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4.0 – Machine Connections
J4A (JRS422): Serial Port Connector
J4A JRS422 (26-PIN CONNECTOR)
Front View
PIN #
SYMBOL
FUNCTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
CHASSI
S+5V
RDRD+
SDSD+
CS+
CSRS+
RSDTR
INIT/
GND
DSR
SDIOSDIO+
SCIOSCIO+
SCKSCK+
SERVOSERVO+
PHASEPHASE+
GND
+5V
COMMON
OUTPUT
INPUT
INPUT
OUTPUT
OUTPUT
INPUT
INPUT
OUTPUT
OUTPUT
BIDIRECT
INPUT
COMMON
BIDIRECT
BIDIRECT
BIDIRECT
BIDIRECT
BIDIRECT
BIDIRECT
BIDIRECT
BIDIRECT
BIDIRECT
BIDIRECT
BIDIRECT
COMMON
OUTPUT
DESCRIPTION
PMAC COMMON
+5VDC SUPPLY
RECEIVE DATA
RECEIVE DATA
SEND DATA
SEND DATA
CLEAR TO SEND
CLEAR TO SEND
REQ. TO SEND
REQ. TO SEND
DATA TERM READ
PMAC RESET
PMAC COMMON
DATA SET READY
SPECIAL DATA
SPECIAL DATA
SPECIAL CTRL.
SPECIAL CTRL.
SPECIAL CLOCK
SPECIAL CLOCK
SERVO CLOCK
SERVO CLOCK
PHASE CLOCK
PHASE CLOCK
PMAC COMMON
+5VDC SUPPLY
NOTES
DEACTIVATED BY "E8"
DIFF. I/O LOW TRUE **
DIFF. I/O HIGH TRUE *
DIFF. I/O LOW TRUE **
DIFF. I/O HIGH TRUE *
DIFF. I/O HIGH TRUE **
DIFF. I/O LOW TRUE *
DIFF. I/O HIGH TRUE **
DIFF. I/O LOW TRUE *
TIED TO "DSR"
LOW IS "RESET"
**
TIED TO "DTR"
DIFF. I/O LOW TRUE
DIFF. I/O HIGH TRUE
DIFF. I/O LOW TRUE
DIFF. I/O HIGH TRUE
DIFF. I/O LOW TRUE
DIFF. I/O HIGH TRUE
DIFF. I/O LOW TRUE ***
DIFF. I/O HIGH TRUE ***
DIFF. I/O LOW TRUE ***
DIFF. I/O HIGH TRUE ***
POWER SUPPLY OUT
The JRS422 connector provides the PMAC with the ability to communicate both in RS422 and RS232. Jumpers E107 and
E108 must connect pins 2 and 3 to use this port.
* Note: Required for communications to an RS-422 host port
** Note: Required for communications to an RS-422 or RS-232 host port
*** Note: These lines are used for an advanced feature and normally should not be connected.
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