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Installation Instructions IM584000300
Spec. No. 584000300 (Model 4015-X003) Issue AB, April 3, 2013
Chapter 3. Making Electrical Connections Page 35
This document is property of Emerson Network Power, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by Emerson Network Power, Energy
Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
IB2 (ACU+ Controller Interface Board) Connections (if required)
The IB2 (ACU+ Controller Interface Board) provides connection points for digital inputs,
programmable relay outputs, and temperature probes. The IB2 interface board is
accessed from the front of the power and control sub-rack. Loosen the two captive
fasteners and slide the tray the IB2 assembly is mounted to out far enough to make the
electrical connections. Refer to Figure 3-14.
When connecting input and output wires to the IB2 board, route the leads through the
opening provided on the top of the power and control sub-rack for I/O wiring (see Figure
3-14), through the I/O wiring cable tray, and out to the IB2 assembly at the front of the
system.
Note: The IB2 board is isolated from the system’s 400VDC bus and the internal 48V
bias supplies. If a voltage potential is required to be connected to digital inputs
and/or relay contacts, customer must supply the voltage source.
Digital Inputs and Programmable Relay Outputs
Digital input and relay output leads are connected to screw-type terminal blocks located
on the IB2. Recommended torque for these connections is 2.2 in-lbs (0.25 Nm). Refer to
Table 3-1 and Table 3-2 for pin-out information.
Digital Inputs
Connect up to eight (8) digital inputs to the IB2 (ACU+ Controller Interface Board). Note
that you must supply both paths for the digital input (either a positive or negative signal
and the opposite polarity return path). Observe proper polarity. Refer to Figure 3-14 for
terminal locations and Table 3-1 for pin-out information.
The digital inputs can be programmed to provide an alarm when the signal is applied
(HIGH) or removed (LOW). Refer to the ACU+ Controller Operation Instructions
(UM1M820NNB-1) for programming information.
Digital Input Ratings: Refer to the following.
a) Maximum Voltage Rating: 60V DC.
b) Active High: > 19V DC.
c) Active Low: < 1V DC.
Programmable Relay Outputs
The IB2 provides eight programmable alarm relays with dry Form-C contacts. Refer to
the ACU+ Controller Operation Instructions (UM1M820NNB-1) for programming
information. Connect up to eight (8) relay outputs to the IB2. Refer to Figure 3-14 for
terminal locations and Table 3-2 for pin-out information.
Relay Ratings: Refer to the following.
a) 1A Steady State @ 30V DC.
b) 3A Peak @ 30V DC.