Delta Electronics, Inc.

SSSI Small Switch Serial Interface

The SSSI Small Switch Serial Interface provides an RS-232 serial data interface for remote control and status reporting of small Model SLS-4M, Model SLS-5M and Model SLS-7M Strip Line Switches. This single printed circuit board interface assembly includes microprocessor, random access memory, programmable read-only memory, high level matrix interface circuits and serial data interface circuits for use with switch sizes up to four columns by four rows. The serial data interface uses ASCII characters for control and status information. The control and status command format is based on the Model MCU-8C and Model MCU-9C serial interface format standard for compatibility with computer control programs and drivers developed for transmit matrix control and status via the MCU-8C or MCU-9C. The interface enables remotely controlled connection and disconnection of switch circuits, and provides status reports of the switch circuits and interlock circuits. The serial interface provides programmable parity and stop bit characteristics, and switch selectable baud rates in standard increments from 50 through 19200 baud. RS-422/423/485 and fiber optic data communication circuits are also available. Consult factory for optional serial data formats, interfaces or custom control/status applications.

Model SLS-4 SSSI
Model SLS-4M (4 X 4) Strip Line Switch with SSSI Small Switch Serial Interface

Standard Serial Interface Characteristics

  1. Data bits per character:  seven
     
  2. Start bit: one

  3. Stop bits (jumper programmable):  one (factory program) or two
     
  4. Parity (jumper programmable):  even (factory program) or odd
     
  5. Baud rates (switch selectable):  50, 75, 110, 150, 300, 600, 1200, 2400, 4800, 9600 and 19200

  6. Serial input circuit impedance:  180K Ohm

  7. Active/tristate serial output circuit (jumper programmable):  Serial output circuit is jumper programmable for operation with either a dedicated line or party line (multiple drop) serial communication circuit. When programmed for a dedicated line, the output circuit remains active (-6 Volts) when not transmitting data. When programmed for a party line, the output circuit is normally high impedance (tristate) and switches to an active mode only when transmitting data.

  8. Control circuits (jumper programmable):  RTS, CTS, DSR, DTR and DCD

Control and Status Word Formats
    A.Connect command (Remote control system to switch):
CR LF ADRS C T A X
    B.Disconnect command (Remote control system to switch):
CR LF ADRS D T X
    C.Status command (Remote control system to switch):
CR LF ADRS S T X
    D.Status response (Switch to remote control system):
CR LF ADRS S T A F M I PS ETB
    E.Complete status command (Remote control system to switch):
CR LF ADRS S A L L X
    F.Complete status response (Switch to remote control system):
CR LF ADRS S T1 A I1 T2 A I2 T3 A I3 T4 A I4 F M PS ETB
    G.Optional antenna ground status command (Remote control system to switch):
CR LF ADRS S G N D X
    H.Optional antenna ground status response (Switch to remote control system):
CR LF ADRS G A1 A2 A3 A4 ETB

The characters are defined as follows:
 CR =  ASCII Carriage Return
 LF =  ASCII Line Feed
 ADRS =  Switch address (switch selectable): ASCII characters 0-9, A-F (factory set to ASCII 1)
 C =  Command designator for connect message
 D =  Command designator for disconnect message
 S =  Command designator for status message
 G =  Command designator for antenna ground status message
 ALL =  ASCII character string meaning all transmitters
 GND =  ASCII character string meaning antenna ground
 T =  Transmitter number
 A =  Antenna number
 T1-T4 =  Number of transmitters 1 through 4, respectively
 A1-A4 =  Antennas 1 through 4 ground status digit:
0 = antenna not grounded
1 = antenna grounded
 F =  Fault digit:
0 = no fault
1 = summary fault
3 = connection fault
5 = antenna grounding fault (optional)
 M =  Mode digit:
Always 1 = remote mode
 I =  Transmitter interlock status digit:
0 = open interlock
1 = valid interlock
 I1-I4 =  Transmitters 1 through 4 interlock status digit, respectively
 PS =  Matrix power supply status digit:
0 = supply fault
1 = supply normal
 X =  ASCII X to end command message
 ETB =  ASCII end of transmission block to end status response

SPECIFICATIONS
Number of Switch Inputs/Outputs:4 Inputs/4 Outputs
Data Interface:
  Standard:
 
  Optional:		  
RS-232 interface, baud rate selectable in standard increments from 50 through 19200 baud
RS-422/423/485 and Fiber Optic
Matrix Operate Time:Less than 0.7 second after receiving a valid connect or disconnect command
Confirm Time:Transmission of status response begins approximately 0.1 second after receiving a status command except during matrix operate and status update sequence
Error Detection:Parity, framing and overrun error detection prevents faulty operation of matrix and errors in status reporting
Power Requirements:Uses standard 40 or 48 VDC motorized switch power supply or external 15 to 60 VDC supply
Dimensions:6.5" wide x 6.3" high x 1.5" deep. Mounts on switch main panel behind front panel.
Environmental:Operating Temperature: 0° C to 50° C
Non-Operating Temperature: -54° C to +71° C
Humidity: 0% to 90% noncondensing
For additional information on any of our products, please contact Sales to discuss your particular requirements:
Delta Electronics, Inc.
5730 General Washington Drive
P. O. Box 11268
Alexandria, VA 22312

 Phone: (703) 354-3350
U.S. Toll Free: 1-800-8-DELTA-8 (1-800-833-5828)
Fax: (703) 354-0216
www.deltaelectronics.com
Email: sales@deltaelectronics.com
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