ABB ACH550 series - E-Clipse Bypass Control Unit Connections (RBCU); Technical Data (Continued); (Supplement to ACH550-UH Users Manual)

96 E-Clipse Bypass Configurations for ACH550 Drives
Technical Data
E-Clipse Bypass Control Unit Connections (RBCU)
(Supplement to ACH550-UH User’s Manual)
Control cable requirements for connections to the E-Clipse Bypass (RBCU) (X2) are
the same as those described for the ACH550 control panel (X1). Refer to the
ACH550 User’s Manual.
Bypass Control Unit Connection Specifications
WARNING! Relay coils generate noise
spikes in response to steps in applied
power. To avoid drive damage from such
spikes, all AC relay coils mounted across
control panel inputs require R-C snubbers,
and all DC relay coils mounted across
control panel outputs require diodes – see
figure.
Bypass Control Unit Terminals
The following table provides specifications for the E-Clipse Bypass’s control unit
terminals
Control Connection Specifications
Digital Inputs Digital input impedance 1.5 k. Maximum voltage for digital inputs is 30 V AC/DC
Relays
(Digital Outputs)
• Max. contact voltage: 30 V DC, 250 V AC
• Max. contact current / power: 6 A, 30 V DC; 1500 VA, 250 V AC
• Max. continuous current: 2 A rms (cos . = 1), 1 A rms (cos . = 0.4)
• Minimum load: 500 mW (12 V, 10 mA)
• Contact material: Silver-nickel (AgN)
• Isolation between relay digital outputs, test voltage: 2.5 kV rms, 1 minute
Frame Size
Control
Maximum Wire Size Torque
mm
2
AWG Nm lb-ft
All 0.12…2.5
26…14 0.4 0.3
33 Ohm
0.47 uF
AC Coil
Control
Typical R-C
Snubber
DC Coil
Diode
+
-
Panel
Inputs
Control
Panel
Outputs