
InterCom
Multi-Purpose Vehicle
Interface Adapter for
Parallel Connection to PC
EnGenius’ InterCom is a flexible solution that
can provide simultaneous access to the vehicle
network as well as digital and analog
input/output. (Custom protocols can also be
supported.) InterCom interfaces to a PC via the
parallel port.
InterCom’s unique design consists of a set of
Physical Interface Modules (PIMs) that plug into
its base platform. Each PIM (standard or custom
designed) contains the specific interface circuits
that allow InterCom to connect to external
devices. The PIMs and the base platform can all
function simultaneously. This multi-purpose
vehicle interface adapter provides a powerful,
yet flexible, solution to meet a wide range of
needs. InterCom is packaged in a 5.75" x 3.5" x
1.75" plastic enclosure.
Interface Capabilities
InterCom is capable of supporting SAE J1850
PWM, ISO 9141, ISO 9141-2 and others
(including custom protocols).
Applications
Base Platform Features
5 Parallel port interface to PC
5 1 Physical Interface Module (PIM) slot
5 8 channel 10 bit A/D inputs (4 on the main
connector, 4 are PIM accessible)
5 1 D/A output
5 4 digital inputs (1 on main connector, 3 are PIM
accessible)
5 4 digital outputs (1 on main connector, 3 are
PIM accessible)
5 20 MHz 80C196KC microcontroller
5 9–18 VDC input required (300 ma nominal,
1000 ma maximum)
5 32K RAM
5 128K Flash ROM
Optional Physical Interface Modules
5 SAE J1850 PWM (using an HBCC)
5 ISO 9141
5 Engineering development or in-vehicle use
5 Protocol translation
5 Network monitoring
5 Module validation, test fixtures
5 Diagnostics
5 Light and medium duty vehicles
EnGenius • 31077 Schoolcraft Rd. • Livonia, MI 48150- 2029 • (734) 522-2120 • www.engenius.com

Technical Data for InterCom Physical Interface Modules
SAE J1850 PWM
5 Uses Ford/Motorola Hosted Bus Controller
Chip (HBCC)
5 10.4K, 20.8K, 41.6K, and 83.3K baud
supported
5 Selectable line termination
5 Message timestamping
5 Configurable inter-message times
5 Configurable timed interval transmission of
up to 10 user-defined messages
5 Trigger pulse output on message received
or transmitted
5 Trigger input to initiate message
transmission
ISO 9141
5 K and L line support
5 5–1M baud supported
5 Selectable line termination
5 Byte stream or ISO 9141-2 message modes
with timestamping
5 Configurable inter-byte and inter-message
times
5 Configurable timed interval transmission of
up to 10 user-defined messages
5 Trigger pulse output on message received
or transmitted
5 Trigger input to initiate message
transmission
5 Jumper selectable ISO 9141 circuit voltage
(on-board or external)
5 Software configurable loop back
EnGenius • 31077 Schoolcraft Rd. • Livonia, MI 48150- 2029 • (734) 522-2120 • www.engenius.com