Building automation system run/stop circuit, Safety interlock circuit – Yaskawa E7B Drive Bypass System User Manual
Page 6
Yaskawa Electric America, Inc.
Installation Guide IG.E7B.02 Rev: 04-11
Date: 11-1-04 Page 4 of 46
Building Automation system Run/Stop circuit:
A control terminal block position (TB1, terminals 2 and 9) is provided to connect the Normally Open (NO) Run/Stop
contact from a BAS or other remote controller for auto mode control.
There must be continuity between these terminals in order for the motor to run, in auto mode.
Safety Interlock Circuit:
A control terminal block position (TB1, terminals 1 and 9) is provided to connect the series circuit of Normally
Closed (NC) safety devices such as: freeze up thermostats, smoke/fire sensors, high pressure limits, temperature lim-
its or vibration detectors.
On power up the E7B_ _ _T or E7B_ _ _Y will display a red “Safety Open” LED in the “System Status” area of the
front control panel if a normally closed “Safety Circuit” has not been installed between TB1-1 and TB1-9 on PCB
A2. This condition will prevent Drive or Bypass operation.
1 of 3 items needs to be done before the motor can be started:
1)
Install a NC “Safety Circuit” between TB1-1 and TB1-9 on PCB A2.
2)
Install a jumper between TB1-1 and TB1-9 on PCB A2. This method should be used if a “Safety Circuit”
will be added later in the installation.
3)
De-activate these terminals by moving DIP switch S2-7 to the ON position (toward the enclosure door). This
solution is only suggested if a “Safety Circuit” will never be applied to the drive system.
Building Automation System Interlock Circuit (Drive and Bypass enable
input):
A control terminal block position (TB1, terminals 3 and 9) is provided to connect Normally Open (NO) enabling con-
tacts such as: damper end switches or occupied cycle timers.
When a Run command is received in HAND or AUTO mode, the E7B_ _ _T or E7B_ _ _Y will display a red
“Damper/BAS” LED in the “System Status” area of the front control panel. This condition will prevent Drive or
Bypass operation.
1 of 3 items needs to be done before the motor can be started:
1)
Install a “BAS Interlock Circuit” between TB1-3 and TB1-9 on PCB A2.
2)
Install a jumper between TB1-3 and TB1-9 on PCB A2. This method should be used if a “BAS Interlock
Circuit” will be added later in the installation.
3)
De-activate these terminals by moving DIP switch S2-8 to the ON position (toward the enclosure door). This
solution is only suggested if a “Safety Circuit” will never be applied to the drive system.