Dip Switch Settings; E-Clipse Bypass Configurations; Circuit Breaker Settings - ABB ACH550-UH HVAC Installation, Operation & Maintenance Manual

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DIP switch settings

The DIP switch is used to configure the serial communications termination resistors.
To reduce noise on the serial communications network, terminate the EIA-485
network using 120 ohm resistors at both ends of the network. Use the DIP switches
to connect or disconnect the on-board termination resistors. Both switches must be
positioned in the ON or OFF position to correctly configure the termination resistors.
Note: When using embedded protocols, set SW1 in the OFF position.

Circuit breaker settings

On some ACH550 E-Clipse Bypasses, the circuit breaker has adjustable settings for
instantaneous current protection. The factory default settings are practical for most
applications. Refer to the "ABB SACE Instruction Sheet" (supplied with these units)
for additional information on the adjustment of these settings.
Operation

E-Clipse bypass configurations

The ACH550 with E-Clipse Bypass is an ACH550 AC adjustable frequency drive in
an integrated UL type 1, UL type 12 or UL type 3R package with a bypass motor
starter. The ACH550 with E-Clipse Bypass provides:
• Disconnect switch or circuit breaker with door mounted control lever. The lever
can be padlocked in the OFF position (padlock not supplied).
• Bypass starter.
• Motor overload protection.
• Local operator panel with indicating lights and multifunction display.
• Provisions for external control connections.
• Embedded communications for major BMS protocols including BACnet, Johnson
Controls International N2, Siemens Building Technologies FLN, and Modbus
• Optional fieldbus adapters for connection to additional BMS protocols including
LonWorks and Ethernet
• Optional drive service switch (drive input disconnect), the functional equivalent of
a three-contactor bypass arrangement.
ACH550 E-Clipse Bypass
ACH550 Installation, Operation and Maintenance Manual