Emerson operation manual Powering the E2, Add-On E2 Peripherals

4.1.3Power Interface Board (PIB)

Figure 4-3- Power Interface Board

The PIB interfaces the power and most all communica- tions with the main board, and contains all field wiring connections.

4.2Powering the E2

Starting at the lower right side of the PIB, the first plug is the 24VAC input. This must terminate into the power supply transformer.

E2 requires 24VAC Class 2 power, which is supplied by a non-center-tapped Class 2 transformer.

Emerson Retail Solutions supplies two transformers that may be used to power E2s: one for use with 110VAC (P/N 640-0041), and one for use with 220VAC (P/N 640- 0042). Both transformers are rated at 50VA, and each will power one E2 unit.

4.2.1RS485 Ports

On the lower left side of the PIB are two RS485 Net- work connector ports. This is where all I/O boards (except the case controllers, TD3, ESR8, and Echelon I/O boards) are connected.

4.2.2RS485 Termination Jumpers (MODBUS or I/O Net)

There is one set of RS485 jumpers for each RS485 port (COM2A-2B; COM6; and COM4A-B). Jumpers J8-J10 are located directly above the COM2A connector port, and jumpers J11-J13 are located directly above the COM2B port. The RS485 termination jumpers (J8-J22) are used to terminate the devices at the beginning and end of an RS485 Network. If the E2 is the beginning of all RS485 I/O or MODBUS Networks, all three of these jumpers

should be set to the UP position. For MODBUS, the jump- ers should all be in the top-most position (MOD). For I/O Net, the jumpers should be in the middle position (I/O).

For no termination, set the jumpers to the down position (NO).

4.2.3Echelon Network Connect

The next connector is the Echelon Network plug. The one connector handles both input and output connections. The input and output cables are connected directly to the Echelon plug. This plug is the connection to the Case Con- troller (CC-100), the Evaporator Stepper Regulator board (ESR8), TD3s, and other E2s.

4.2.4Echelon Jumper

There is one Echelon jumper (J2) located on the Eche- lon board that plugs into the main processor board.

Additional information about Echelon Networking and terminating the network can be found in Section 8.3, Ech- elon Network Structuring (Daisy-Chains).

4.3Add-On E2 Peripherals

The E2 has many plug-in card options to choose from:

•Plug-in Echelon card with mounting screw

•RS485 Modem/communication expansion card

•Plug-in digital I/O Network card

•Plug-in Four-Channel Internal Repeater

4.3.1Echelon Plug-In Card Kit (P/N 638-4860)

Figure 4-4- Echelon Card

Echelon is a two-conductor network that interconnects E2s and other associated devices. All Echelon devices are wired together using the daisy-chain method of network structuring. For the E2 to communicate on the Echelon

4-2 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013