3.2 REAR CARD CONFIGURATION
The Model 1004ABRC has two interface card options: the 1Q11 (which comes equipped with two
The table below provides a summary of the strap functions for both of the rear cards. Following the table is a description of each strap's function.
INTERFACE CARD STRAP SUMMARY TABLE #1
Strap | Position 1&2 | Position 2&3 |
1Q11
Twisted Pair | } | |
| ||
|
| |
Line Connection |
| |
|
| |
|
| |
} | ||
Connection | ||
|
1Q45
Twisted Pair Line
Connection
Connection
JB2 | Line A Shield | No Shield† |
JB4 | Line B Shield | No Shield† |
|
|
|
JB5 | SGND & FRGND | Open† |
JB6 | DTE A DSR† | N/A |
|
|
|
JB7 | DTE B DSR† | N/A |
Line A Shield & Line B Shield (JB2 & JB4)
This strap pertains to the line interface. In the connected (closed) position, the strap links
Figure 3. Model 1004ABRC interface card options
Prior to installation, you should examine the rear card you have selected and ensure that it is suitable for your application. Each rear card is configured by setting straps on the PC board. Section 3.4.1 describes the strap locations and settings for each card.
3.2.1 REAR CARD STRAP SETTINGS
Figure 4 (below) shows the strap locations for the 1Q11 and the 1Q45 rear cards. These straps determine various grounding character- istics for the RS-232 and twisted pair lines.
pair cable shield. In the open (disconnected) position, pins 1 and 6 (or 2 and 7) remain connected, but are “lifted” from frame ground.
JB2
Position 1&2 = Line A Shield Connected
Position 2&3 = No Shield
JB4
Position 1&2 = Line B Shield Connected
Position 2&3 = No Shield
SGND & FRGND (JB5)
JB7
JB2 12
3
JB4
1
JB5 12
3
| JB6 | ||
1 2 3 | 1 |
|
|
2 |
|
| |
| 3 |
|
|
(Unit A)
(Unit B)
(Unit A)
(Unit B)
}
}
Twisted Pair Line
Connection
Connection
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
Figure 4. Strap locations for both rear cards
11 | 12 |