Operating Instructions

Hardware

Siemens Building Technologies, Inc. 2-5

Electronic Actuation

The LRC enclosure houses the LCM, one terminal block, and two Autozero Modules. Figure

2-4 shows the LRC components in the enclosure. Pneumatic connections (for flow pickups)

are made on the side of the enclosure via four ports (

Figure 2-5

). In addition to the wiring

diagram provided on the inside of the enclosure cover,

Figure 2-9

shows the connections and

equivalent schematic diagram including the connections to the AO-E modules.

FUM0323R1

AUTOZERO

MODULE

LABORATORY

CONTROLLER MODULE

TERMINAL

BLOCK

AUTOZERO

MODULE

Figure 2-4. LRC Components and Enclosure for Electronic Actuation.

Supply 1 air flow Hi

Exh or Supply 2

air flow Lo

Exh or Supply 2

air flow Hi

Supply 1 air flow Lo

LAB0176R1

Figure 2-5. LRC Pneumatic Connections for Electronic Actuation.

NOTE:

An earth ground is necessary with the LRC to provide resistance to electrical

surges.

LAB0108R1

1 - 1/4

(32)

15/16

(24)

1 - 3/8

(34)

DIMENSIONS IN INCHES

MILLIMETERS IN PARENTHESES

Figure 2-6. Terminal Block.