This document was prepared and written by the Technical Documentation department at: Crestron Electronics, Inc. 15 Volvo Drive Rockleigh, NJ 07647 1-888-CRESTRON 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............................................................................................................... 5 Setup .......................................................................................................................................... 7 Identity Code ............................................................................................................... 7 Preparation for Use...................................................................................................... 7 Firmware Upgrade....................................................................................................... 9 Programming with SIMPL Windows ...................................................................................... 12 Configure a ST-COM Program ................................................................................. 12 ST-COM Symbol ...................................................................................................... 13 Example Program ...................................................................................................... 14 Problem Solving ...................................................................................................................... 15 Troubleshooting......................................................................................................... 15 Further Inquiries ........................................................................................................ 15 Future Updates .......................................................................................................... 16 Future Firmware Upgrades........................................................................................ 16 Return and Warranty Policies .................................................................................................. 17 Merchandise Returns / Repair Service ...................................................................... 17 CRESTRON Limited Warranty................................................................................. 17 Operations Guide - DOC. 5695A RS-232/422/485 COM Module: ST-COM · i 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. For purposes of this Operations Guide, the term ST-COM is used for either configuration, except where noted. The ST-COM is a device with two independent bidirectional serial ports that can support RS-232, RS-485, or asynchronous RS-422-based communication. The unit enables a system to overcome the distance limitations of serial communication. It can be used as part of the Cresnet system or SmarTouch STS to add control for additional serial devices such as video projectors or AV switchers. If part of the Cresnet system, use of the power pack is optional. Both ports of the ST-COM may be used to control a wide variety of RS-232, RS-485, or asynchronous RS-422 controlled equipment. A variety of communications parameters are supported. Valid parameters are as follows. · Baud rates may be one of the following possible rates: 300, 1200, 1800, 2400, 3600, 4800, 6100, 7200, 9600, 14400, 19200, 28800, 38400, 57600, and 115200. When specifying the baud rate on a port, do not use commas. Parity may be even, odd, none, or zero stick (parity bit always 0). When specifying the parity use E, O, N, or Z, respectively. Data bits may be 7 or 8. Stop bits may be 1 or 2. Both XON/XOFF handshaking and RTS/CTS handshaking are supported. XON/XOFF handshaking may be supported by specifying XON (for both transmit and receive), XONR (for receive only), or XONT (for transmit only). XON/XOFF and RTS/CTS handshaking are · · · · Operations Guide - DOC. 5695A RS-232/422/485 COM Module: ST-COM · 1 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. Provides character pacing in units of milliseconds for all of the data specified. The range of the pacing is from 1 to 31 milliseconds. Pacing greater than 31 milliseconds defaults to the maximum (31 ms). Supports RS-485. However, additional drivers are required and specific protocol must be followed. The unit remains in receive mode until transmission is enabled with one character switching. Consult Crestron's award winning customer service team in your area. · Physical Description The ST-COM is housed in a black enclosure with silk-screened labels on the front and rear panels. On the front of the unit there are 10 LEDs for indicating the unit's current status. All connections are made on the back of the unit. Refer to the physical views shown below. There are four rubber feet on the base of the unit for stability and to prevent slippage. ST-COM Physical Views 1.500 in (3.810 cm) 6.134 in (15.580 cm) 6.322 in (16.058 cm) 6.940 in (17.628 cm) 7.066 in (17.948 cm) 1.700 in (4.318 cm) 2 · RS-232/422/485 COM Module: ST-COM Operations Guide - DOC. 5695A Crestron ST-COM ST-COM Ports RS-232/422/485 COM Module 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). Crestron recommends specific power packs for its devices. The acceptable power pack for the ST-COM is Crestron part number PW-1205 (PWI-1210 for the international version, STI-COM). If a power pack other than this Crestron model is obtained, verify that it meets the required specifications and polarity as shown below. Power Pack Specifications CRESTRON POWER PACK PW-1205 PWI-1210 Power Pack Output Connector Polarity INPUT SPECS 120V~60Hz 230V~50Hz OUTPUT SPECS 12VDC .5 A 12VDC 1A NET These two 6-pin, 6-position RJ11 modular jacks are used to connect the ST-COM module to either the SmarTouch STS or Cresnet remote control system. When the module is part of the Cresnet system, power is provided via the NET connection; the power pack need not be attached. Two NET ports are available so that network units can be daisy-chained together. Review the latest revision of the Network Modular Cable Requirements (Doc. 5682). NOTE: Most 4-conductor phone cables are wired in a crisscross fashion and are not compatible with Crestron equipment. NOTE: The ST-CP does not supply network power. Therefore, use the power pack to supply power to the ST-COM. If a power pack is attached when the module is part of the Cresnet system, power is drawn from the power pack. The module does not load the network power, but the network remains chained for additional network devices that are connected. Operations Guide - DOC. 5695A RS-232/422/485 COM Module: ST-COM · 3 RS-232/422/485 COM Module COM A/B Crestron ST-COM 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. NOTE: To support RS-485, tie pin 1 (RXD-) to pin 9 (TXD-) and pin 4 (TXD+) to pin 6 (RXD+) in the cable, as shown below. ST-COM Pinout (COM A / B) PIN 1* 2 3 4 5 6 7 8 9 DIRECTION To ST-COM To ST-COM From ST-COM From ST-COM To ST-COM From ST-COM To ST-COM From ST-COM DESCRIPTION (RXD-) RS-422 Receive Data (Idles low) (RXD) RS-232 Received Data (TXD) RS-232 Transmitted Data (TXD+) RS-422 Transmit Data (Idles high) RS-232 and RS-422 Signal Common (RXD+) RS-422 Receive Data (Idles high) (RTS) RS-232 Request to Send (CTS) RS-232 Clear to Send (TXD-) RS-422 Transmit Data (Idles low) * RS-422 transmit and receive are balanced signals requiring two lines plus a ground in each direction. RXD+ and TXD+ should idle high (going low at start of data transmission). RXD- and TXD- should idle low (going high at start of data transmission). If necessary, RXD+/RXD- and TXD+/TXD- may be swapped to maintain correct signal levels. 4 · RS-232/422/485 COM Module: ST-COM Operations Guide - DOC. 5695A 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. Illumination indicates that the SIMPL program currently loaded has a network device defined at the same NET ID as the ST-COM. RXD (COM A / B) These LEDs flash when the ST-COM receives data from the serial device attached to the respective COM ports. TXD (COM A / B) These LEDs flash when the ST-COM transmits data to the serial device attached to the respective COM ports. RTS (COM A / B) If RTS/CTS handshaking is enabled, these LEDs illuminate when the ST-COM is ready to receive transmission of data from a serial device attached to the respective COM ports. CTS (COM A / B) These LEDs illuminate when the serial device on the respective COM port is ready to accept transmission of data from the ST-COM. This "Clear to Send" signal is available only if RTS/CTS handshaking is enabled; signal is controlled by external serial device. If CTS signal is not connected (in cable), the signal is held high and the LEDs are extinguished. Leading Specifications The table on the next page provides a summary of leading specifications for the ST-COM module. Dimensions and weight are approximations rounded to the nearest hundredth unit. Operations Guide - DOC. 5695A RS-232/422/485 COM Module: ST-COM · 5 RS-232/422/485 COM Module Leading Specifications of the ST-COM Crestron ST-COM SPECIFICATION Power Requirements: Default NET ID 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 TM ® DETAILS 12VDC, external power pack or 2.5 Watts (24VDC @ 0.104A), network 20 Version 1.18.01 or later 2 Version 1.54 or later 3 Version 51205V.UPZ or later 3 Version 51226X.UPZ or later 3 Version 51226W.UPZ or later 3 Version 40104S.UPZ or later Version 3.17.11 m, l, c or later 1U high, 1/2U wide Height: Width: Depth: Weight: 1.70 in (4.32 cm) 7.07 in (17.95 cm) 6.32 in (16.06 cm) 2.00 lb (0.93 kg) 1 1 The latest software version can be obtained from the What's New page (SIMPL Windows section) or Downloads page (SIMPLWIN Library) of the Crestron website (www.crestron.com). New users are required to obtain access to the FTP site. A later version may be necessary depending on which control system is used; consult the What's New page for guidance. ST-COMs with later versions of firmware may include features not mentioned in this guide. Newer versions of this guide can be obtained from the Products page (PRODUCT MANUALS section) of Downloads page (MANUAL Library) of the Crestron website or contact Crestron customer service. Firmware upgrade files can be obtained from the What's New page (Other Products section) of the Downloads page (UPGRADES Library) of the ...