Emerson E2 operation manual Mounting I/O Boards, Blank Face, Single/Double Enclosures

3.1.4Blank Face

Blank face control is designed to be used in a system with more than one E2. It has no screen or keyboard and is logged into remotely from another E2 on the Echelon net- work. The green General Status LED transmits status information to the user. See Table 2-3 on page 2-3for more information on main board (CPU) status LEDs. Blank face mounting dimensions are identical to the stan- dard and recessed mount boxes. See Figure 3-3and Fig- ure 3-4.

3.2Mounting I/O Boards

The 16AI, 8RO, 8DO, 4AO, 8IO, and MultiFlex boards are usually installed by the refrigeration or building equipment manufacturer. Therefore, the installer need only make the necessary connections between the E2 and the cases, condenser boards, and/or HVAC units.

In some instances, an installer may be required to mount an I/O board. There are no restrictions on the loca- tion of these boards; however, for ease of network config- uration, it is recommended that the boards be located adjacent to the E2. I/O boards may be mounted without an enclosure, but they should be mounted in a location that is not easily accessible to avoid tampering or damage.

3.2.1Single/Double Enclosures

The Single enclosure and Double enclosure are sup- plied with four mounting holes in the rear panel of the enclosure. The mounting holes can be accessed without removing any of the boards inside the enclosure. Figure 3- 7 shows the dimensions and weight for the Single enclo- sure. Figure 3-8shows mounting dimensions for the Dou- ble enclosure. When mounting boards inside the enclosure, refer to Figure 3-9for mounting dimensions

for the MultiFlex, 16AI, 8RO, and the 8DO.

Figure 3-7- Single Enclosure Mounting Dimensions

Figure 3-8- Double Enclosure Mounting Dimensions

Mounting I/O Boards Mounting • 3-3