3.5 Bypass PCB Control Circuit
96 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
â—† Bypass Serial Communication Terminals
Table 3.18 Bypass Serial Communication Terminals (TB3)
Type Terminal Terminal Name Function (Signal Level)
Serial
Communication
TB3-1
IG5
Isolated ground
Ground reference for RS-485 signals. This is an isolated ground used only for communications and may be used in
certain circumstances to connect the floating ground references of other communication devices.
TB3-2
TXRX+
(+) Differential
communication signal
• BACnet communications
• APOGEE FLN communications
• MEMOBUS/ Modbus communications
• Metasys N2 communications
Use an RS-485 cable to connect the drive.
Note:
Make sure that DIP switch S1 is ON to enable the
termination resistor in the last drive in a BACnet,
APOGEE FLN, MEMOBUS/ Modbus, or Metasys
N2 network.
• RS-485
• BACnet communications: Maximum 76.8 kbps
• APOGEE FLN communications: 4.8 or 9.6 kbps
• MEMOBUS/Modbus communications: Maximum
115.2 kbps
• Metasys N2 communications: 9.6 kbps
TB3-3
TXRX-
(-) Differential
communication signal
TB3-4
SHIELD
Shield tie point Capacitively coupled to chassis ground.
â—† Switches on the Bypass PCB
The bypass PCB has switches to adapt the bypass I/Os to the external control signals as shown in Figure 3.11.
Set the switches to select the functions for each terminal.
Figure 3.11 Locations of Switches
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