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Connect Tech Xtreme/104-Plus, PCI-104 and PCI/104 Express Family User Manual
Revision 0.09
28
For 2-wire networks only the Jx.2A/Jx.2B jumpers should be installed. The
Jx.1E/Jx.1F jumpers are not used and will have no effect.
17.5 Line Interface Mode Jumpers for Xtreme/PCI-104 Opto 12 Port
The Line Interface Mode Jumpers function is as follows:
Mode / Jumpers
Jx..1A
Jx..1B
Jx..1C
Jx..1D
Loopback
1
1
1
0
RS232
1
1
0
0
RS485 4-wire /
Multidrop
0
1
0
1
RS485 2-wire
0
1
1
1
Low Power Shutdown
0
0
0
0
DO NOT USE ANY OTHER COMBINATIONS THAN THE ABOVE
1=Jumper on
0=jumper removed
17.6 Power-on Tri-state for Xtreme/PCI-104 Opto 12 Port
These models offer a power-on tri-state feature to ensure glitch-free power-up on multi-drop
networks. When enabled, the Xtreme/104-
Opto will hold the RS-485 transmitter in tri-state at
power up. This feature is available on ports configured as RS-485 half duplex or RS-485 4-wire
multi-drop.
Note: Enabling this feature on ports configured in RS-232 or RS-422 (RS-485 full duplex)
modes will alter the operation of the RTS signal.
Jumper
G-485
in J2 controls the power-on tri-state functionality. Install a jumper on this jumper
to enable the Power on Tri-State function..