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DNR-1553-553
DNR-1553-553
Dual Channel MIL-STD-1553 interface board for PowerDNR RACKtangle® I/O chassis
 
The DNR-1553-553 is a high performance, two channel MIL-STD-1553 interface for new RACKtangle® I/O Chassis. Each channel operates fully independently and provides a complete dual, redundant 1553 interface. Each channel may be set as 1553a or 1553b, and the "b" interface fully implements specification notices 1 and 2. Each channel is transformer coupled, though direct coupling is available as an option.

Most 1553 functions are implemented by the on-board FPGA. This greatly reduces the burden placed on the RACKtangle CPU and ensures the DNR-1553-553 does not interfere with the functionality of other I/O boards installed.

Each channel may be independently configured as Bus Controller (BC), Remote Terminal (RT) or Bus Monitor (MT). As a Bus Controller, the board supports all standard BC-RT, RT-BC and RT-RT transfers and Mode Code, One-shot, and Broadcast messaging. The Remote Terminal support allows the board to be set at a single RT address, or to emulate up to 31 different RTs on the bus. The RT implementation supports single, double, and circular message buffering. Bus Monitoring (MT) mode provides the ability to monitor all activity, or select activity based upon RT address or Mode Code. In addition to monitoring data, MT mode monitors time tags, errors status and RT response time. Finally, each DNR-1553-553 channel may be set to simultaneously act as an RT and an MT.

Like the Chassis in which it is installed, the DNR-1553-553 is well suited for the harsh environments sometimes encountered in flight testing applications. The board is specified for operation from -40 ° to +85 °C, from 0 to 60,000 feet. The system is also fully tested for operation at 5 g vibration and up to 50 g shock.

The DNR-1553-553 includes our 1553 API, which has been designed to offer simple, easy-to-use controls and yet maintain the ability to access all 1553 functionality. The software driver is compatible with all popular operating systems including Vista, Windows, Linux as well as many real-time OS's including RTX, QNX, RT Linux and more. Software support is also included for all popular programming languages and applications packages including LabVIEW.
 
Characteristics:
  • 2 Independent, dual redundant bus interfaces
  • Bus Controller (BC), Remote Terminal (RT) or Bus Monitor (MT) modes
  • Multiple RT simulation up to 31 RTs
  • Supports 1553A or 1553B protocols (including notice 2)
  • Transformer or Direct Coupling
 
Technical Specifications
General
Number channels/ports 2, Independent
Channel configuration Dual redundant interfaces
Specification compliance MIL-STD-1553a or
MIL-STD-1553b including notices 1 & 2
Configuration Bus Controller (BC), Remote Terminal (RT) or Bus Monitor (BM). Either chan may be BC, RT or BM
Interface (software selectable)
[measured at connector]		 Transformer:
18-27 VPP, 70 Ω load		 Direct Coupling:
6-9 VPP, 35 Ω load
Isolation 350 Vrms
Power Consumption 5 W (not including load)
System Data Update Rates
Operation in a standard real-time host-based control loop 1 mS min (host-1553-host or 1553-host-1553 round trip)
Operation in asynch 1553 host-based control mode 200 uS typical
Bus Controller (BC) Specs
Configuration Independent Ports
Communication support BC to RT, RT to BC, RT to RT
Messaging protocols Standard Mode Codes, Broadcast messages
Message timing Scheduled or asynch with two levels of priority
Programmability Major/minor frame timing, intermessage gap times, time out and late response, BC retries
Error handling Automatic error detection and recovery
Remote Terminal (RT) Specs
Modes Single or multiple RT emulator (up to 31 different RTs) RT - RT xfers with simulated RTs may be implemented with user software
RT/BM joint mode Allows the unit to act as an RT while logging data as an BM
Error handling Automatic error detection and insertion
Bus Monitor (BM) Specs
Monitor modes Full or selective monitoring by RT address
Monitored parameter In addition to bus data, BM mode time tags data and capture Word/Message/Error status and RT response time
Environmental
Operating Temp. (tested) -40°C to +85°C
Operating Humidity 0 - 95%, non-condensing
MTBF 275,000 hours
Vibration IEC 60068-2-6 5 g, 10-500 Hz, sinusoida
IEC 60068-2-64 5 g (rms), 10-500 Hz, broad-band random
Shock IEC 60068-2-27 50 g, 3 ms half sine, 18 shocks @ 6 orientations
30 g, 11 ms half sine, 18 shocks @ 6 orientations
Altitude 0 - 70,000 feet (0 - 21,336 m)