Dataprobe 4P-MAS User manual

11 Park Place / Paramus, New Jersey 07652
TEL: [phone] FAX: [phone]
Website: www. dataprobe.com Email: [email protected]
Technical Support Hotline: [phone]
INTRODUCTION
The 4 Position Code Activated Switch, Model 4P-MAS allows one master RS-232 port to be selectively
switched to any of four RS-232 devices, designated A through D. Typically, the 4P-MAS is used to
allow one modem to access the configuration or out-of-band management ports of four remote devices
(see Figure 1A). Three modes of operation allow the selection of the port to be connected.
Menu Selection
The 4P-MAS selects the port to connect to the master based on menu selections.
The menu system allows convenient naming of each port, and setup of all 4P-MAS
parameters.
Lead Control
This option allows any of the four ports can access the master port by raising its
Request To Send (RTS) or Data Terminal Ready (DTR) control lead. This capability is
in addition to the menu selection as described above.
Manual Control
A front panel push-button allows local control of port selection.
There are four LED's on the front of the 4P-MAS to indicate which port is connected to the master.
There are four DB25S female connectors on the rear panel for the switched ports, (designated A-D) and
one DB25P male connector for the Master Port. The 4P-MAS also supports an internal modem option.
Dataprobe supplies modems from 2400 bps to 33.6 Kbps. This modem can be factory or field installed.
Figure 1 illustrates a typical system using the 4P-MAS.
Internal or
External
Modem
Master
Port
ABCD
To DCE
To 4 DTEs
REF: CAS\4P-MAS_V980326R.DOC
4 Position Menu Activated Switch
Model 4P-MAS

Model 4P-MAS-30 Page 2
OPERATION
The 4P-MAS is controlled principally through an ASCII terminal interface. Access to this configuration
menu can be achieved either by: connecting via modem connected to the Master Port, or directly via
terminal (using a null cable) into the Master Port of the 4P-MAS. See page 6 for installation details.
The default parameters are: 9600 bps 8 data 1 stop no parity.
All of these parameters can be changed through the programming menu.
Auto Rate Detect: The 4P-MAS automatically determines the speed of the connection. If the Login
Prompt does not appear, press the Enter Key several times to enable the Auto Rate Detect.
Once connected to the 4P-MAS, the system sends a login prompt.
LOGIN >
Enter the Security Code. The Factory Default Security Code is: TEST . Please change this code
as soon as possible. Remember your code. When connecting through a modem, three incorrect
attempts to enter the security code will cause the 4P-MAS to terminate the call. When the correct code
is entered, the Main Menu appears:
A) PORT A
B) PORT B
C) PORT C
D) PORT D
1) LOCAL CONFIGURATION
X) EXIT
ENTER PORT >
This allows selection of any port, Local Configuration to access the programming menu or terminate the
current session. When Exit is selected, the 4P-MAS logs the user out and a new Login is required.
To select a port, enter the letter desired, followed by the Enter Key. Once a port is selected, the
4P-MAS will clear the screen and generate the following message:
PORT A SELECTED
ENTER ESC{PASSWORD}ESC TO RETURN TO MENU
At this point the Master Port is connected through to the port selected. The 4P-MAS is passive to the
messages sent between the Master Port and the port selected. To terminate the session with the
current port and bring back the menu, enter the escape character plus the security code and another
escape character. i.e. EsCTESTEsC

Model 4P-MAS-30 Page 3
LOCAL CONFIGURATION
A configuration menu is used to set most operational features of the 4P-MAS.
1) DEVICE LABELS
2) PASSWORD
3) BAUD: 9600
4) PARITY/DATA: N,8
5) LEAD CTL: N
6) MODE: MODEM
7) TIMEOUT: 0
X) EXIT
ENTER >
Device Labels
This allows changing of the screen labels for the ports.
A) PORT A
B) PORT B
C) PORT C
D) PORT D
X) EXIT
ENTER LABEL # (A-D) >
Enter the label to be changed. The current label is displayed along with a prompt for the new name.
Type in a new label and then confirm the selection as shown below. Labels can be up to 32 characters.
CURRENT LABEL PORT A PORT A
NEW LABEL PORT A > Your New Name
PORT LABEL CHANGED FROM: PORT A
TO: Your New Name
SAVE CHANGES? (Y/N) >

Model 4P-MAS-30 Page 4
Password
To change the password, it must be reentered. Then a prompt for a new password, then a confirmation
of the new password. The password may be up to eight characters and is case sensitive.
LOGIN > TEST
ENTER NEW PASSWORD > TEST
RE-ENTER NEW PASSWORD > TEST
PASSWORD CHANGED
Please remember you password. If you forget your password, the unit needs to be returned to
Dataprobe for re-initialization. There is a charge for this.
Set Baud Rate
ENTER BAUD =>
Valid selections are 300 600 1200 2400 4800 9600 19200 38400 57600 and 115200
This changes only the default speed. The Auto Rate Detector can always be invoked by sending the
Enter Key several times.
Set Character Format
ENTER N,E,O >
Enter only the Parity, N, E or O for None, Even, Odd respectively. The 4P-MAS will automatically
adjust for the number of data bits and 1 stop bit.
Set Lead Control
ENTER Y/N >
Enter Y to add RTS/DTR Lead control to the 4P-MAS. This mode allows the RTS or DTR of Ports A
through D to select the Master Port. Change this setting to Yes if you require one or more of the
devices connected to ports A through D to be able to dial out through the modem on the Master Port.
See page 5 for a detailed description of Lead control.
Mode
Sets the 4P-MAS for either Terminal or Modem use. Each time selection 6 is chosen, this setting
toggles.
Terminal Mode: The 4P-MAS does not monitor the connection status of the Master
Port. This mode allows an unlimited number of login attempts. Use this mode for direct
cable connections from a PC or Terminal to the 4P-MAS.
Modem Mode: The 4P-MAS monitors the DCD lead from the Master Port. Each time
DCD goes high (indicating that a call has been established) the 4P-MAS generates the
Login prompt. Three unsuccessful login attempts causes the 4P-MAS to hang up the
modem. Use this setting when the 4P-MAS is connected to a dial modem.

Model 4P-MAS-30 Page 5
Timeout
ENTER TIMEOUT =>
The 4P-MAS can automatically de-select a port if no data activity is detected received by the Master
Port. This setting selects the length of time 0-99 minutes for this timeout. The Factory Default setting
of 0 selects No Timeout.
Exit
Exit the programming menu and activate all current settings. If the baud rate and/or character format
have been changed, Exit will enable those changes.
LEAD CONTROL
The 4P-MAS allows local ports to access the Master port by raising RTS or DTR. When the selected
lead goes high on any of the four ports, it will establish a connection from that port to the Master Port.
This works on a queued basis; as subsequent ports each raise their lead they will be serviced in order
of appearance. Lead control will only be enabled only when the 4P-MAS is idle. If a caller has logged
into the unit or Manual control is selected, the RTS and DTR leads are ignored. The Timeout feature, if
enabled continues to operate when Lead control selects a port. Once a port is selected due to Lead
control, Menu control and Manual control are locked out. The use of RTS or DTR is selected on a port
by port basis using jumper selections on the printed circuit board. See page 6 for configuration details.
MANUAL CONTROL
The manual push-button switch on the front panel can be used for local control of the 4P-MAS. Each
time the button is depressed, the port will cycle to the next port. To return the 4P-MAS to automatic
operation, depress the push-button switch for over two seconds; all Port LEDs will turn off. Manual
control will only be enabled only when the 4P-MAS is idle. If a caller has logged into the unit or Lead
control is selected, the front panel switch ignored. The Timeout feature, if enabled continues to operate
when Manual control is established. To override this feature, select Timeout = 0 from the Local
Configuration menu.

Model 4P-MAS-30 Page 6
INSTALLATION
Master and Switched Ports
Connection to the Switched A-D ports is made
using 25 pin D Subminiature connectors on the
rear of the unit. The following leads are supported
for Asynchronous communications:
Pin Designation
2 Transmit Data
3 Receive Data
4 Request to Send
5 Clear to Send
6 Data Set Ready
7 Signal Ground
8 Data Carrier Detect
20 Data Terminal Ready
The four switched ports A-D are wired DCE (output data on pin 3,RD). The Master port is wired for as
DTE. To directly connect a terminal device to the Master Port, a Null cable is required. Refer to Figure 3.
RTS / DTR Selection
Jumpers JP1 through JP4 allows selection of RTS or
DTR as the control lead used in the Code/Lead
Control mode. To access these jumpers, disconnect
the power source and remove the top cover of the 4P-
MAS by loosening the two screws on the underside of
the unit. The jumpers are located behind the B and D
Port Connectors. See Figure 4.
Typical
Port A-D
RTS
Mon. Switch Control Code
Mon.
Electronic
4 Way
Switch
2 TD
3 RD
4 RTS
5 CTS
6 DSR
8 DCD
DTR20
7 SG
2 TD
3 RD
4 RTS
5 CTS
6 DSR
8 DCD
DTR20
7 SG
Master
Port
Figure 2
System Diagram
2
3
4
5
6
7
8
20
Null Connection to Terminal
Control Leads Required vary from device to
device. Consult your operations manual for
details on your specific needs.
2
3
4
5
6
7
8
20
4P-MAS
Master Port
Figure 3
Null Modem Connection
DCBA
C
B
D
MASTER
A
B
C
D
POWER
A
Port Select
PORT
RTS
DTR
Figure 4
Component Location

Model 4P-MAS-30 Page 7
INTERNAL MODEM OPTION
Dataprobe offers the following internal modem options with the 4P-MAS:
MOD-24 2400bps Modem
MOD-144 14.4 Kbps Modem
MOD-336 33.6 Kbps Modem
These modem options, when ordered with the 4P-MAS are supplied factory installed. They can also be
ordered separately for field installation. Information on field installation is supplied with the modem.
Connection to the dial line is made using a RS-232 to Modular Adaptor, Model MA-CAS, supplied with
the modem. This adaptor connects to the Master Port and to an RJ11 Modular Jack. The modem’s
FCC registration and AT command set are supplied in a separate document.
With the modem installed, the Master Port
RS-232 port can still be used. With the
Modular Adaptor removed, an external
modem or terminal (with null cable) can be
directly connected to the Master Port. The
connections for the internal modem use pins
11 and 25, to avoid conflict with directly
connected devices.
SPECIFICATIONS
Physical
8” Wide x 6.25” Deep x 2.75” High.
Power
120VAC via Wall Mounted Power Supply. UL/CSA approved.
Communications
Speed:300 to 115,200 bps.
Character Format: 8 data, no parity, 1 stop bit / 7 data even or odd parity, 1 stop bit.
Interface: RS-232 Asynchronous .
Connectors: Ports A through D; 25 pin D Subminiature. Female.
Master Port 25 pin D Subminiature, Male.
Pins Supported: 1-8, 20.
AB
CD
MASTER
Modular
Adaptor
MA-CAS
Dial Line
Modular
Cord Figure 5
Dial Line Connection
with Internal Modem

Model 4P-MAS-30 Page 8
TECHNICAL SUPPORT, RETURNS & WARRANTY
Dataprobe Technical Support is available 8:30AM to 5:30PM ET to assist you in the installation and
operation of this product. To obtain Technical Support call our Tech Support Hotline at 201-967-8788,
or Email us at [email protected]. Please have the following information available when you call:
• Model of Product
• Serial Number
• Data of Purchase
• Name of Seller (if other than Dataprobe)
If you purchased this product through an Authorized Dataprobe Reseller, you should contact them
first, as they may have information about the application that can more quickly answer your questions.
WARRANTY
Seller warrants this product, if used in accordance with all applicable instructions, to be free from
original defects in material and workmanship for a period of One Year from the date of initial purchase.
If the product should prove defective within that period, Seller will repair or replace the product, at its
sole discretion.
Service under this Warranty is obtained by shipping the product (with all charges prepaid) to the
address below. Seller will pay return shipping charges. Call Dataprobe Technical Service at (201) 967-
8788 to receive a Return Materials Authorization (RMA) Number prior to sending any equipment back
for repair. Include all cables, power supplies and proof of purchase with shipment.
THIS WARRANTY DOES NOT APPLY TO NORMAL WEAR OR TO DAMAGE RESULTING FROM ACCIDENT,
MISUSE, ABUSE OR NEGLECT. SELLER MAKES NO EXPRESS WARRANTIES OTHER THAN THE
WARRANTY EXPRESSLY SET FORTH HEREIN. EXCEPT TO THE EXTENT PROHIBITED BY LAW, ALL
IMPLIED WARRANTIES, INCLUDING ALL WARRANTIES OF MERCHANT ABILITY OR FITNESS FOR ANY
PURPOSE ARE LIMITED TO THE WARRANTY PERIOD SET FORTH ABOVE; AND THIS WARRANTY
EXPRESSLY EXCLUDES ALL INCIDENTAL AND CONSEQUENTIAL DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts, and some states do not
allow the exclusion or limitation of incidental or consequential damages, so the above limitations or
exclusions may not apply to you. This warranty gives you specific legal rights, and you may have other
rights which vary from jurisdictions to jurisdiction.
WARNING: The individual user should take care to determine prior to use whether this device is
suitable, adequate or safe for the use intended. Since individual applications are subject to great
variation, the manufacturer makes no representation or warranty as to the suitability of fitness for any
specific application.
Dataprobe Inc.
11 Park Place
Paramus, NJ 07652