Emerson 400A Installation, continued, Engine Starting Contacts, Harnesses, Auxiliary Circuits

INSTALLATION	(continued)
Engine Starting Contacts	Controller Ground

The engine control contact connections are located on the transfer switch. Connect signal wires to appropriate term– inals as specified in Table A, shown in Figure 1–2.

Table A. Engine start connections.

When normal source	Terminals on transfer
fails	switch
contact closes	TB14 and TB15
contact opens	TB14 and TB16

Transfer Switch

Figure 1-2. Engine starting contact label and location

for 260 and 400 ampere transfer switches.

A grounding wire must be connected to the controller’s lower left mounting stud. Because the controller is mounted on the enclosure door, a conductive strap must be used between the enclosure and the door. This connection provides proper grounding which does not rely upon the door hinges.

Harnesses

The transfer switch is connected to the left side of the controller by a plug–in harness (two plugs).

Auxiliary Circuits

Connect auxiliary circuit wires to appropriate terminals on transfer switch. Note the control features that are furnished on this switch. Make the necessary auxiliary connections by referring to Section 5, Control Features.

Connections to Controller for other Control Features (located on bottom of Controller):

Load Disconnect	Programmable	Remote Control Features Connections
Feature	Engine Exerciser
		(refer to the Wiring Diagram &
Connections	connection,
		page 5–5 for DIP switch settings)
(see Wiring Diagram	if provided
		Each control contact must be suitable	for factory
& refer to page 5–5	(refer to
		for a 5 V DC low energy circuit.	use only
for DIP switch settings) page 5–2)

Figure 1-3. Input / output label on the Controller showing possible connections to the lower terminal block.

1---2