Emerson E2 operation manual Two-Channel and Four- Channel Repeaters, Mounting Repeaters Overview

3.4.1Two-Channel and Four- Channel Repeaters

3.4.1.1Mounting 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).

3.4.1.2Mounting 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.

3.4.1.3Mounting 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

3-6 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013