AMX NETLINX CARDFRAME, CARDS NETMO User manual

instruction manual
NetLinx Central Controllers and Cards
NetLinx CardFrame,
Control Cards, and
NetModules
NXC, NXF, and NXM Series

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Table of Contents
i
NXF CardFrame, NetLinx Control Cards, and NetModules
Table of Contents
NXF CardFrame and NetModules ............................................................................1
NXF CardFrame ................................................................................................................ 1
NXF Cardframe Specifications ......................................................................................... 2
Mounting Master/Hub Cards in an NXF CardFrame ................................................................ 2
Setting the CardFrame's starting address................................................................................ 3
Device:Port:System (D:P:S)..................................................................................................... 3
NXS-NMS NetModules...................................................................................................... 4
NXS-NMS NetModules specifications...................................................................................... 4
Mounting modules into an equipment rack .............................................................................. 4
Installing Control Cards into an NXF CardFrame..................................................................... 5
Preparing/connecting captive wires ......................................................................................... 5
Using the ID button .................................................................................................................. 5
NXC-COM2 Dual COM Port Control Card ...............................................................7
Specifications .................................................................................................................... 7
Pinouts and Wiring Configuration ..................................................................................... 8
NXC-COM2 Channel Assignment ..................................................................................... 8
NXC-COM2 Programming Information.............................................................................. 9
NXC-COM2 Send_Commands ................................................................................................ 9
NXC-COM2 Send_String Escape Sequences ....................................................................... 12
NXC-I/O10 Input/Output Control Card ..................................................................15
Specifications .................................................................................................................. 15
NXC-I/O10 Channel Assignments................................................................................... 16
Setting the Switch/Voltage Mode Jumpers...................................................................... 17
Setting the Voltage Clamp Jumper (+12V or Open)........................................................ 17
NXC-IRS4 4-Port IR/S Control Card ......................................................................19
Specifications .................................................................................................................. 19
Pinouts, Signals, and Functions ..................................................................................... 20
NXC-IRS4 Channel Assignments.................................................................................... 20
Programming Information................................................................................................ 20
NXC-REL10 Relay Control Card ............................................................................27
Specifications .................................................................................................................. 27
Pinouts and Functions..................................................................................................... 27
NXC-REL10 Channel Assignments................................................................................. 28
NXC-REL10 Connections/Wiring .................................................................................... 28

ii NXF CardFrame, NetLinx Control Cards, and NetModules
Table of Contents
NXC-VAI4 Analog Voltage Control Card ..............................................................29
Specifications .................................................................................................................. 29
Pinouts and Functions..................................................................................................... 30
Channel Assignments ..................................................................................................... 31
NXC-VAI4 Output Level Assignments............................................................................. 33
NXC-VAI4 Input Level Assignments ............................................................................... 34
Programming Information................................................................................................ 34
NXC-VOL4 Volume Control Card ..........................................................................41
Specifications .................................................................................................................. 41
Pinouts, Signals, and Functions...................................................................................... 42
NXC-VOL4 Connections/Wiring ...................................................................................... 43
NXC-VOL4 Channel Assignments .................................................................................. 43
NXC-VOL4 Levels........................................................................................................... 44
CREATE_LEVEL ................................................................................................................... 44
SEND_LEVEL........................................................................................................................ 44
Programming Information................................................................................................ 45

NXF CardFrame and NetModules
1
NXF CardFrame, NetLinx Control Cards, and NetModules
NXF CardFrame and NetModules
NetLinx Control Cards can be installed in the NetLinx (NXF) CardFrame, the NI-4000, or in
modules for stand-alone operation. The NXF CardFrame accommodates a NetLinx Master (or
Hub) card, up to twelve NetLinx Control cards, and provides a back plane to distribute power and
data to/from the cards. The NXF CardFrame provides terminals on the rear panel for connection to
the control cards and a system power supply. A DIP switch on the rear panel sets the CardFrame's
base device number.
The NetLinx Control Cards covered in this document are:
NXF CardFrame
FIG. 1 shows the front and rear panel components of the NXF CardFrame.
• NXC-COM2 Dual COM Port Control Card
• NXC-I/O10 Input/Output Control Card
• NXC-IRS4 4-Port IR/S Control Card
• NXC-REL10 Relay Control Card
• NXC-VAI4 Analog Voltage Control Card
• NXC-VOL4 Volume Control Card
FIG. 1 NXF CardFrame
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1NXF
CARDFRAME
CARDFRAME NUMBER
ON
12VDC
CARDF RAME
PWR
front
r
ear
2-pin 12V power connector
Cardframe number DIP Switch
Control Card slots 1-12
Control Card slots 1-12
Master/Hub Card slot
Master/Hub Card slot

NXF CardFrame and NetModules
2NXF CardFrame, NetLinx Control Cards, and NetModules
NXF Cardframe Specifications
Mounting Master/Hub Cards in an NXF CardFrame
NetLinx Master and Hub Cards can be installed in the NXF CardFrame. The card mounts in a
horizontal position, through the master card slot on the rear panel of the NXF enclosure. To install a
Master or Hub Card in an NXF:
1. Discharge the static electricity from your body by touching a grounded metal object.
2. Unplug all the connectors from the NXF.
3. Remove the two screws holding the front plate on the Master Card, and remove the front plate.
4. Align the edges of the card with the guide slots inside the Master Card slot on the NXF.
5. Slide the card about halfway into the slot.
6. Inside the Master Card slot on the NXF, locate the 6-pin control cable connector.
7. Plug the connector from the NXF into the 6-pin terminal on the Master Card. This connector is
keyed to ensure correct orientation.
8. Once the control cable is connected, gently slide the card all the way in until you feel the rear
edge of the card lightly snap into place.
9. Re-apply power and other connections as necessary.
NXF Cardframe Specifications
Power Requirement 12 VDC; varies with installed Control Cards.
Dimensions (HWD) 3.5" x 17.0" x 9.6" (8.89 cm x 43.18 cm x 24.38 cm)
Weight 9.1 lbs (4.1 kg)
Front Panel Components:
Master/Hub Card slot Houses the Master or Hub Card. Refer to the NetLinx Master Cards and
Modules or NetLinx Hub Cards and Modules instruction manuals for
detailed information.
Control Card slots 12 card slots for the NetLinx Control Cards that control devices connected
to the CardFrame.
Rack-mounting brackets Provides for installing the CardFrame into an equipment rack.
Rear Panel Components:
Card slots Twelve 20-pin black (male) connectors and mating 3.5 mm captive-screw
terminals supplied with Control Cards.
Control Card connectors (1-12) 20-pin black (male) connectors that connect the Control Cards and exter-
nal equipment to the CardFrame.
+12 VDC PWR 2-pin green (male) connector for connecting a 12 VDC power supply. The
CardFrame can be powered via the Master Card (default) or by an exter-
nal power supply connected to the CardFrame's PWR connector. If a
power supply is connected to the PWR connector, the CardFrame power
automatically switches to the connected power supply. In that case, the
Control Cards and CardFrame are independently powered.
A simple rule to follow is if the CardFrame contains eight or more Control
Cards, use two 12 VDC power supplies.
CardFrame Number DIP switch Sets the starting address for the Control Cards in the CardFrame. The
8-position DIP switch address range is 1-3072.
Front faceplate Plastic gray faceplate with translucent viewing window.
Enclosure Metal with black matte finish.

NXF CardFrame and NetModules
3
NXF CardFrame, NetLinx Control Cards, and NetModules
Setting the CardFrame's starting address
The 8-position CardFrame Number DIP switch, located on the rear of the CardFrame (FIG. 1 on
page 1), sets the starting address (the device number in the D:P:S specification) for the Control
Cards installed in the CardFrame. The address range is 12-3060. The formula for setting the
starting address is:
(DIP switch address x 12) + Card slot Number (1-12) = Card address
For example:
 For DIP switch setting, 00010101: (0 + 0 + 0 + 0 + 96 + 0 + 384 + 1536) + SLOT #(ex:1)
= 2017.
 A card in slot number 7 would be device address 2023.
1. Set the CardFrame Number DIP switch based on the information listed in the table below.
2. Cycle power for approximately 5 seconds, so the system can read the new device number
settings.
Device:Port:System (D:P:S)
A device is any hardware component that can be connected to an AXlink or ICSNet bus. Each
device must be assigned a unique number to locate that device on the bus. The NetLinx
programming language allows numbers in the range 0-32,767. Device 0 refers to the local Master;
numbers greater than 32,767 are reserved.
NetLinx requires a Device:Port:System (D:P:S) specification. This D:P:S triplet can be expressed
as a series of constants, variables separated by colons, or a DEV structure. For example:
STRUCTURE DEV
{
INTEGER Number // Device number
INTEGER Port // Port on device
INTEGER System // System the device belongs to
}
The D:P:S notation is used to explicitly represent a device number, port and system. For example,
128:1:0 represents the first port on device 128 on this system. If the system and Port specifications
are omitted, (e.g. 128), system 0 (indicating this system) and port 1 (the first port) is assumed.
Here's the syntax:
NUMBER:PORT:SYSTEM
where:
Position 12345678
Value 12 24 48 96 192 384 768 1536
Factory default DIP switch value = 0 (zero) (All DIP switches are in the OFF position).

NXF CardFrame and NetModules
4NXF CardFrame, NetLinx Control Cards, and NetModules
NXS-NMS NetModules
The NXS-NMS NetModules (FG2009-10) accommodate one NetLinx Control Card, and connect
to the NetLinx bus via ICSNet connections. The NetModules offer a simple and economical way to
integrate additional functionality to control systems. FIG. 2 shows a NetModule shell and its main
components.
NXS-NMS NetModules specifications
The table below lists the NXS-NMS specifications.
Mounting modules into an equipment rack
To install the modules in an equipment rack using the optional AC-RK kit:
1. Remove the front faceplate from the module to expose the mounting holes.
2. Mount the module on the AC-RK bracket.
NUMBER: 16-bit integer represents the device number
PORT: 16-bit integer represents the port number (in the range 1 through the number of
ports on the Controller or device)
SYSTEM: 16-bit integer represents the system number (0 = this system)
FIG. 2 NXS-NMS NetLinx NetModule shell
NXS-NMS NetModules Specifications
Dimensions (HWD) 1.50" x 5.55" x 9.25" (3.81 cm x 14.10 cm x 23.50 cm)
ID button Generates an event from the NetModule to allow you to assign new
Device and System numbers, using ID mode in the NetLinx Studio soft-
ware program (see Using the ID button section on page 5 for details).
Control connector 20-pin black (male) connector that connects the NetModule to external
devices. These connectors are keyed to insure proper installation.
ICSNet RJ-45 connectors Receives power and data from a NetLinx Master/Hub ICSNet Port. An
ICSNet port on a NetLinx Master or Hub supplies up to 500 mA at 12 V
for module power.
12 VDC power supply connectors Two parallel male 2-pin (green) parallel connectors for 12 VDC power.
Enclosure Metal with black matte finish
Included Accessories NetLinx faceplate
Optional accessories AC-RK Accessory Rack Kit (holds up to three NetModules)
3
NXM-NMS 1720 1819 1516 1314 1012 11 896745
ID
NetModule
12
ICSNet PWR
12VDC
NetModule
ID Button
Parallel 12 VDC
2-pin power
supply connectors
Control Card slot
Control Card connector
ICSNet RJ-45 connectors
(20-pin)
front
rear

NXF CardFrame and NetModules
5
NXF CardFrame, NetLinx Control Cards, and NetModules
3. Place the AC-RK bracket (with the module) in the equipment rack and secure the bracket to the
rack.
4. Replace the front faceplate on the module, and attach the translucent plastic cover to the
faceplate (if necessary).
Installing Control Cards into an NXF CardFrame
1. Remove the magnetic front faceplate/viewing window from the CardFrame.
2. Align the edge of the Control Card with a slot in the CardFrame. Slide the card into the
CardFrame and press until you feel the Card seat in the backplane connector.
3. Put the magnetic faceplate back on the CardFrame. Secure with mounting screws (if
necessary).
Preparing/connecting captive wires
1. Strip 0.25 inch of wire insulation off all wires.
2. Insert each wire into the appropriate opening on the connector according to the wiring
diagrams and connector types described in this section.
3. Tighten the screws to secure the wires in the connector. Do not tighten the screws excessively;
doing so may strip the threads and damage the connector.
Using the ID button
The ID Button on the rear panel of the NetModules (see FIG. 2) is used in conjunction with the
NetLinx Studio software program to allow you to assign new Device and System numbers for the
Module.
1. Using NetLinx Studio, place the system in Identity (ID) Mode. ID Mode means the entire
system is put on hold while it waits for an event from any NetLinx device in the named system
(for example, pushing the ID button on a Module). The device generating the first event is the
identified device.
2. Press the ID Mode button to generate an event from the Module and allow you to assign new
Device and System numbers in NetLinx Studio.

NXF CardFrame and NetModules
6NXF CardFrame, NetLinx Control Cards, and NetModules

NXC-COM2 Dual COM Port Control Card
7
NXF CardFrame, NetLinx Control Cards, and NetModules
NXC-COM2 Dual COM Port Control Card
The NXC-COM2 Dual COM Port Control Card (FG2022) provides two RS-232, RS-422, or
RS-485 control ports and LED feedback for remote sources connected to the NetLinx CardFrame,
NI-4000 or NetModule. FIG. 3 shows the COM2 card.
Specifications
FIG. 3 NXC-COM2 Dual COM Port Control card
NXC-COM2 Specifications
Power Requirements: 140 mA @ 12 VDC
Operation: Data 1-2: Two RS-232/422/485 control ports,
supports XON/XOFF, CTS/RTS, 300-230,400 baud
Status LEDs (2 per channel): • Red LED shows TX (transmit) data activity
• Yellow LED shows RX (receive) data activity
- LED 1: CH1 TX (red)
- LED 2: CH1 RX (yellow)
- LED 3: CH2 TX (red)
- LED 4: CH2 RX (yellow)
• Green ICSP status LED (located on the board):
- On = card is not in communication with the Master.
- Blinks (1-second intervals) during normal operation.
Connections/wiring: Two 10-pin 3.5 mm captive-screw terminals
DEVICE_ID: $0107
ICSNET Status LED
LED 1
LED 4

NXC-COM2 Dual COM Port Control Card
8NXF CardFrame, NetLinx Control Cards, and NetModules
Pinouts and Wiring Configuration
NXC-COM2 Channel Assignment
NXC-COM2 Pinouts NXC-COM2 Wiring Configuration
Pin Signal Function RS-232 RS-422 RS-485
1 GND Signal ground X X
2 RXD1 Receive data X
3 TXD1 Transmit data X
4 CTS1 Clear to send X
5 RTS1 Request to send X
6 TX1+ Transmit data X X (strap to pin 8)
7 TX1- Transmit data X X (strap to pin 9)
8 RX1+ Receive data X X (strap to pin 6)
9 RX1- Receive data X X (strap to pin 7)
10 +12 VDC Power Optional Optional
11 GND Signal ground X X
12 RXD2 Receive data X
13 TXD2 Transmit data X
14 CTS2 Clear to send X
15 RTS2 Request to send X
16 TX2+ Transmit data X X (strap to pin 18)
17 TX2- Transmit data X X (strap to pin 19)
18 RX2+ Receive data X X (strap to pin 16)
19 RX2- Receive data X X (strap to pin 17)
20 +12 VDC Power Optional Optional
NXC-COM2 Channel Assignment
Channel Description
255 CTS push channel - reflects the state of the CTS input if a 'CTSPSH' command
was sent to the device.

NXC-COM2 Dual COM Port Control Card
9
NXF CardFrame, NetLinx Control Cards, and NetModules
NXC-COM2 Programming Information
NXC-COM2 Send_Commands
NXC-COM2 Send_Commands
Command Description
B9MOFF
Disable 9-bit in 232/422/
455 mode.
This command works in conjunction with the B9MON command.
Syntax:
SEND_COMMAND <DEV>,"'B9MOFF'"
Example:
SEND_COMMAND SOMEDEVICE_1,"'B9MOFF'"
Sets the port settings on SOMEDEVICE to match the port's configuration settings.
B9MON
Enable 9-bit in
232/422/455 mode.
This command works in conjunction with the B9MOFF command.
Syntax:
SEND_COMMAND <DEV>,"'B9MON'"
Example:
SEND_COMMAND SOMEDEVICE_1,"'B9MON'"
Resets the SOMEDEVICE port's communication parameters to nine data bits and
one stop bit.
CHARD
Set the delay time
between all transmitted
characters to the value
specified (in 100
microsecond increments).
Syntax:
SEND_COMMAND <DEV>,"'CHARD-<time>'"
Variable:
time: 0 - 255. Measured in 100 microsecond increments.
Example:
SEND_COMMAND RS232_1,"'CHARD10'"
Sets a 1-millisecond delay between all transmitted characters.
CHARDM
Set the delay time
between all transmitted
characters to the value
specified (in 1 millisecond
increments).
Syntax:
SEND_COMMAND <DEV>,"'CHARDM-<time>'"
Variable:
time: 0 - 255. Measured in 1 millisecond increments.
Example:
SEND_COMMAND RS232_1,"'CHARDM10'"
Sets a 10-millisecond delay between all transmitted characters.
CTSPSH
Enable Pushes, Releases,
and status information to
be reported via channel
255 using the CTS
hardware handshake
input.
If Clear To Send (CTS) is high, the channel is On.
Syntax:
SEND_COMMAND <DEV>,"'CTSPSH'"
Example:
SEND_COMMAND RS232_1,"'CTSPSH'"
Sets the RS232_1 port to detect changes on the CTS input.
CTSPSH OFF
Disable Pushes, Releases,
and Status information to
be reported via channel
255.
Turns CTSPSH Off. If Clear To Send (CTS) is high, the channel is on.
Syntax:
SEND_COMMAND <DEV>,"'CTSPSH OFF'"
Example:
SEND_COMMAND RS232_1,"'CTSPSH OFF'"
Turns off CTSPSH for the specified device. Disables the RS232_1 port to detect
changes on the CTS input.

NXC-COM2 Dual COM Port Control Card
10 NXF CardFrame, NetLinx Control Cards, and NetModules
NXC-COM2 Send_Commands (Cont.)
Command Description
GET BAUD
Get the RS-232/422/485
port’s current
communication
parameters.
Device sends the response out the Master program port.
Syntax:
SEND_COMMAND <DEV>,"'GET BAUD'"
Example:
SEND_COMMAND RS232_1,"'GET BAUD'"
Device responds with:
<port #>,<baud>,<parity>,<data>,<stop> 485 <ENABLED | DISABLED>
HSOFF
Disable hardware
handshaking (default).
Syntax:
SEND_COMMAND <DEV>,"'HSOFF'"
Example:
SEND_COMMAND RS232_1,"'HSOFF'"
Disables hardware handshaking on the RS232_1 device.
HSON
Enable RTS (ready-to-
send) and CTS (clear-to-
send) hardware
handshaking.
Syntax:
SEND_COMMAND <DEV>,"'HSON'"
Example:
SEND_COMMAND RS232_1,"'HSON'"
Enables hardware handshaking on the RS232_1 device.
RXCLR
Clear all characters in the
receive buffer waiting to be
sent to the Master.
Syntax:
SEND_COMMAND <DEV>,"'RXCLR'"
Example:
SEND_COMMAND RS232_1,"'RXCLR'"
Clears all characters in the receive buffer waiting to be sent to the Master.
RXOFF
Disable the transmission
of incoming received
characters to the Master
(default).
Syntax:
SEND_COMMAND <DEV>,"'RXOFF'"
Example:
SEND_COMMAND RS232_1,"'RXOFF'"
Disable the transmission of incoming received characters to the Master (default).
RXON
Start transmitting received
characters to the Master
(default).
Enables sending incoming received characters to the Master. This command is
automatically sent by the Master when a 'CREATE_BUFFER' program instruction
is executed.
Syntax:
SEND_COMMAND <DEV>,"'RXON'"
Example:
SEND_COMMAND RS232_1,"'RXON'"
Stops the RS232_1 device from transmitting received characters to the Master.

NXC-COM2 Dual COM Port Control Card
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NXF CardFrame, NetLinx Control Cards, and NetModules
NXC-COM2 Send_Commands (Cont.)
Command Description
SET BAUD
Set the RS-232/422/485
port's communication
parameters.
Syntax:
SEND_COMMAND <DEV>,"'SET BAUD
<baud>,<parity>,<data>,<stop> [485 <Enable |
Disable>]'"
Variables:
Baud: baud rates are: 230400, 115200, 76800, 57600, 38400, 19200, 9600,
4800, 2400, 1200, 600, 300, 150.
Parity: N (none), O (odd), E (even), M (mark), S (space)
Data: 7 or 8 data bits
Stop: 1 or 2 stop bits
485 Disable: Disables RS-485 mode and enables RS-232/422
485 Enable: Enables RS-485 mode and disables RS-234/422
Note: The only valid 9 bit combination is (baud),N,9,1.
Example:
SEND_COMMAND SOMEDEVICE_1,"'SET BAUD 115200,N,8,1,
485 ENABLE'"
Sets the SOMEDEVICE port's communication parameters to 115,200 baud, no
parity, 8 data bits, 1 stop bit, and enables RS-485 mode.
TSET BAUD
Temporarily set the
RS-232/422/485 port's
communication
parameters for a device.
TSET BAUD works the same as SET BAUD, except that the changes are not
permanent, and the previous values will be restored if the power is cycled on the
device.
Syntax:
SEND_COMMAND <DEV>,"'TSET BAUD
<baud>,<parity>,<data>,<stop> [485 <Enable |
Disable>]'"
Variables:
Baud: baud rates are: 230400, 115200, 76800, 57600, 38400, 19200, 9600,
4800, 2400, 1200, 600, 300, 150.
Parity: N (none), O (odd), E (even), M (mark), S (space)
Data: 7 or 8 data bits
Stop: 1 or 2 stop bits
485 Disable: Disables RS-485 mode and enables RS-232/422
485 Enable: Enables RS-485 mode and disables RS-234/422
Note: The only valid 9 bit combination is (baud),N,9,1.
Example:
SEND_COMMAND RS232_1,"'TSET BAUD 115200,N,8,1 485
ENABLE'"
Sets the RS232_1 port's communication parameters to 115,200 baud, no parity, 8
data bits, 1 stop bit, and enables RS-485 mode.
TXCLR
Stop and clear all
characters waiting in the
transmit out buffer and
stops transmission.
Syntax:
SEND_COMMAND <DEV>,"'TXCLR'"
Example:
SEND_COMMAND RS232_1,"'TXCLR'"
Clears and stops all characters waiting in the RS232_1 device's transmit buffer.

NXC-COM2 Dual COM Port Control Card
12 NXF CardFrame, NetLinx Control Cards, and NetModules
NXC-COM2 Send_String Escape Sequences
NXC-COM2 Send_Commands (Cont.)
Command Description
XOFF
Disable software
handshaking (default).
Syntax:
SEND_COMMAND <DEV>,"'XOFF'"
Example:
SEND_COMMAND RS232_1,"'XOFF'"
Disables software handshaking on the RS232_1 device.
XON
Enable software
handshaking.
Syntax:
SEND_COMMAND <DEV>,"'XON'"
Example:
SEND_COMMAND RS232_1,"'XON'"
Enables software handshaking on the RS232_1 device.
NXC-COM2 Send_String Escape Sequences
Command Description
27,17,<time>
Send a break character for
a specified duration to a
specific device.
Syntax:
SEND_STRING <DEV>,"27,17,<time>"
Variable:
time = 1 - 255. Measured in 100 microsecond increments.
Example:
SEND_STRING RS232_1,"27,17,10"
Sends a break character of 1 millisecond to the RS232_1 device.
27,18,0
Clear the ninth data bit by
setting it to 0 on all
character transmissions.
Used in conjunction with the 'B9MON' command.
Syntax:
SEND_STRING <DEV>,"27,18,0"
Example:
SEND_STRING RS232_1,"27,18,0"
Sets the RS232_1 device's ninth data bit to 0 on all character
transmissions.
27,18,1
Set the ninth data bit to 1
for all subsequent
characters to be
transmitted.
Used in conjunction with the 'B9MON' command.
Syntax:
SEND_STRING <DEV>,"27,18,1"
Example:
SEND_STRING RS232_1,"27,18,1"
Sets the RS232_1 device's ninth data bit to 1 on all character
transmissions.
27,19,<time>
Insert a time delay before
transmitting the next
character.
Syntax:
SEND_STRING <DEV>,"27,19,<time>"
Variable:
time = 1 - 255. Measured in 1 millisecond increments.
Example:
SEND_STRING RS232_1,"27,19,10"
Inserts a 10 millisecond delay before transmitting characters to the
RS232_1 device.

NXC-COM2 Dual COM Port Control Card
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NXF CardFrame, NetLinx Control Cards, and NetModules
NXC-COM2 Send_String Escape Sequences (Cont.)
Command Description
27,20,0
Set the RTS hardware
handshake's output to high
(> 3V).
Syntax:
SEND_STRING <DEV>,"27,20,0"
Example:
SEND_STRING RS232_1,"27,20,0"
Sets the RTS hardware handshake's output to high on the RS232_1
device.
27,20,1
Set the RTS hardware
handshake's output to
low/inactive (< 3V).
Syntax:
SEND_STRING <DEV>,"27,20,1"
Example:
SEND_STRING RS232_1,"27,20,1"
Sets the RTS hardware handshake's output to low on the RS232_1
device.

NXC-COM2 Dual COM Port Control Card
14 NXF CardFrame, NetLinx Control Cards, and NetModules