WaveWare Adaptive Serial LED Clock - Manual (Page 15)

ALPHA Serial Clock Manual
9
Using end-of-line terminators with serial clocks
End-of-Line (EOL) Terminators help provide stable transmissions
across an RS485 network. They should be inserted into the RJ11 ports on
the last EMC or the last clock on an RS485 transmission line. Before
inserting an EOL Terminator into the RJ11 port on a serial clock, the J5
jumper on the serial clock needs to be moved. EOL Terminators (p/n
1088-9107) must be ordered separately.
To change the location of the J5 jumper:
1. Unplug the adapter from the wall outlet. Use a Phillips screwdriver to remove the
back plate from the serial clock.
2. Locate the J5 jumper on the backside of the serial clock (See Figure 5: Location of
DIP Switches and J5 Jumper).
3. Use your fingers or a needle-nose pliers to carefully remove the jumper from
positions 1 and 2 (See Figure 5: Location of DIP Switches and J5 Jumper). Make
sure not to drop the jumper because it could fall into the serial clock’s case. Place
the jumper into positions 2 and 3.
4. Reattach the back plate to the serial clock.
5. The EOL terminator must be inserted into the RJ11 port on the left, closest to the
DIP switches (See Figure 5: Location of DIP Switches and J5 Jumper).
6. Plug the adapter into a 120V outlet.
7. For more information on using EOL terminators, consult the Network
Configurations (P/N 9708-8046).
J5 Jumper—enlarged, side view
The J5 jumper must be moved from
positions 1 and 2 to positions 2 and 3.
DIP Switches
RJ11 Jacks The EOL Terminator must be
inserted into this RJ11 jack.
Figure 5: Location of DIP Switches and J5 Jumper
J5 Jumper
1 2 3