Patton electronic 2500RC, 2520RC Rear Card Configuration, Model 1000RCM12548 Strap Settings

3.3 REAR CARD CONFIGURATION

The Model 2500RC Series has two interface card options: the Model 1000RCM12548 (DB-25/RJ-48S) and the Model 1000RCM13448 (M/34/RJ-48S). Each of these options supports one interface connection and one 4-wire connection. Figure 5 (below)

3.3.1 Model 1000RCM12548 Strap Settings

Figure 7 shows strap locations for the Model 1000RMC12548 (DB-25/RJ-48S) rear cards. These straps determine various grounding characteristics for the terminal interface and twisted pair lines.

illustrates the two different interface options for the Model 2500RC Series.

ModelModel

1000RCM12548 1000RCM13448

JB2

(NOT USED)

JB3

(peg 1 on top)

JB4

(peg 1 on left)

DB-25 F M/34 F

Figure 5. Model 2500RC Series interface card options

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. To configure the rear cards, you must set the configuration straps. Figure 6 (below) shows the orientation of these straps. Each strap can either be on pegs 1 and 2, or on pegs 2 and 3. Sections 3.3.1 and 3.3.2 describe the strap locations and possible settings for each rear card.

Figure 6. Orientation of interface card straps

Figure 7. DB-25/RJ-48S strap locations

The table below provides an overview of interface strap functions for the rear interface cards. Following this overview is a detailed description of each strap’s function.

INTERFACE CARD STRAP SUMMARY TABLE #1

Strap	Function	Position 1&2	Position 2&3
JB3	DTE Shield (Pin1) & FRGND	Connected	Open*
JB4	FRGND & SGND	Connected	Open*

DTE Shield (Pin 1) & FRGND (JB3)

In the connected position, this strap links DB-25 pin 1 & frame ground. In the open position, pin 1 is “lifted” from frame ground.

JB3

Position 1&2 = DTE Shield (Pin 1) and FRGND Connected Position 2&3 = DTE Shield (Pin 1) and FRGND Not Connected

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