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.
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