power Pack 0.5 Amp @ 12 Volts DC;
120 Volts AC, 60 Hz power pack, model PW-1205; or 230 Volts AC, 50 Hz power pack, model PWI-1215; sold separately
  Cresnet Power Usage 1 Watt (0.04 Amp @ 24 Volts DC) with no power pack connected
  Temperature 32° to 158°F (0° to 70°C)
  Humidity 10% to 90% RH (non-condensing)
  Heat Dissipation 3 BTU per hour
  Steel, surface mount box with (2) integral mounting flanges, printed label
  Height 1.34 in (34 mm)
  Width 4.52 in (115 mm)
  Depth 3.76 in (96 mm)
  9.1 oz (257 g)


Spec Sheet

Spec Sheet (PDF)

Installation and Operations Guide

Installation And Operations Guide (PDF - 1.1 M)
Doc. No. 6634A
Rev. Date: 2/1/2008

CADs, Drawings and Revit Files

Zoomable Drawing

Zoomable Drawing

Cad Files

Cad Files (ZIP - 1.2 M)
Rev. Date: 9/25/2007

Available Models

Model Description      


RS-232 Isolator





Available Accessories

Model Description      


Custom Serial Interface Cable





Power Pack, Wall, 12VDC, 0.5A, 120VAC





Power Pack, Desktop, 12VDC, 1.5A, 230VAC




Invitation to Tender

CSP-RS232I (TXT - 732 B)
Letzte Änderung 11.11.2012