Kramer NT-52P User manual





NT-52P – Contents i
Contents
1Introduction 1
2Getting Started 2
2.1 Achieving the Best Performance 2
2.2 Safety Instructions 2
2.3 Recycling Kramer Products 3
3Overview 4
4Defining the NT-52P 2-Port Universal I/O PoE Control Gateway 6
5Initial Configuration and Use Overview 9
5.1 Configuring the NT-52P 2-Port Universal I/O PoE Control Gateway 9
5.2 Setting Up an Ethernet Connection on the PC 11
6Connecting the NT-52P 12
6.1 Connecting via Ethernet 14
7Remote Operation via the Web UI 19
7.1 Browsing the Web UI 19
7.2 Setting the Port Types 22
7.3 Displaying Connected Clients 22
7.4 Setting Device Name and Time Functions 23
7.5 Setting Communication Parameters 25
7.6 Setting Serial Port Parameters 25
7.7 Setting GPIO Port Parameters 28
7.8 Setting Relay Port Status 32
7.9 Configuring IR Command Learning 33
7.10 Activating Security 34
7.11 Using the Logs Page 36
7.12 Kramer Information 38
8Using NT-52P Operations 39
8.1 IR Learning 39
8.2 Resetting to the Factory Default Settings 40
8.3 Upgrading the Firmware 40
9Technical Specifications 41
9.1 Data Handling Performance 42
9.2 Example Bandwidth Calculation 42
10 Default Parameters 43
11 Kramer Protocol 3000 44
11.1 Kramer Protocol 3000 – Syntax 45
11.2 Kramer Protocol 3000 – Command List 48
11.3 Kramer Protocol 3000 – Detailed Commands 49

ii NT-52P – Contents
Figures
Figure 1: NT-52P 2-Port Universal I/O PoE Control Gateway 6
Figure 2: Connecting the NT-52P for Initial Configuration 9
Figure 3: Configuring a Remote Connection 11
Figure 4: Connecting the NT-52P 2-Port Universal I/O PoE Control Gateway 12
Figure 5: Local Area Connection Properties Window 15
Figure 6: Internet Protocol Version 4 Properties Window 16
Figure 7: Internet Protocol Version 6 Properties Window 16
Figure 8: Internet Protocol Properties Window 17
Figure 9: General Info Page 20
Figure 10: Ports Type Setting Page 22
Figure 11: Connected Clients Page 23
Figure 12: Device Settings Page 24
Figure 13: Communication Page 25
Figure 14: Serial Port Settings Page – RS-232 Port Type 26
Figure 15: Serial Port Settings Page – RS-485 Port Type 27
Figure 16: GPIO Port Settings Page 28
Figure 17: GPIO Port Settings Page Digital IN 29
Figure 18: GPIO Port Settings Page Digital OUT 30
Figure 19: Digital Out Selection Warning Popup 30
Figure 20: GPIO Port Settings Page Analog IN 31
Figure 21: Relay Port Settings Page 32
Figure 22: IR Command Learner Page 33
Figure 23: Security Page 34
Figure 24: Security Confirmation Popup 35
Figure 25: Authentication Required Popup 35
Figure 26: Security Activated Page 36
Figure 27: Logs Page 37
Figure 28: About Us Page 38

NT-52P – Introduction 1
1 Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been
providing a world of unique, creative, and affordable solutions to the vast range of
problems that confront video, audio, presentation, and broadcasting professionals
on a daily basis. In recent years, we have redesigned and upgraded most of our
line, making the best even better!
Our 1,000-plus different models now appear in 14 groups that are clearly defined by
function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers;
GROUP 3: Control Systems; GROUP 4: Format/Standards Converters; GROUP 5:
Range Extenders and Repeaters; GROUP 6: Specialty AV Products; GROUP 7:
Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9:
Room Connectivity; GROUP 10: Accessories and Rack Adapters; GROUP 11:
Sierra Video Products; GROUP 12: Digital Signage; GROUP 13: Audio; and
GROUP 14: Collaboration.
Congratulations on purchasing your Kramer NT-52P 2-Port Universal I/O PoE
Control Gateway that is ideal for use in the following applications:
•Remote IP control of any controlled devices
•Fast field replacement of any I/O control gateway
•Remote upgrade of any control I/O interface
•Control system with multiple IP clients
•LAN-based I/O-ports expansion of control systems

2 NT-52P - Getting Started
2 Getting Started
We recommend that you:
•Unpack the equipment carefully and save the original box and packaging
materials for possible future shipment
•Review the contents of this user manual
Go to www.kramerav.com/downloads/NT-52P to check for up-to-date user
manuals, application programs, and to check if firmware upgrades are
available (where appropriate).
2.1 Achieving the Best Performance
To achieve the best performance:
•For optimum range and performance, use the recommended Kramer cables
available at www.kramerav.com/product/NT-52P
•Do not secure the cables in tight bundles or roll the slack into tight coils
•Avoid interference from neighbouring electrical appliances that may adversely
influence signal quality
•Position your NT-52P away from moisture, excessive sunlight and dust
This equipment is to be used only inside a building. It may only be
connected to other equipment that is installed inside a building.
2.2 Safety Instructions
Caution:
There are no operator serviceable parts inside the unit
Warning: Use only the Kramer Electronics power supply that is
provided with the unit
Warning: Disconnect the power and unplug the unit from the wall
before installing

NT-52P – Getting Started 3
2.3 Recycling Kramer Products
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC aims
to reduce the amount of WEEE sent for disposal to landfill or incineration by
requiring it to be collected and recycled. To comply with the WEEE Directive,
Kramer Electronics has made arrangements with the European Advanced
Recycling Network (EARN) and will cover any costs of treatment, recycling and
recovery of waste Kramer Electronics branded equipment on arrival at the EARN
facility. For details of Kramer’s recycling arrangements in your particular country go
to our recycling pages at www.kramerav.com/support/recycling/.

4 NT-52P - Overview
3 Overview
The NT-52P is a compact universal−I/O PoE control gateway, capable of plug and
play deployment over an existing LAN for remote control of customer−controlled
devices via two universal I/O ports. The ports can be configured as bidirectional
RS−232, crossed RS−232, RS−485, IR, GPI/O or relay control connections.
Multiple control clients can be connected over IP to the NT-52P control gateway for
concurrent control of devices, such as AV scalers, video projectors and displays,
audio amplifiers, DVD players, sensors, screens, shades, door locks, and lighting.
The NT-52P features:
•Innovative Universal I/O Ports – Remote IP-based control of any device
connected to the control gateway universal I/O ports, with selectable port
configuration to bidirectional RS−232, RS−232 cross, RS−485, IR, GPI/O or
relay control. Each port is adaptable for any room device control simply by
toggling a button.
•Multiple IP Connected Clients – Remotely connected over an existing
Ethernet network, concurrently controlling any devices connected to control
gateway universal I/O ports.
•Easy & Reliable Installation:
•Plug-and-Play IP Installation with dynamic (DHCP) address resolution
and auto device discovery over existing LAN.
•Compact, designed for piggy−back installation, such as behind a TV or
display, with the ability to draw power over Ethernet.
•Remote Management:
•Single PoE cable for both, powering and connectivity, and Plug and
Play IP installation with dynamic (DHCP) address resolution and auto
device discovery over existing LAN.
•Highly−resilient powering with multiple power options — Power over
Ethernet per IEEE 802.3af standard, and/or PSU (included).

NT-52P – Overview 5
•Built−in web UI for remote browser−based management and support,
by multiple IP−clients over existing LAN.
•Easy firmware upgrades, either remotely via existing LAN, or locally via
USB device port.
•Size – DigiTOOLS™ – Mount 3 units side-by-side in a 1U rack space with the
optional RK−3T rack adapter.

6 NT-52P - Defining the NT-52P 2-Port Universal I/O PoE Control Gateway
4 Defining the NT-52P 2-Port Universal I/O
PoE Control Gateway
This section defines the NT-52P.
Figure 1: NT-52P 2-Port Universal I/O PoE Control Gateway
#
Feature
Function
1
IR Sensor
Sensor for IR learning
2
IR LED
Lights blue to indicate IR learning activity
3
LINK LED
Lights blue to indicate Ethernet link activity
4
Port 1 Blue LED
Port 1 activity left indication. For functionality, see Table 1
5
Port 1 White LED
Port 1 activity right indication. For functionality, see
Table 1
6 Port 1 MODE Button Press to cycle through and select Port 1 mode function.
See Table 1 for selected mode button color. Wait ~5sec
until ‘Save?’ is displayed on LCD display, and press again
within ~5sec to save the selected mode, otherwise
‘Unsaved’ is displayed. A long press >5sec locks the
saved mode or unlocks the locked mode.
7 Port 1 MODE LCD
Display
Displays selected Port 1 mode function: RS-232, RS-232
Cross, RS-485, Relay, IR, GPIO. See Table 1 for the
mode of displayed text. When pressing a locked button,
‘Locked’ is displayed.
8
Port 2 Blue LED
Port 2 activity left indication. For functionality, see Table 1
9 Port 2 White LED Port 2 activity right indication. For functionality, see
Table 1
10 Port 2 MODE Button Press to cycle through and select Port 2 mode function.
See Table 1 for selected mode button color. Wait ~5sec
until ‘Save?’ is displayed on LCD display, and press again
within ~5sec to save the selected mode, otherwise
‘Unsaved’ is displayed. A long press >5sec locks the
saved mode or unlocks the locked mode.
11 Port 2 MODE LCD
Display
Displays selected Port 2 mode function: RS-232, RS-232
Cross, RS-485, Relay, IR, GPIO. See Table 1 for the
mode of displayed text. When pressing a locked button,
‘Locked’ is displayed.
12
ON LED
Lights green when unit power is on

NT-52P – Defining the NT-52P 2-Port Universal I/O PoE Control Gateway 7
#
Feature
Function
13 Port 1 I/O 3-pin Terminal
Block
Port 1 terminal block
14 Port 2 I/O 3-pin Terminal
Block
Port 2 terminal block
15
ID
Press to broadcast ID message for auto-discovery of
the device
16
SERVICE Micro USB
Connector
Connects to a PC for a local firmware upgrade
17
RESET Button
Press and hold while cycling the device power to reset
to factory default parameters
18
LAN/POE RJ-45
Connector
Connects to a PoE source (Power over Ethernet) for
powering and an IP client or other controller, either
directly or via a LAN
19 12V DC Connector
Connects to the 12V DC power supply, center pin
positive. Not needed when the device is supplied power
by a PoE power source

8 NT-52P - Defining the NT-52P 2-Port Universal I/O PoE Control Gateway
Port I/O
Function
8-Char
Display
Text
Terminal Block Connections IO Port
Default
TCP
Default
Port
[P1/P2]
Mode
Button
LED
color
Blue
Activity LED
[left]
White
Activity LED
[right]
G P1 P2
RS-232 RS-232 Ground Rx Tx 9600,8,N,1 5001/2 Yellow Flashes when
receiving data
Flashes when
transmitting
data
Crossed
RS-232 RS-232X Ground Tx Rx 9600,8,N,1 5001/2 Green Flashes when
receiving data
Flashes when
transmitting
data
RS-485 RS-485 Ground Rx (+) Tx (-) 9600,8,N,1 5001/2 Pink Flashes when
receiving data
Flashes when
transmitting
data
IR IR+IR Ground IR1IR25000 Red
ON when
transmitting
IR1 data
ON when
transmitting
IR2 data
IO IO+IO Ground IO1IO2Digital In
x 2 5000 Blue ON when IO1
is active
ON when IO2
is active
Relay Relay Common Normally
Open
Normally
Closed
Normally
Open 5000 White N/A
ON when
Relay
is active
Table 1: NP-52P Function Table
Legend:
Tx – Transmit, Rx – Receive
9600, 8, N, 1 – 9600 baud, 8-bits, no parity, 1 stop bit
P1 / P2 – Port 1 / Port 2
IR1 / IR2– IR Port 1 / IR Port 2
IO1 / IO2– IO Port 1 / IO Port 2

NT-52P – Initial Configuration and Use Overview 9
5 Initial Configuration and Use Overview
This chapter provides an overview of the initial configuration and basic operation of
the NT-52P and comprises:
•Configuring the NT-52P (see Section 5.1)
•Configuring an Ethernet connection on the PC (see Section 5.2)
Figure 2: Connecting the NT-52P for Initial Configuration
5.1 Configuring the NT-52P 2-Port Universal I/O PoE Control
Gateway
The NT-52P
is shipped from the factory with DHCP enabled (off by default)
and a random IP address. To connect the NT-52P on first installation, you
must identify the IP address that was automatically assigned to the
NT-52P. To discover the IP address of NT-52P, use K-LAN Configurator,
available for download from our website at www.kramerav.com..
To browse the NT-52P Web UI on taking the device out of the box:
Use the default host name: NT-52P-xxxx, where xxxx are the last four digits of the
serial number of the device.

10 NT-52P - Initial Configuration and Use Overview
To configure the NT-52P:
1. Connect the Ethernet port on the rear panel of the NT-52P to a PC, either
directly or via a LAN, (see Section 6.1).
2. Using a Web browser and the relevant IP address or host name (see
Section 9.1), browse the General Info home page (see Figure 9).
3. Click Device Settings to browse to the Device Settings page, (see
Figure 12).
4. Enter the time and date manually, or enter the Time server address for
automatic time and date synchronization.
5. Click Save Changes.
6. Click Communication to browse to the Communication page, (see
Figure 13).
7. Enter the IP address, mask and gateway for static IP addressing and click
Set. We recommend that you set a meaningful host name.
If you have changed the IP address from the default setting, you must
reload the General Info home page again using the new IP address.
8. Click GPIO Port Settings to browse to the GPIO Port Settings page, (see
Section 7.6). Here you can configure digital in, digital out and analog in port
parameters.
9. Set the trigger type, voltage levels and status of each port.
10. Click Save Changes.
11. Click Relay Port Settings to browse to the Relay Port Settings page, (see
Section 7.8). Here you can set the relays on or off.
12. If required, click Security (see Section 7.9) to browse to the Security page.
13. Click ON to activate security.
The user name and password credentials popup appears.

NT-52P – Initial Configuration and Use Overview 11
14. Enter the required user name and password. (The default user name is
Admin and the password is Admin).
5.2 Setting Up an Ethernet Connection on the PC
If the control application can directly connect to the Ethernet driver, select the host
IP and port number according to your NT-52P configuration, as illustrated in
Figure 3.
Figure 3: Configuring a Remote Connection

12 NT-52P - Connecting the NT-52P
6 Connecting the NT-52P
Always switch off the power to each device before connecting it to your
NT-52P. After connecting your NT-52P, connect its power and then
switch on the power to each device.
Figure 4: Connecting the NT-52P 2-Port Universal I/O PoE Control Gateway
To connect the NT-52P as illustrated in the example in Figure 4:
1. Connect the device to a LAN or PC via the RJ-45 Ethernet connector.
2. Following the Save Settings Procedure, set and save RS-232 to Mode 1.
3. According to the connections shown in Table 2, connect an RS-232-
controlled device, (for example, a projector) to terminal block 1.
4. Following the Save Settings Procedure, set and save Relay to Mode 2.
5. According to the connections shown in Table 2, connect a relay-controlled
device, (for example, a projection screen) to terminal block 2, Common pin
and either Normally Open or Normally Closed pin per needed operation
mode.

NT-52P – Connecting the NT-52P 13
6. If the NT-52P does not receive power from a PoE provider, connect the
device to the power supply and connect the power adapter to the mains
electricity (as shown in Figure 4).
Changing the port mode resets the ports to their default state: GPIO
goes to its low state and the relay goes to its open state.
Save Settings Procedure:
•Press to cycle through and select a Port 1 or 2 mode function.
See Table 1 for selected mode button color.
•Wait approximately 5 seconds until ‘Save?’ appears on LCD display
•Press again within about 5 seconds to save the selected mode, otherwise
‘Unsaved’ displays.
•A long press of over 5 seconds locks the saved mode – ‘Locked’ appears on
the LCD display – or unlocks the locked mode – ‘Unlocked’ appears on the
LCD display.
•
8-Char
Display
Text
Terminal Block Connections
G P1 P2
RS-232 RS-232 Ground Rx Tx
Crossed
RS-232 RS-232X Ground Tx Rx
RS-485 RS-485 Ground Rx (+) Tx (-)
IR IR+IR Ground IR1IR2
IO IO+IO Ground IO1IO2
Relay Relay Common Normally Open Normally Closed
Table 2: NP-52P Terminal Block Connections
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