May 2, 2011
WIRING DETAILS
Communications Wiring
20
Part Number 11694 Rev 1.6
JACE-700
MOUNTING AND WIRING GUIDE
|
RS-232
An RS-232 serial port using a male DB-9 connector always operates as COM1. You
can use standard DB-9 serial cables with this port.
The controller is a serial DTE device, such another DTE device (PC, for example)
requires a “null modem” cable. If connecting to a DCE device (modem, for example),
use a straight-through cable.
provides standard serial DB-9 pinouts..
Note
If rebooted with the mode jumper in the “Serial Shell” position (see
on page 14), the RS-232 port provides “system shell” access. See the
JACE
NiagaraAX Install and Startup Guide
for related details.
RS-485
An RS-485, optically isolated port is available on 3 pins of the 6-position right-side
connector, and always operates as COM2. As shown in
, the screw terminals
are minus (–), plus (+), and shield. Wire in a continuous multidrop fashion to other
RS-485 devices, meaning “minus to minus”, “plus to plus,” and “shield to shield.”
Connect the shield to earth ground at one end only, such as at the JACE-700.
USB
Two USB-2.0 ports are standard on the controller. On the JACE-700, these ports are
“stacked” together, located on the top side—see
Note
Both USB ports are “low current” ports, capable of supplying up to 100 mA
at 5V, maximum.
A typical application for a USB port is to use with a “USB Flash drive” for the transfer
of files. The QNX OS running on the controller can automatically recognize an
inserted Flash drive as a physical disk.
Table 4
Serial port (RS-232 and RS-485) pinouts.
Base RS-232 DB-9 Port (COM1)
Base RS-485 Port (COM2)
Pinout Reference
Signal
DB-9 Pin
Pinouts
DB-9 Plug (male)
DCD
Data carrier detect
1
6-Position end connector (male)
RXD
Receive data
2
TXD
Transmit data
3
DTR
Data terminal ready
4
GND
Ground
5
DSR
Data set ready
6
RTS
Request to send
7
CTS
Clear to send
8
not used on the JACE-7
9
PS – (GND)
PS + (15V)
BB (12V Batt)
–
+
S
RS-485
Power
