MJ-X
L
Communications Module
9
5 Installing the Communications Module in MJ-X Control Panels
The MJ-X
L
Communications Modules are installed in the Accessory Section on the back of the MJ-X Control
Panel. Before installing the communications module, set the jumpers on the communications module printed
circuit board for proper operation. Install the communications module in the MJ-X, connect the cables, and test the
unit. Once these tasks have been performed the system is ready for operation. The following sections describe how
to set the jumpers and install the communications module.
5.1 Setting the Communications Module Jumpers
Prior to installing the communication module into the MJ-X Control Panel, ensure that the jumpers are properly
installed on the printed circuit board. Jumper selections for the Fiber Optic version and RS232/485 version are
described in separate sections below.
5.1.1
Fiber Optic Version
The jumper locations on the fiber optic version are shown in Figure 5-1. 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 5-1.
Set Auto Repeat to no repeat when only one unit is installed in the network.
J11
J10
J12
1 2
J14
1
2
3
1
2
J11
1
2
3
J10
J12
J14
Figure 5-1 Fiber Optic Version
Figure 5-2 RS-232/485 Version
Jumper Locations
Jumper Locations
