3
SGND & FRGND (JB5)
In the connected (closed) position, this strap links signal ground
and frame ground. In the open (disconnected) position, pin 1 is “lifted”
from frame ground.
JB5
Position 1&2 = SGND and FRGND Connected
Position 2&3 = SGND and FRGND Not Connected
DTE as DSR or RI (JB6 & JB7)
Because this rear card is designed to function in more applications
than the Model 1000CC, this jumper must be installed only in one
position. Place the jumper across pins 1&2 so that the terminal (DTE)
sees DSR as high when the DTE raises DTR. The other positions,
across pins 2&3, are for Ring Indicate as defined by EIA/TIA-561. The
RI function is irrelevant (and on the Model 1000CC is also
disconnected) and can cause improper operation if the jumper is
installed incorrectly.
JB6 & JB7
Position 1&2 = DSR
Position 2&3 = N/A
4
3.0 CONFIGURATION
The Model 1000CC has no configuration straps or switches, except
those associated with the rear card. These are described below.
3.1 REAR CARD CONFIGURATION
The rear card supplied with the Model 1000CC is equipped with two
modular RJ-45 jacks (see Figure 1, below). The jack labeled “A1” is for
connection to the RS-232 terminal. If the Model 1000CC is being used
in a daisy-chain application, port “B1” provides the link to the next
Model 1000CC in the chain.
3.1.1 REAR CARD STRAP SETTINGS
Figure 2 (below) shows the two possible settings for each strap.
The PC board is labeled with the “123” orientation.
Figure 1. Strap locations for both rear cards
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1 2 3
JB5
JB6
JB7
(Unit B)
(Unit A)
Figure 2. Orientation of interface card straps
1
2
3
1
2
3
1
2
3
