Two-Channel And Four-Channel Repeaters; Mounting Repeaters Overview; Mounting The Two-Channel Repeater; Mounting The Four-Channel Repeater - Emerson E2 Installation And Operation Manual

3.4.1 Two-Channel and Four-
Channel Repeaters
3.4.1.1

Mounting Repeaters Overview

Repeaters are used to extend the maximum length of a
segment of Echelon cable, or to act as a bridge between
two devices that are farther apart than the cable's maxi-
mum node-to-node distance. Emerson Retail Solutions
offers two versions of repeaters for the E2 controller: an
external two-way repeater that comes in an enclosure (P/N
832-1010), and a four-channel repeater mounted in the E2
(P/N 638-4830).
For more information about installing repeaters and
routers, please refer to the Repeater and Router Installa-
tion and Networking Guide (P/N 026-1605).
3.4.1.2 Mounting the Two-Channel
Repeater
The external repeater (P/N 832-1010) is externally
mounted within its own enclosure.
Figure 3-17
- External Repeater Mounting
For external repeaters, the mounting bracket at the bot-
tom of the enclosure has two 0.156" bolt holes on either
side. Use the bolt holes to mount these repeaters in the
field as necessary (see Figure 3-17).
When mounting external repeaters, keep in mind that
they require a 24VAC Class 2 power source in order to
operate. This will likely require a transformer such as P/N
640-0041 (110V) or P/N 640-0042 (220V) to be mounted
near the external repeater enclosure. Make sure there will
be enough space next to the repeater to mount the trans-
former.
•
3-6 E2 RX/BX/CX I&O Manual
3.4.1.3 Mounting the Four-Channel
Repeater
The four-channel repeater (P/N 638-4830) serves the
same basic function as the two-channel repeater: boosting
signal strength. However, the four-channel repeater is also
useful as a means of connecting the E2 to its associated
devices using more than one daisy chain.
With a four-channel repeater mounted in the E2, you
can run as many as three daisy chain segments out into the
field, each of which can be as long as the prescribed Eche-
lon maximum wire length. The fourth channel of the
repeater can be used to connect other E2s in a separate
daisy-chain, eliminating the need to run cable from the
field back to the next E2.
The standoffs and mounting holes are located above
the PIB in the back of the enclosure box. Use the mounting
screws and standoffs to secure the four-channel repeater in
place, and connect the repeater to the PIB with the two-pin
power connector located next to the battery.
NOTE: Because the modem/communication
expansion card and four-channel repeater card
share the same mounting platform, they must
be used separately.
Figure 3-18
- E2 Repeater Mounting
026-1614 Rev 4 5-JAN-2013