NetSure
™
-48 VDC Power System
Installation Instructions, IM582127000100 (Revision A, January 9, 2017)
Spec. No: 582127000100, 582127000103
Document Code: IM582127000100
Model No: 7100
Revision A, January 9, 2017
[25]
IB2 (CONTROLLER INTERFACE BOARD) CONNECTIONS
(IF REQUIRED)
The IB2 (Controller Interface Board) provides connection points for
programmable relay outputs, digital inputs, and temperature
probes. The IB2 interface board is mounted inside the distribution
cabinet. Refer to
Programmable Relay Outputs and Digital Inputs
Relay output and digital input leads are connected to screw-type
terminal blocks located on the IB2. Recommended torque for
these connections is 2.2 in-lbs. Refer to
for terminal
locations. Refer to
for pin-out
information.
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
for terminal locations. Refer to
for pin-
out information.
NOTE: The relay assigned to “Critical Summary” alarm
(relay 1 on the IB2 by default) will operate in the “Fail Safe
Mode”. “Fail Safe Mode” means Relay 1 is de-energized
during an alarm condition, opening the contacts
between the C and NO terminals, and closing the
contacts between the C and NC terminals.
The remaining 7 relays energize during an alarm
condition, closing the contacts between the C and NO
terminals, and opening the contacts between the C and
NC terminals.
Refer to the NCU Instructions (UM1M830BNA) for programming
information.
Relay Ratings: Refer to the following.
a.
1A Steady State @ 30 VDC.
b.
3A Peak @ 30 VDC.
The relays are preprogrammed for specific functions. Refer to the
configuration drawing (C-drawing) supplied with your system for
your system’s specific configuration.
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
for pin-out information.
NOTE: -48V is factory wired to the Digital Input #8 (-)
terminal for your convenience and function predefined
for ESTOP. Customer-furnished system ground applied
to terminal Digital Input #8 (+) activates the ESTOP
function. The ESTOP function shuts down and locks out
the rectifiers, opens the battery disconnect contactor,
and shuts down the -48 VDC to +24 VDC converters.
When the ESTOP signal is removed, the battery
disconnect contactor closes (if battery present) and -48
VDC to +24 VDC converters restart. To restart the
rectifiers; turn input power to the rectifiers OFF, wait 30
seconds or more (until the LEDs on the rectifiers
extinguish), then turn input power to the rectifiers ON.
The digital inputs can be programmed to provide an alarm when
the signal is applied (HIGH) or removed (LOW). Refer to the NCU
Instructions (UM1M830BNA) for programming information.
Digital Input Ratings: Refer to the following.
a.
Maximum Voltage Rating: 60 VDC.
b.
Active High: > 19 VDC.
c.
Active Low: < 1 VDC.
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.
Temperature Probes
Two temperature probes can be connected to the IB2 (Controller
Interface Board) mounted inside the distribution cabinet. Refer to
“Temperature Probes” on page 23.
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