Figure 8 (below) provides an overview of interface jumper functions
for the rear interface cards. Following this overview is a detailed
description of each jumper’s function.
Line Shield & FRGND (JB2)
This jumper affects the line interface. In the connected (closed)
position, it links RJ-11 pins 1 & 6, or RJ-45 pins 2 & 7 to frame ground.
These pins can be used as connections for the twisted pair cable shield.
In the open (disconnected) position, pins 1 & 6 (or 2 & 7) remain
connected to each other, but are “lifted” from the frame ground.
JB2
Position 1&2 = Line Shield and FRGND Connected
Position 2&3 = Line Shield and FRGND Not Connected
DTE Shield & FRGND (JB3)
In the connected position, this jumper links DB-25 pin 1 & frame
ground. In the open position, pin 1 is “lifted” from frame ground.
JB3
Position 1&2 = DTE Shield (DB-25 Pin 1)
and FRGND Connected
Position 2&3 = DTE Shield (DB-25 Pin 1)
and FRGND Not Connected
SGND & FRGND (JB4)
In the connected position, this jumper links DB-25 pin 7 Signal
Ground) and frame ground. In the open position, pin 1 is “lifted” from
frame ground.
JB4
Position 1&2 = SGND (DB-25 pin 7)
and FRGND Connected
Position 2&3 = SGND (DB-25 pin 7)
and FRGND Not Connected
10
Interface Combination
Model Number
DB-25 & RJ-11
1000RCM12511
DB-25 & RJ-45
1000RCM12545
RJ-11 & RJ-45
1000RCM1D11
Dual RJ-45
1000RCM1D45
Prior to installation, you will need to examine the rear card you
have selected and make sure it is properly configured for your
application. Each rear card is configured by setting straps located on
the PC board. Section 3.5.1 describes the strap locations and possible
settings for each rear card.
3.2.1 REAR CARD JUMPER SETTINGS
Figure 6 (below) shows jumper locations for the four rear card
options. These jumpers determine various grounding characteristics for
the RS-232 and twisted pair lines.
Figure 7 (below) shows the orientation of the rear interface card
jumpers. The jumper can either be on pegs 1 & 2, or on pegs 2 & 3.
9
INTERFACE CARD STRAP SUMMARY TABLE #1
Strap
Function
Position 1&2
Position 2&3
JB2
Line Shield & FRGND
Connected
Open*
JB3
DTE Shield (Pin1) & FRGND
Connected
Open*
JB4
FRGND & SGND
Connected
Open*
Figure 8. Summary of strap settings, * indicates factory default
Figure 6. Rear card jumper locations
JB2
(peg 1 on left)
JB3
(peg 1 on top)
JB4
(peg 1 on left)
Figure 7. Orientation of interface card straps
1
2
3
1
2
3
1
2
3
