Emerson NetSur 721NPBB Quick Start Manual Download

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NetSure

™

-48V DC Power System

Quick Start Guide, QS582127000 (Issue AC, December 10, 2013)

Spec. No: 582127000

Code: QS582127000

Model No: 721

NPBB

Issue AC, December 10, 2013

[27]

IB2 (ACU+ Interface Board) Connections
(if required) (Main Bay Only)

The IB2 (ACU+ Interface Board) provides connection points for
digital inputs, programmable relay outputs, and temperature
probes. The IB2 interface board is mounted inside the distribution
cabinet. Refer to

Figure 20

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. Refer to

Figure 22

for terminal

locations. Refer to

Table 1

and

Table 2

for pin-out information.

Digital Inputs

Connect up to eight (8) digital inputs to the IB2.  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 22

for terminal locations and

Table

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+
Instructions (UM1M820BNA or UM1M820DNA400) for
programming information.

Digital Input Ratings: Refer to the following.

Maximum Voltage Rating: 60V DC.

Active High: > 19V DC.

Active Low: < 1V DC.

The digital inputs may be preprogrammed for specific functions.
Refer to the configuration drawing (C-drawing) supplied with your
system for your system’s specific configuration.

Programmable Relay Outputs

The IB2 provides eight (8) programmable alarm relays with dry
Form-C contacts. Connect up to eight (8) relay outputs to the IB2.
Refer to

Figure 22

for terminal locations and

Table 2

for pin-out

information.

Refer to the ACU+ Instructions (UM1M820BNA or
UM1M820DNA400) for programming information.

Relay Ratings: Refer to the following.

1A Steady State @ 30V DC.

3A Peak @ 30V DC.

The relays may be preprogrammed for specific functions. Refer to
the configuration drawing (C-drawing) supplied with your system
for your system’s specific configuration.

Temperature Probes

Note:

Each temperature probe consists of two pieces that plug

together to make a complete probe. See SAG582127000 for
part numbers and descriptions.

Temperature probes are connected to the IB2 (ACU+ Interface
Board) and/or optional EIB (ACU+ Extended Interface Board)
mounted inside the distribution cabinet. See

Figure 22

and

Figure

Up to two (2) temperature probes can be connected to the IB2.  Up
to two (2) additional temperature probes can be connected to the
optional EIB.  Any combination of the four (4) temperature probes
can be programmed to monitor ambient temperature and/or
battery temperature. A temperature probe set to monitor battery
temperature can also be used for the rectifier battery charge
temperature compensation feature, or the battery charge
temperature compensation feature can be programmed to use the
average or highest value of all battery temperature probes.  The
battery charge temperature compensation feature allows the
controller to automatically increase or decrease the output voltage
of the system to maintain battery float current as battery
temperature decreases or increases, respectively. Battery life can
be extended when an optimum charge voltage to the battery with
respect to temperature is maintained.  A temperature probe set to
monitor battery temperature can also be used for the BTRM
(Battery Thermal Runaway Management) feature.  The BTRM
feature lowers output voltage when a high temperature condition
exists to control against battery thermal runaway.

The temperature sensor end of the probe contains a tab with a
5/16” clearance hole for mounting.

A temperature probe programmed to monitor battery
temperature should be mounted on the negative post of a battery
cell to sense battery temperature. A temperature probe used for
battery charge temperature compensation and/or BTRM (Battery
Thermal Runaway Management) should also be mounted on the
negative post of a battery cell. A temperature probe programmed
to monitor ambient temperature should be mounted in a
convenient location, away from direct sources of heat or cold.