Line Interface: Line A Shield and Line B Shield (JB2 and JB4)
These jumpers apply to the line interface. When one of these jumpers is in positions 1 and 2, it links RJ-45 Pins 2 and 7 on the corresponding line to the interface module's frame ground. (If you are
using shielded twisted-pair cable, the shield can be connected to these pins). In positions 2 and 3, Pins 2 and 7 remain connected to each other, but are disconnected ("lifted") from frame ground.
JB2
Setting:
Positions 1 and 2
Line A Shield Connected
Positions 2 and 3
No Shield (default)
JB4
Setting:
Positions 1 and 2
Line B Shield Connected
Positions 2 and 3
No Shield (default)
CAUTION!
If you connect shield to frame ground, make sure that RJ-45 Pins 2 and 7,
as well as the cable shield, are connected to ground at one end of the cable
only. Connecting them at both ends of the cable will defeat the transformer
isolation and will leave your system open to damage from ground loops.
Serial Interface: Signal Ground and Frame Ground (JB5)
This jumper applies to the serial interface. In positions 1 and 2, this jumper links the Signal Ground (SGND) line (Pin 5) of both serial lines to the interface module's frame ground (FGND). When this
jumper is in positions 2 and 3, Pin 5 of both lines are disconnected ("lifted") from frame ground.
JB5
Setting:
Positions 1 and 2
SGND and FGND Connected
Positions 2 and 3
SGND and FGND Not Connected (default)
DSR tracks DTR (JB6 and JB7)
These jumpers
MUST
be left in their default positions. Because the interface module is designed to work with a whole family of products, and not just the Mini Driver MP Card, it is capable of
supporting some functions that are not used by the Mini Driver MP Card. Some products in this family might require these jumpers to be set differently, but the Mini Driver MP Card might malfunction
if either of these jumpers is in the wrong position. Make sure the jumper is placed across Pins 1 and 2.
DO NOT
place the jumper across Pins 2 and 3.
JB6
Setting:
Positions 1 and 2
DSR Tracks DTR (default)
Positions 2 and 3
N/A
INSTALLATION:
The MicroRacks: An Overview
Mini Driver MP Cards are designed to be installed in our MicroRacks (product codes RM202 for the 2-card models, RM204 for the 4-card models, RM208 for the 8-card models, and RM216 for the 16-card
models). You will install Mini Driver MP Cards in any MicroRack the same way.
The MicroRacks' Power Supply:
The power supply included with the MicroRacks uses the same mid-plane architecture as the line-driver cards. slide the front module of the power supply into the MicroRack from the front, and slide the rear
module in from the rear. The two modules plug into one another in the middle of the rack. Secure the front module with thumbscrews and the rear module with conventional metal screws; these screws and
thumbscrews come with the rack.
Switching the Power Supply ON and OFF:
The MicroRack's power switch is located on the power supply's front panel. When the MicroRack is plugged in and switched on, the power supply will light the red LED on its front panel. Since the
MicroRack is a "hot-swappable" rack, you don't have to install any cards before switching on the power supply. Also, the power supply may be switched off at any time without harming the installed cards,
and you can install or remove cards without turning off the power supply. However, you should always unplug the power cord before removing, replacing, or switching the power supply or its fuses.
