Electrical Installation 2 - 9
Annunciation Contacts
Contacts for customer use are provided and wired to TB1 and TB2 as follows for use as annunciators of Bypass unit operation.
All are 5 amp at 120 VAC contacts.
Programmable Output Relays 1, 2 and 3 may be re-programmed via DIP switches S2 and S3 on the Bypass Control PCB A2.
These relays provide form C “dry contacts” for customer use in annunciation to Building Automation Systems or general duty
in other control logic circuits. Each contact is rated for 5 amps at 120 VAC.
The additional programmable output relay functions are described in the table below:
Table 2.4 Output Relays - Factory Defaults
Function
Name (E7N-00)
Terminal Block
Terminals
Type
Motor Run
Motor Run *
TB1
10-11
Form A
Hand Mode
Relay 1 @
TB1
12-13-14
Form C
Auto Mode
Relay 2 @
TB2
1-2-3
Form C
System Fault
Relay 3 @
TB2
4-5-6
Form C
* = Dedicated
@ = Programmable
Table 2.5 Programmable Output Relay Functions
Function
Description
Factory Default
Bypass Run
Annunciates running in Bypass mode
No
Damper Actuator
Intended to close a contact in a damper actuator circuit
whenever the motor is commanded to run (operation similar
to the dedicated “Motor Run” relay)
No
Auto Transfer
Annunciates automatic transfer to Bypass operation due to a
Drive fault
No
Drive Run
Annunciates running in Drive mode
No
Serial Com Run
Annunciates that the run command is coming from serial
communications
No
Hand Mode
Annunciates that the Drive or Bypass is being operated in
Hand (local) mode
Relay 1
Auto Mode
Annunciates that the Drive or Bypass is being operated in
Auto (remote) mode
Relay 2
System Fault
Annunciates that a Drive, motor overload or control circuit
fault has occurred
Relay 3
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