NetSure
™
Control Unit (NCU)
User Manual, UM1M830BNA
Spec. No: 1M830BNA, 1M830DNA Code: UM1M830BNA
Model No: M830B, M830D Revision M, May 12, 2017
NCU Digital Input and Relay Output Connections
NCU Digital Input Connections
The NCU provides four (4) digital inputs for alarms/events. Screw-pressure type connections are provided. Wire size range is 28 AWG to
16 AWG. Recommended torque for these connections is 0.19 N-m (1.7 in-lbs.). Refer to Figure 114 for connector location and pin-outs.
Note that some digital inputs may be factory wired to the system.
NCU Relay Output Connections
The NCU provides four (4) sets of Form-C alarm relay dry contact outputs for connection of remote alarms. Relay contacts are rated for
60 W: 2 A @ 30 VDC or 1 A @ 60 VDC. Screw-pressure type connections are provided. Wire size range is 28 AWG to16 AWG.
Recommended torque for these connections is 0.19 N-m (1.7 in-lbs.). Refer to Figure 114 for connector location and pin-outs.
Each relay is user configurable for alarm conditions. Alarm relay contacts can be connected to other monitoring equipment.
Note that some relay outputs may be factory wired to the system.
IB2 (Controller Interface Board) and EIB (Controller Extended Interface Board)
An IB2 (Controller Interface Board) and/or EIB (Controller Extended Interface Board) may be connected to the NCU. The IB2 and EIB
provide additional digital inputs and relay outputs. Note that some digital inputs and/or relay outputs may be factory wired to the
system. Refer to your Power System documentation for IB2 and EIB connections and specifications.
Figure 114. NCU Digital Input and Relay Output Connections
NO NCCNO NCC NO NCCNO NCC
Relay
Outputs
Relay
Outputs
Digital
Inputs
Digital
Inputs
DO 4DO 3DO 2DO 1 DI 4DI 3DI 2DI 1
+ - + - + - + -
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