Ports
- The most ports in the smallest package -
- total of 104 Pins, plus a 44 Pin Daughter Card for additional ports. Each port is software controlled, and the configuration is defined in the Application Note for the completed module.
SIGNAL_IN
SIGNAL_IN_X ports are multi-purpose inputs. Each can be configured as one of the following types:
Ground/Open Input: A ground [or voltage below 1.8 volts] is a logical TRUE.
28V/Open Input: A voltage greater than 2.8 volts is a logical TRUE.
DC Analog Input: A 12-bit DC analog signal can be measured at 20Hz. The voltage range must be positive in relation to the signal ground, ranging from 0-6VDC.
Note: All Signal inputs have the configurable DC Analog Input range as described, except inputs 20-thru-23 which are only discretes.
Frequency Counting: Given any voltage threshold desired, as defined by the DC Analog Input configuration, inputs can be configured as frequency counting for any frequency ranging from 0-100KHz. This type of configuration can be used for signals such as Engine Tach or Fuel Flow.
GND_DISC_OUT
These are discrete outputs that are capable of providing Ground/Open signals with one of the following configurations:
Ground/Open Output: A ground signal capable of providing a constant 200mA output for running relays or annunciators.
Note: The total for all outputs across all GND/Open Discrete Outputs should be less than 3.0 amps nominally for reasons of heat generation.
Ground/Open SENSE: Some of the GND_DISC_OUT also have a piggybacked ground/open input, which can be used as either an input (like a SIGNAL_IN) or for safety critical aspects where the GND_DISC_OUT needs to be monitored from function and/or reported for a Continuous Built-In Test (CBIT).
SENSE_IN
SENSE_IN are piggybacked on ports that have a “+”, such as the GND_DISC_OUT_[X] + and PASS_THRU_[X] + ports.
SENSE_IN ports can be used as a discrete input or a frequency counter. A common use for the SENSE_IN_[X] ports is for position strapping of the unit or for wrap-around verification that GND_DISC_OUT_[X] outputs are operating reliably for safety-critical applications.
V_DISC_OUT
These ports are capable of providing 25V/Open signals with a constant 300mA output for running relays, valid flags, or annunciators. They are high-side-fet driven, providing a source for clicking relays, or for providing NAV Superflags.
Note: If there are V_DISC_IN pins, then the V_DISC_OUT draws current from power input to those pins. Apply power to the V_DISC_IN port by either splicing into the main box power or by powering through a separate 1 amp circuit breaker.
ANALOG_IN
Precision Analog inputs are capable of receiving a 24 bit voltage from -3 to 48VDC. The precision of these is fine enough to be used for temperature thermocouples, flight control position sensors, current sensors/shunts, 150mA Deviations.
These are differential amplified and isolated from ground. Maximum read frequency is 100Hz depending on the application.
A429_RX(TX)
Note: There are more ARINC 429 ports on daughter cards, but just showing J1 ports in this diagram.
The U1713 framework implements a full software controlled A429 “stack”. The software drivers offer full control to mix and match any label, SDI, and parity on the same bus.
Each port is capable of independently transmitting and receiving a maximum of 2,777 words per second. Words can be scheduled to be transmitted in a particular order, or queued when the software is ready to transmit them.
Layered protocols are supported such as ARINC 615 or ARINC 708. Ports can be configured as either High Speed (100 kBits/sec) or Low Speed (12.5 kBits/sec).
RS422_RX(TX)
RS-422 ports can be configured to support a number of commercial/industrial signal types such as RS-422/485. Collins Serial Data Bus (CSDB) is also supported. Signals can be software controlled through standard UART exchanges or “bit-banged” for unique protocols, such as control panel signals
or even Honeywell data buses.
Note: ModBus, CAN Bus and other protocols are supported through these ports and other dedicated means through daughter cards.
RS232_RX(TX)
RS-232 signals can be software controlled through standard UART exchanges or can support non-synchronous communication.
- other Supported Types through various daughter cards include...
ASCB Honeywell Avionics Standard Communications Bus
ASCB ports support end systems on an ASCB network. The ASCB may be one or more end systems on the network (such as an AHRS), or may be the bus controller (such as the autopilot or symbol generator). The ASCB ports support versions A/B/C and the ASCB clock in the case of ASCB version A.
The ASCB ports can be configured for other Honeywell protocols, such as Radio Select Bus (RSB).
AC_SIGNAL_OUT
This is a software-controlled AC output capable of transmitting AC signals such as [not limited to]:
- ARINC-407
- Synchro-servo
- 393mV/degree pitch and roll commands
Note: Most AC_SIGNAL_OUT applications require that the AC_REFERENCE_IN be wired to 26VAC reference.
DC_SIGNAL_OUT
This is a software-controlled 16-bit DC output capable of transmitting DC signals such as [not limited to]:
- 150mA Navigation Deviations
- Radio Altitude Analogs
- AHRS Accelerometer Outputs
- Control Surface Positions for Flight Data Recorder Interfaces
CAN_BUS
This is a software-controlled dual-channel CAN interface capable of transmitting and receiving CAN messages such as [not limited to]:
- Standard and extended identifier frames
- Data rates up to 1 Mbps
- ARINC 825-compatible traffic
Note: The CAN ports support both classic CAN 2.0A/B and can be configured for ARINC 825 operation.
Provisionally the U1713 intends to implement other protocols such as Ethernet, ARINC 664/AFDX, and MIL-STD-1553. If you don’t see the protocol you need, just let us know.