Turbo PMAC Clipper Hardware Reference Manual
Connections and Software Setup
19
J2: Serial Port
This connector allows communicating with Turbo PMAC Clipper from a host computer through a RS-
232 port. Delta Tau provides the Accessory 3L cable that connects the PMAC to a DB-9 connector. This
port can be used as a primary communication mean or employed as a secondary port that allows
simultaneous communication.
J2 (JRS232) Serial Port Connector
10-Pin Header
5
6
3
4
1
2
9
10
7
8
Pin#
Symbol
Function
Description
Notes
1
PHASE
Output
Phasing Clock
2
DTR
Bidirect
Data Terminal Ready
Tied to "DSR"
3
TXD/
Output
Send Data
Host receive data
4
CTS
Input
Clear to Send
Host ready bit
5
RXD/
Input
Receive Data
Host transmit data
6
RTS
Output
Request to Send
PMAC ready bit
7
DSR
Bidirect
Data Set Ready
Tied to "DTR"
8
SERVO
Output
Servo Clock
9
GND
Common
Digital Common
10
+5V
Output
+5Vdc Supply
Power supply out
10-pin female flat cable connector T&B Ansley P/N 609-1041
Standard flat cable stranded 10-wire T&B Ansley P/N 171-10
The baud rate for the RS-232 serial port is set by variable I54. At power-up reset, The Turbo PMAC
Clipper sets the active baud based on the setting of I54 and the CPU speed I52. Note that the baud rate
frequency is divided down from the CPU’s operational frequency. The factory default baud rate is 38400.
This baud rate will be selected automatically on re-initialization of the Clipper, either in hardware power
cycle or in software using the
$$$***
command.
To change the baud rate setting on the Turbo PMAC Clipper, set I54 to the corresponding value of
desired frequency. Restart the software (Pewin32Pro2), and adjust to the correct baud rate in the
communication setup window. Then issue a
SAVE
and a reset (
$$$
), or recycle power on the Clipper. For
odd baud rate settings, refer to the Turbo Software Reference Manual.
I54 Baud Rate I54 Baud Rate
8
9600
12
38,400
9
14,400
13
57,600
10
19,200
14
76,800
11
28,800
15
115,200
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