ABB ACH550-VCR User Manual

2-248 ACH550 E-Clipse Bypass User’s Manual
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 Control
terminal descriptions on page 1-316 of the ACH550-UH 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

ABB ACH550-VCR Specifications

General

Brand	ABB
Model	ACH550-VCR
Category	Controller
Language	English