4
wiring
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
X2
RBIO-01
BYPASS CONTROL BOARD
1PCB
+24 VDC
+24 VDC
DCOM
GND
DI1 STAR/STOP
DI2 NOT SEL
DI3 SAFETY INTERLOCK
DI4 NOT SEL
DI5 NOT SEL
DI6 OVERRIDE 1
RELAY OUTPUT 1
BYP NOT FLT
RELAY OUTPUT 2
SYS RUNNING
RELAY OUTPUT 3
SYS STARTED
RELAY OUTPUT 4
BYPASS SEL
RELAY OUTPUT 5
BYPASS AUTO
X2
X2
RS 485 CONNECTION
SCR
B+ SW1 1
A- 2
ANGD
SCR
26
27
28
J3
A
B
COM
DIP SWITCH
CONSULT MANUAL
FOR SETTING
J5
1-20
SLOT 1
COOLING TOWER N.C.
VIBRATION SWITCH
COMM.
BYPASS
KEYPAD
COMM.
BYPASS
DISPLAY
ON
ON
Two-Wire Control Circuit using an SPST Switch
Typical connection points for the IMI 686B vibration switch used with the
E-Clipse bypass terminal strip of an ABB ACH550 VFD.
Breaking the control circuit between points 1 and 7 will disable VFD and bypass
operation. To reset the vibration switch remove incoming power to the VFD,
wait a minute or two allowing the VFD capacitors to discharge then reapply
power. At this point the switch will be in a closed state allowing VFD operation.
