This document was prepared and written by the Technical Documentation department at: Crestron Electronics, Inc.
Crestron ST-COM RS-232/422/485 COM Module Contents RS-232/422/485 COM Module: ST-COM 1 Description................................................................................................................................. 1 Functional Description ................................................................................................ 1 Physical Description.................................................................................................... 2 Leading Specifications...........
Crestron ST-COM RS-232/422/485 COM Module RS-232/422/485 COM Module: ST-COM Description Functional Description There are two Crestron RS-232/422/485 COM module configurations available: ST-COM and STI-COM. All of the features are identical with the exception of input power requirements and unit nomenclature. The ST-COM uses a power pack rated for 120 VAC supply and the STI-COM uses a power pack rated for 220 VAC. Use of the power packs are optional within a Cresnet system.
RS-232/422/485 COM Module Crestron ST-COM mutually exclusive in the ST-COM. If both are enabled, RTS/CTS is used. If CTS handshaking is enabled, the CTS line is monitored by the ST-COM. The CTS line can also be enabled as a digital input to the control system; the RTS line can be enabled as a digital output. • Specify RS422 for standard if RS-422 compatible levels must be supported. • Break statement is generated for as long as the signal is held high.
Crestron ST-COM RS-232/422/485 COM Module ST-COM Ports A number of ports are provided on the back of the ST-COM. Each has a silkscreened label. Refer to illustration and descriptions below. ST-COM Ports 12 VDC .5A This direct current (DC) power socket connector is used to supply power via the external power pack, when attached. If the power pack is used while 24 VDC is present on the NET connector, the power pack supplies power to the unit (no current is drawn from the network).
RS-232/422/485 COM Module Crestron ST-COM COM A/B These two nine-pin connectors (DB9) connect to serial equipment. These bidirectional serial ports are used for RS-232, RS-422, or RS-485 communication. NOTE: The pinout of each nine-pin port is non-standard (refer to table after this note); it contains RS-422 pins in addition to RS-232. This may result in a conflict with some equipment and therefore do not use all nine pins. Only the required pins for each communication type should be connected.
Crestron ST-COM RS-232/422/485 COM Module ST-COM Indicators There are 10 LED indicators located on the front panel of the ST-COM. Refer to illustration below and descriptions that follow. ST-COM Indicators PWR (Power) This LED illuminates when 12 volts (from power pack) or 24 volts DC (from network) is supplied to the ST-COM. NET This LED illuminates when communication between the ST-COM and either the SmarTouch STS or Cresnet system is established.
RS-232/422/485 COM Module Crestron ST-COM Leading Specifications of the ST-COM SPECIFICATION Power Requirements: Default NET ID TM ® SIMPL Windows ST-COM Firmware CEN/CN-TVAV Update File CNMSX-AV/Pro Update File CNRACKX/-DP Update File ST-CP Update File CNMS, CNRACK, CNLCOMP Operating System Rack Space Required (optional with ST-RMK) Dimensions & Weight DETAILS 12VDC, external power pack or 2.5 Watts (24VDC @ 0.104A), network 20 1 Version 1.18.01 or later 2 Version 1.54 or later 3 Version 51205V.
Crestron ST-COM RS-232/422/485 COM Module Setup Identity Code Every equipment and user interface within the network requires a unique identity code (NET ID). These codes are recognized by a two-digit hexadecimal number from 03 to FE. The NET ID of each unit must match an ID code specified in the SIMPL Windows program. The NET ID of each ST-COM has been factory set to 20.
RS-232/422/485 COM Module Crestron ST-COM SmarTouch STS Hookup Connections for ST-COM NOTE: USE 2 FOOT SUPPLIED CABLE (CA15717) OR EQUIVALENT (EXTENDED LENGTH) TO CONNECT ST-COM TO SMARTOUCH STS. SMARTOUCH STS (ST-CP) POWER PACK (500 mA) (1000 mA for STI-COM) SERIAL DEVICE SERIAL DEVICE DAISY CHAIN TO ADDITIONAL STS MODULES Cresnet System Hookup Connections for ST-COM NOTE: IF RJ-TYPE NET CONNECTOR IS AVAILABLE, USE IT.
Crestron ST-COM RS-232/422/485 COM Module Firmware Upgrade To upgrade the firmware of a ST-COM, a local PC that contains the Crestron Viewport (available in SIMPL Windows or VT Pro-e) is required. To connect the PC to the control system, refer to the "Obtaining Communications" section of the Operations Guide supplied with the appropriate control system.
RS-232/422/485 COM Module Crestron ST-COM "Port Settings" Window 6. From the Viewport menu, select Diagnostics | Report Network Devices (alternatively, depress F4), as shown in the diagram after this step. Accessing the Network Devices 10 • RS-232/422/485 COM Module: ST-COM Operations Guide - DOC.
Crestron ST-COM RS-232/422/485 COM Module 7. In the Viewport return display, observe the firmware version of the ST-COM. 8. Perform the appropriate step. 9. As shown after this step, select File Transfer | Load Network Device from the Viewport menu. Select Load Network Device 10. Select the NET ID of the ST-COM and then click OK, as shown in the diagram after this step. "Select Network ID" Window 11.
RS-232/422/485 COM Module Crestron ST-COM Select Firmware (UPG) NOTE: When the external power pack is disconnected from the ST-COM, operating power automatically switches to Cresnet power supplied via the NET connector(s). To remove power from the unit, make sure both the external power pack and NET connector(s) are removed. 12. Remove operating power from the ST-COM, wait several seconds and reconnect power. 13.
Crestron ST-COM RS-232/422/485 COM Module Configure ST-COM Program SYMBOL FOLDER Device Library, Control Systems Device Library, Network Control Modules SYMBOL DROP REQUIRED WHERE Desired control system ST-COM System Views System Views, Cresnet Units ADDITIONAL SETUP Refer to the documentation supplied with the specific control system for additional setup information. CHANGE NET ID (OPTIONAL) - Doubleclick on ST-COM (or single-click then right mouse-click) on ST-COM. Select Configure.
RS-232/422/485 COM Module Crestron ST-COM ST-COM Symbol Input Descriptions INPUT(S) [tx$] [enable] [break] [rts] str1 FUNCTION(S) More advanced signal processing can be done through serial strings and the tx$ input line on the symbol. If signal is present on this input, it must be high to permit activity of the the symbol. If the signal is low, the symbol is disabled. Some devices use a break character before sending out any serial data.
Crestron ST-COM RS-232/422/485 COM Module assignment is taken care of by the compiler. If the tx$ is defined, it can be driven by other string creation symbols (i.e., an Analog to Serial). If rx$ is defined, it can be routed to other string processing symbols (i.e. Serial Gather). Another typical usage would be if a macro were to drive the port, then the tx$ and rx$ would come from/go to the macro definition. Refer to help topics from the Help pull-down menu in SIMPL Windows.
RS-232/422/485 COM Module Crestron ST-COM Future Updates As Crestron improves functions, adds new features, and extends the capabilities of the ST-COM, additional information and programming examples may be made available as manual updates. These updates are solely electronic and serve as intermediary supplements prior to the release of a complete technical documentation revision. The Downloads page of the Crestron website (www.crestron.
Crestron ST-COM RS-232/422/485 COM Module Return and Warranty Policies Merchandise Returns / Repair Service 1. No merchandise may be returned for credit, exchange, or service without prior authorization from CRESTRON. To obtain warranty service for CRESTRON products, contact the factory and request an RMA (Return Merchandise Authorization) number. Enclose a note specifying the nature of the problem, name and phone number of contact person, RMA number, and return address. 2.
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Crestron Electronics, Inc. 15 Volvo Drive Rockleigh, NJ 07647 Tel: 888.CRESTRON Fax: 201.767.7576 www.crestron.com Operations Guide – DOC. 5695A 08.01 Specifications subject to change without notice.
