Setting The Communications Module Jumpers; Fiber Optic Interface; Rs-232/485 Interface; Figure 4-3 Fiber Optic Interface Jumper Locations - Siemens MJ-4 Series Installation Manual

4.3 Setting the Communications Module Jumpers

Prior to installing the Communications Module into the MJ-4 Control Panel, ensure that the jumpers are properly
installed on the printed circuit board. Jumper selections for the Fiber Optic interface and RS232/485 interface are
described in separate sections below.

4.3.1 Fiber Optic Interface

The jumper locations for the fiber optic interface are shown in Figure 4-3. The view of the module is from the
component side. The fiber optic receiver (RX) and transmitter (TX) are shown for reference. The jumper settings
are listed in Table 4-1.
Set Auto Repeat to "No Repeat" when only one unit is installed in the network.
Jumper Name
J14 Auto Repeat
J12 Range
Note 1: Default pin settings are shown in bold text.
Note 2: If 50/125 µm cable is used, J12 must be jumpered (In).

4.3.2 RS-232/485 Interface

Figure 4-4 shows the jumper locations for the RS-232/485 interface, viewed from the component side. Jumpers and
their default settings are listed in Table 4-2.
6
1
J14
2
3

Figure 4-3 Fiber Optic Interface Jumper Locations.

Table 4-1 Fiber Optic Interface Jumper Settings

Position Function Selected
Auto Repeat
1-2
2-3 No Repeat
Out No Repeat
Normal
Out
In Long
J14
Figure 4-4 RS-232/485 Interface Jumper Locations.
J10
J11
2
J12
1
State Description
Repeat message from Host and any responses from
other IEDs (Auto repeat for mark 0 or mark 1)
Transmit continuously ON (for testing) (Force 0)
Only transmit a response if being addressed by Host
(no jumper installed at 1-2 or 2-3) (Force 1)
Set Low Power Transmitter Output
Set High Power Transmitter Output (See Note 2)
1
2
1
J10 2
J11
3
J12