User's Manual

3U Turbo CPU Board for UMAC Turbo and Turbo Stack
Board Connector Pinouts 19
BOARD CONNECTOR PINOUTS
J7: RS-232/422 Serial Port Connector
(26-pin Header at Location A-2)
Front View
Pin # Symbol Function Description Notes
1 CHASSI Common Turbo PMAC2-3U Common
2 S+5V Output +5VDC Supply Deactivated by ES
3 RD- / RXD- Input Receive Data Diff. low TRUE / low TRUE
4 RD+ Input Receive Data Diff. high TRUE
5 SD- / TXD- Output Send Data Diff. low TRUE / low TRUE
6 SD+ Output Send Data Diff. high TRUE
7 CS+ / CTS Input Clear to Send Diff. high TRUE / high TRUE
8 CS- Input Clear to Send Diff. low TRUE
9 RS+ / RTS Output Request to Send Diff. high TRUE / high TRUE
10 RS- Output Request to Send Diff. low TRUE
11 DTR Bidirect Data Terminal Ready Shorted to DSR
12 INIT/ Input Turbo PMAC2-3U Reset Low is RESET
13 GND Common Turbo PMAC2-3U Common
14 DSR Bidirect Data Set Ready Shorted to DTR
15 SDIO- Bidirect Special Data Diff. I/O low TRUE
16 SDIO+ Bidirect Special Data Diff. I/O high TRUE
17 SCIO- Bidirect Special CTRL. Diff. I/O low TRUE
18 SCIO+ Bidirect Special CTRL. Diff. I/O high TRUE
19 SCK- Bidirect Special Clock Diff. I/O low TRUE
20 SCK+ Bidirect Special Clock Diff. I/O high TRUE
21 SERVO- Bidirect Servo Clock Diff. I/O low TRUE
22 SERVO+ Bidirect Servo Clock Diff. I/O high TRUE
23 PHASE- Bidirect Phase Clock Diff. I/O low TRUE
24 PHASE+ Bidirect Phase Clock Diff. I/O high TRUE
25 GND Common Turbo PMAC2-3U Common
26 +5V Output +5VDC Supply Power Supply Out
The RS-232 / 422 connector provides the Turbo PMAC2 3U with the ability to communicate both in RS422 and
RS232. In addition, this connector is used to daisy chain interconnect multiple Turbo PMAC2 3Us for synchronized
operation.
The connector is arranged so a flat cable can connect directly to a DB-25 serial connector on the other end.
Jumpers E17 and E18 should connect pins 1 and 2 to use this port for RS-232 communications; they should connect
pins 2 and 3 to use this port for RS-422 communications.