User Accessible Interfaces; Human Machine Interface; Inhibit Input (Control Relay 3, Cr3) - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

5.3

User Accessible Interfaces

The drive system follows an interface design concept of providing you with a singular terminal
strip for access to required drive interface signals. This terminal strip may be divided into sections
by voltage and use classification. The terminal strip is designated by the name TB2. Its
subsections will have the prefix of TB2 and may have a suffix associated with their classification.
All of the following user accessible interface signals will be brought to the TB2 terminal strip(s)
for customer use. Reference the system wiring diagrams of your drive for the actual connection
points.
5.3.1

Human Machine Interface

The standard interface for the drive is the keypad which is detailed in the Sofware User Interface
section of this manual. The standard interface is used to control the drive, change parameters,
and tune and monitor performance.
Note
Optional touch screen HMI offers running either the PC-based tool or application
proprietary software.
This feature will be released in a later version software.
In addition, a PC based tool can optionally be connected for remote control, configuration and
monitoring via an Ethernet connection. The drive tool includes all of the functionality of the
keypad plus it provides graphing capability for a number of internal control signals. The drive
tool is part of a collection of tools known collectively as the ToolSuite. As part of the diagnostic
capabilities of the NXGPro+ control, diagnostic information is available through connection to
the Ethernet port on the DCR. Refer to the NXGPro+ToolSuite Software Manual (A5E3086439)
for further information.
5.3.2

Inhibit Input (Control Relay 3, CR3)

The inhibit input, previously known as the control relay 3 (CR3) input, is used to directly control
the output of the drive by removing the drive enable bit in the modulator and disabling all fiber
optic transmission channels. This removes the ability for the cells to be commanded to switch.
This is a hardware to logic connection, no software is involved from this input. There is an SOP
function that is similar but involves software. It is important to note that this only removes the
ability for the cells to switch, not the medium voltage potential of the drive, nor the inertial
energy of the motor and driven application.
The inhibit input is located on the signal interface board. The input is optically isolated and can
be either 24 VDC or 120 VAC depending on which set of input connections are used. Both
connections cannot be used at the same time. Typically, internal I/O power is used to drive the
circuit. The circuit is arranged in a series failsafe configuration. Door switch devices may be part
of the circuit within the drive. Dry contacts are recommended but not required unless the circuit
run is excessively long. The voltage connection used is based on the specific drive
configuration. The user connection is TB2. Consult the drive specific wiring diagrams for exact
pin connections.
NXGPro+ Control Manual
Operating Manual, A5E50491925A
Hardware User Interface Description
5.3 User Accessible Interfaces
69