Extron electronic IPL T SF24 Bidirectional serial control interface ports, Digital output

Page 20

Communication and Control, cont’d

If the integrator selects threshold voltages that are more than 0.1V apart, a deadband, or hysteresis, will be established.

In the example below, the lower threshold voltage is set at +6VDC and the upper threshold is set at +16VDC. The colored bands show state changes on the logical outputs.

The range between 6-16VDC is the deadband in which the signal can fluctuate without affecting the input state.

 

Low

VDC

High

26

 

24

 

22

 

20

Upper

18

Threshold

16

 

14

 

12

Hysteresis

10

Lower

8

Threshold

6

 

4

 

2

 

 

Time

Figure 4-5 — High and low transitions of adjustable threshold with deadband (hysteresis)

Digital output

When a Flex I/O port is configured as a digital output, it is set to offer two output states: “On” and “Off”. When the port is set to an “On” state, (SW1 is closed), the I/O pin is connected to ground (each I/O port is capable of sinking 250mA max.). When the port is set to the “Off” state, (SW1 is open), the output pin is floating.

If the application calls for TTL compatibility, SW2 can be selected to provide a 2K pull-up resistor to +5VDC.

+5V

+30V

390

I/O

24K SW1

GND

Figure 4-6 — Sample of a digital output port driving an LED using an external +5VDC source

Analog input

When a Flex I/O port is configured as an analog input, the port can measure 0 to 25.3VDC with 12bit accuracy. A DC level will be indicated by a count from 0-4096 (6mv/count).

+30V

+12V

I/O 10

10K

24K

GND

Figure 4-7 — Sample of an analog input for a level adjustment, using a 10K pot

Bidirectional serial control interface ports

The IP Tools family of products has several models that incorporate bidirectional serial control ports. The serial ports allow for control of a wide variety of existing Extron and third- party devices. The most common serial control formats are RS- 232, RS-422, and RS-485. Within the IPL T products, there are two different implementations for the serial control ports: the 9-pin D connector and the captive screw connector.

9-pin D Connectors — On some IPL T units, serial control is accessed through a 9-pin D connector. In this configuration, all three control formats are available and fully software configurable. By selecting the RS-232 format, hardware handshaking (RTS, CTS) is also available. The RS-232 connection uses the same industry standard interface pin-out as found on standard PCs. If selecting either RS-422 or RS-485 formats, verify proper wiring as detailed in figure 2-8. These two formats do not have an industry standard pin-out and will vary from device to device.

Captive Screw Connectors — On other IPL T units, several of the serial interface ports are connected on captive screw terminals. When using the ports on the captive screw terminals, only RS-232 control is available, and hardware handshaking is unavailable. Since RS-232 is the most common control interface encountered, this port configuration allows for quick termination.

4-4

IPL T SF24 and IPL T SFI244 • Communication and Control

IPL T SF24 and IPL T SFI244 • Communication and Control

4-5

Page 19 Page 21
Image 20
Page 19 Page 21
Contents IP Link Tools USAFCC Class a Notice PrecautionsExtron’s Warranty Quick Start Guide IPL T SF24 and SFI244 Under Desk Projector MountTable of Contents Table of Contents, cont’d IPL T SF24 and SFI244 OneIntroduction Features IntroductionAbout this Manual About the IPL T SF24 and SFI244 InterfacesInstallation and Operation Easily configured and controlledTwo Introduction, cont’dInstallation and Operation Installation OverviewIPL T SF24 and IPL T SFI244 Installation and Operation Mounting the IPL T InterfaceInstallation and Operation, cont’d Rear Panel Features and CablingPower Furniture or projector mountingEthernet/LAN Serial communicationIdentification Front panel indicatorsOperation Resetting the unit Connection and Configuration ThreeConnection and Configuration, cont’d Connecting the HardwareSerial connection Ethernet connectionConfiguring the Hardware PC configurationIPL T interface configuration Flex I/O connectionPing Configuring the IPL T using direct PC connectionArp -s 10.13.170.15 00-05-A6-00-0A-90 Connection and Configuration, cont’d Firmware upgradesFour Communication and ControlCommunication and Control, cont’d Ports OverviewFlex I/O ports Digital inputAnalog input Bidirectional serial control interface portsDigital output Accessing and using the Web server Logon and system status Establishing or changing system or port settingsCommunication with the Interface Web server10 Web server System Settings screen Controlling IR devices or sending IR commands SFI244 onlyEditing and adding e-mail alerts Setting and changing your passwordsCommunication and Control, cont’d Sending an e-mail alert through Telnet Esc 4 SMUpgrading the firmware Managing filesIR Learning SFI244 only Creating a driver with the IR Learner softwareUsing the command/response table Programmer’s Guide for the Telnet and Web browserSymbol definitions Password information Copyright information28 = Commands that may give E28 file not found Error responsesBidirectional Serial Data port Flex I/O Data portFirmware Version/Part Number/Information IP Setup CommandsIR/Serial Data port SFI244 only File Commands Re-map port designationsWeb Browser Specific MailReset ZAP/Erase Commands Communication and Control, cont’d CustomizationServer side includes ControlExample Query stringCode examples 26c Browser view 28a Html source code using a query string Href=index.html?cmd=W1*1*15*0irPlay/a 30b Browser viewUnsafe characters URL encodingReserved characters Direct port access ports 2001 through Communication and Control, cont’d Device ControlCustom Web pages Telnet PortTroubleshooting Power connectionsPort redirect Data connectionsSpecifications, Part Numbers Accessories AAppendix aSpecifications AppendixBB GlossaryParts Included partsGlossary GlossaryGlossary, cont’d
Top Page Image Contents