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Bypass Unit Operation Description
(For selector key positions, control inputs and DIP switch selectable functions.)
The Bypass has two modes of operation: Bypass and Drive. When in the Bypass mode the connected motor is run directly
from the incoming AC line, whereas in Drive mode the motor is run from the Drive output. The DRIVE Select and Bypass
Select keys located on the front panel determine the operating mode. Within each operating mode are two methods of control;
HAND and AUTO. The HAND/OFF/AUTO selector keys on the front panel determine this control method.
Table 4.1 provides a look at various combinations of the control panel selector key positions, control inputs to TB1 through
TB5 and the status of the DIP switch selectable functions.
Selector Buttons
Contact Closure Inputs
Drive or
Auto
H/O/A
Bypass
Test/
Run
Select
Select
Normal
TB1 2&9
1
O
Drive
2
O
Drive
3
O
Drive
4
H
Drive
5
H
Drive
6
H
Bypass
N
7
H
Bypass
T
8
H
Bypass
N
9
H
Bypass
N
10
H
Drive
11
H
Drive
12
H
Drive
13
H
Drive
14
A
Drive
0
15
A
Drive
X
16
A
Drive
X
17
A
Drive
X
18
A
Drive
X
19
A
Drive
X
20
A
Drive
X
21
A
Bypass
N
X
22
A
Bypass
T
X
23
A
Bypass
N
X
24
A
Bypass
N
X
25
A
Bypass
N
X
26
O
Drive
27
O
Bypass
N
28
A
Drive
X
29
A
Bypass
N
X
30
H
Drive
31
O
Drive
32
H
Bypass
N
33
A
Drive
X
Note: A blank cell indicates the input can be in any of the possible positions (don't care).
Definitions:
TB = Terminal Block
SX-X = DIP Switch Number
X = Closed Input Contacts
0 = Open Input Contacts
D = Disabled
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Table 4.1 E7L 2 Contactor Bypass Inputs and Operating Modes
DIP Switch Selectable Functions
Remote
Smoke
Auto Xfer
Xfer
Purge
DIP
Drive
TB1 4&9
TB1 5&9
S2-1
Fault
0
0
D
0
0
D
0
0
D
0
0
D
0
0
D
0
0
D
0
0
D
0
0
D
0
0
D
X
0
D
0
X
D
0
0
E
X
0
0
E
0
0
0
D
0
0
D
0
0
D
0
0
D
X
0
D
0
X
D
0
0
E
X
0
0
D
0
0
D
0
0
D
0
0
D
0
X
D
0
X
D
0
X
D
0
0
D
0
0
D
0
0
D
0
0
D
0
0
D
0
0
D
Start Up and Operation 4 - 10
Safety
Damper/BAS
Motor O/L
DIP
DIP
S2-7
TB1 1&9
S2-8
TB1 3&9
E
X
E
X
X
E
0
X
X
E
0
X
X
E
0
X
X
X
X
X
X
X
X
X
X
E
0
E
0
X
X
E
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
E
0
X
X
E
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
E
0
X
X
0
X
X
X
X
X
X
X
X
X
X
X
X
0
X
X
0
X
X
0
D
D
X
D
D
X
D
D
X
Control Panel LEDs
Status LEDs
Operating
System
Mode
Safety
Auto/Rem
Damper/
Result
Open
Xfer
BAS
Auto Run
None
None
On
None
None
On
Drive
Bypass
Bypass
None
On
None
On
Bypass
On
Bypass
Bypass
Flash
Drive
None
Drive
None
On
None
On
Bypass
On
Bypass
Bypass
Flash
Bypass
Bypass
None
On
None
On
Bypass
Bypass
Bypass
None
None
None
None
Bypass
Drive
On
On
On
On
On
On
On
On
On
On
On
On
On
On
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