Impulse ACB-104.ULTRA (3514) - Manual (Page 13)

© Sealevel Systems, Inc. - 11 - ACB-104.ULTRA User Manual
I/O Signal Derivation
The ACB-104.ULTRA input/output signals are directly generated via the Zilog
16C32 IUSC. The following table defines these signals, their origin pin and signal
name following the conventions set by the 16C32 user’s manual. If using a Sealevel
Systems, Inc. supplied driver, this is for informational use only.
Signal Source
Transmit Data
16C32 TXD Pin
Request To Send 16C32 Port7 Pin
Data Terminal Ready 16C32 Port6 Pin
Transmit Signal Element Timing 16C32 TXC Pin
Receive Data 16C32 RXC Pin
Clear To Send 16C32 CTS Pin
Data Set Ready 16C32 RXREQ Pin
Data Carrier Detect 16C32 DCD Pin
Transmit Clock 16C32 TXCO Pin
Receive Clock 16C32 RXCO Pin
Ring Indicator 16C32 TXREQ Pin
26 Pin Header Signal Layouts
In all modes, Pin 1 has a 1K ohm resistor to GND and pin 13 has a 1K ohm resistor
to +5V connection. This is useful for RS-485 biasing. If this presents a problem in
your implementation, please contact Sealevel Systems’ Technical Support for aid in
removing.
For convenience, the signal layout is shown for the optional IDC26 to DB-25M 8”
ribbon cable (Item# CA-118).