Delta Data Systems PMAC PCI - J4: Serial Port Connector; J4 JRS422 (26-Pin Connector)

PMAC-PC Hardware Reference
46 PMAC-PCI Base Board Connector Pinouts
J4: Serial Port Connector
J4 JRS422 (26-Pin Connector)
Front View
Pin #
Symbol
Function
Description
Notes
1
CHASSI
Common
PMAC Common
2
S+5V
Output
+5VDC Supply
Deactivated by E8
3
RD-
Input
Receive Data
Diff. I/O low TRUE **
4
RD+
Input
Receive Data
Diff. I/O high TRUE *
5
SD-
Output
Send Data
Diff. I/O low TRUE **
6
SD+
Output
Send Data
Diff. I/O high TRUE *
7
CS+
Input
Clear to Send
Diff . I/O high TRUE **
8
CS-
Input
Clear to Send
Diff. I/O low TRUE *
9
RS+
Output
Req. to Send
Diff. I/O high TRUE **
10
RS-
Output
Req. to Send
Diff. I/O low TRUE *
11
DTR
Bidirectional
Data Terminal Ready
Tied to DSR
12
INIT/
Input
PMAC Reset
Low is RESET
13
GND
Common
PMAC Common
Low is RESET
14
DSR
Bidirectional
Data Set Ready
Tied to DTR
15
SDIO-
Bidirectional
Special Data
Diff. I/O low TRUE
16
SDIO+
Bidirectional
Special Data
Diff. I/O high TRUE
17
SCIO-
Bidirectional
Special CTRL.
Diff I/O low TRUE
18
SCIO+
Bidirectional
Special CTRL.
Diff. I/O high TRUE
19
SCK-
Bidirectional
Special Clock
Diff. I/O low TRUE
20
SCK+
Bidirectional
Special Clock
Diff. I/O high TRUE
21
SERVO-
Bidirectional
Servo Clock
Diff. I/O low TRUE
22
SERVO+
Bidirectional
Servo Clock
Diff. I/O high TRUE ***
23
PHASE-
Bidirectional
Phase Clock
Diff I/O low TRUE ***
24
PHASE+
Bidirectional
Phase Clock
Diff. I/O high TRUE ***
25
GND
Common
PMAC Common
26
+5V
Output
+5VDC Supply
Power supply out
The JRS422 connector provides the PMAC with the ability to communicate both in RS422 and RS232. In
addition, this connector is used to daisy chain interconnect multiple PMACs for synchronized operation.
Jumper E110 selects between RS-232 or RS-422 signal types.
Jumper E110 enables or disables the use of the PHASE, SERVO and INIT lines
* Note: Required for communications to an RS-422 host port
** Note: Required for communications to an RS-422 or RS-232 host port
*** Note: Output on card @0; input on other cards. These pins are for synchronizing multiple PMACs
together by sharing their phasing and servo clocks. The PMAC designated as card 0 (@0) by its jumpers
E40-E43 outputs its clock signals. Other PMACs designated as cards 1-15 (@1-@F) by their jumpers
E40-E43 take these signals as inputs. If synchronization is desired, these lines should be connected even
if serial communications is not used.
See Also:
Serial Communications
Synchronizing PMAC to other PMACs