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5 Electromechanical Bypass (EMB2) Operation
5.1.1 Typical Control Connections for Common HVAC Applications
Drive Terminal Parameter Number Parameter Name Value Number Value Name Function
27 500 Digital I/O Mode 0 PNP External Interlock
27 501 Term 27 mode 0 Input External Interlock
29 502 Term 29 Mode 1 Output Auto Bypass
18 510 Term 18 digital input 8 Start Common run/stop
19 511 Term 19 digital input 52 Run Permissive Run Permissive
27 512 Term 27 digital input 7 External Interlock External Interlock
29 531 Term 29 digital output 160 No Alarm Auto Bypass
01 & 02 540 [0] Relay 1 function 167 Start Command Active Run Permissive
01 & 02 540 [0] Relay 1 off delay 0.00 seconds Off Delay Run Permissive
Table 5.1 EMB2 Default Parameter Settings for Common HVAC Applications
If the drive is reinitialized, be sure that these settings are maintained or reset for proper bypass.
Name Function Drive Terminals EMB2 X59 EMB2 X55
Remote Drive Start (with common start/stop) Input Command 3, 4
Remote Drive Start (without common start/stop) Input Command 13, 18
Motor Running on Drive Output Status 04, 05, 06
Run Request (for run permissive) Output Command 11, 12
Run Enable (for run permissive) Input Command 1, 2
Safety Stop Input Command 5, 6
Drive Fault Output Status 5, 6, 7
Fire Mode Input Command 7, 8
Drive Mode Output Status 1, 2
Bypass Mode Output Status 3, 4
Fire Mode Output Status 9, 10
Table 5.2 Common Functions for Controlling Motor using Bypass and Typical Terminal Connections.
Commands enable drive functions. Status reports describe conditions, but do not enable a function.
Electromechanical Bypass (EMB2) Operation
BAS-SVX49A-EN 5-1