4
ControlNet Repeaters
Rockwell Automation Publication 1786-PC001B-EN-P - January 2015
3. Attach the V
in
+ wire to one of the V
in
+ terminals on the RTB.
4. Tighten the screws to 0.6…0.8 N•m (5…7 lb•in).
5. Attach the V
in
- wire to one of the V
in
- terminals on the RTB.
6. Tighten the screws to 0.6…0.8 N•m (5…7 lb•in).
7. Install the RTB onto the repeater adapter module.
8. Tighten the screws to 0.6…0.8 N•m (5…7 in•lb).
9. Connect the repeater adapter module to the ControlNet network by connecting the drop line of the coax tap to the BNC
connector.
If the adapter has dual ports, connect both ports.
10. Terminate any unused coax ports by connecting a 75 W terminator to the unused BNC connector.
One 75
Ω
terminator is shipped with the repeater adapter module.
Connect a 1786-RPCD Dual Copper Repeater Module
If you need to connect only one coax channel on the 1786-RPCD module, you can use either channel 1 or channel 2. Both
channels 1 and 2 operate identically and can be used interchangeably. Be sure to terminate the unused channel with a
75
Ω
terminating resistor (catalog number 1786-XT).
1. Connect the ControlNet tap to port #1.
2. Align the knob of the BNC cable connector with the locks of the BNC module connector, and insert the connector into
channel 1.
3. Twist the BNC connector until the bayonet lug is locked into place.
4. To connect channel 2, repeat Step 1 for channel 2. If channel 2 is not used, connect a 75-
Ω
terminating resistor (catalog
number 1786-XT) to the port labeled channel 2.
Connect a 1786-RPFS Fiber Module
This module requires a pre-terminated zipcord wiring kit. The kits are offered in a variety of lengths. Consult with your local
distributor for attenuation specifications before you purchase your fiber media components.
The zipcord uses a duplex cable that contains two separate fibers, one for transmit and one for receive. If you are wiring
only one channel, you can use either channel 1 or channel 2.
1. Remove protective caps from ports that require a connection and save the caps for future storage protection.
2. Hold down the latch and insert the channel 1 zipcord connector into the A and B connectors until the pins and latch lock
into place.
Make certain you insert the blue pin, receive, of the zipcord connector in A and the black pin, transmit, into B.
3. Hold down the latch and insert the other end of the duplex cable into another module by using either channel 1 or
channel 2 of the other module.
Connect a 1786-RPFM, 1786-RPFRL/B, 1786-RPFRXL/B Fiber Module
If you are wiring only one channel, you can use either channel 1 or channel 2.
Follow these steps to connect to channel 1, receive (RX).
1. Remove protective caps from ports that require a connection, and save for future storage protection.
2. Align the knob of the cable connector with the groove of the module connector.
3. Insert the connector into channel 1 RX.
4. Twist the receive connector until the bayonet lug locks into place.
5. Repeat these steps to connect to channel 1, transmit (TX).
IMPORTANT
The unused V
in
+ and V
in
- terminals can be used to supply power to other devices. However, the
total current draw on daisy-chained power connections through any single 1786-RPA module
cannot exceed 10 A.
V
in
+ and V
in
- Terminals
31492-M
75
Ω
terminator
Tap
BNC connector
IMPORTANT
The duplex cable is manufactured with the fiber reversed on opposite ends. This automatically
connects channel A of one unit to channel B of the other. Do not connect more than one duplex fiber
or two simplex fibers between the same modular repeaters, even if they are from different modules
on the same repeater.
ATTENTION:
Under certain conditions, viewing the optical port may expose the eye to hazard. When viewed
under some conditions, the optical port may expose the eye beyond the maximum permissible exposure
recommendations
ATTENTION:
Under certain conditions, viewing the optical port may expose the eye to hazard. When
viewed under some conditions, the optical port may expose the eye beyond the maximum permissible
exposure recommendations.
IMPORTANT
Be certain the fiber cable you connect to channel 1 (receive) on one module is set to channel 1 (transmit)
on the other module. You can use channel 1 or channel 2 on either module.
30079
Channel 1, A and B
Channel 2, A and B