Neets Switching Relay - 4

4-Relay with built-in PSU and LAN


Neets Switching Relay – 4 gives you 4 relays, so it is possible to control multiple devices, 4 I/Os and dedicated relay test buttons for each relay.

Neets Switching Relay - 4 adds 2 additional RS-232 ports to your control system, is easily setup, and controlled through LAN or RS-232.

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  • 4 Built-in relays
    Control for multiple devices, including screens and room lighting/darkening
  • 4 I/O ports
    Flexible control for AV and auxiliary devices
  • Screen mode
    Two relays can be connected as a pair for “screen mode”
  • LAN to RS-232 breakout
    Adds two additional RS-232 ports to the control system
  • Relay test buttons
    Each relay has its own test button with LED status indication
  • Configuration through RS-232 or LAN
    Fully integrated into Neets Project Designer and compatible with 3rd party systems
  • RS-232 Loop-through
    Control two devices via RS-232 from a control system with only one RS-232 port
Power supply:
100-240 VAC

Relay load max AC1:
1150 Watt

Relay load max
AC15 (230VAC):
500 Watt

Relay single-phase
Motor rating (230 VAC): 370 Watt
Motor rating ¼ HP @ 125 VAC

Relay max voltage:
230 VAC

Power supply fuse:
0.5 A / 230 VAC

Control inputs:
Active when connected to ground

RS-232 Remote Control:
Baud rate: 19200
Data bits: 1
Stop bits: 1
Parity: None

Network (LAN):
Speed: 10/100 Mbit
Duplex: Half and full

Width: 265 mm
Height: 215 mm
Depth: 100 mm

Width: 10,43 inches
Height: 8,46 inches
Depth: 3,93 inches

1 kg/ 35 oz

Approval: CE
EN 61000-6-2:2005
EN 61001-6-3:2005

Product item numbers:
Neets Switching Relay - 4


Neets Project Designer
Neets Project Designer
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-Ver. 3.12.0 (16-10-2017)
New Features:
  • KNX devices license support in control systems.
  • Calendar functions and support for NEB expansion unit's RTC.
Bug Fixes:
  • QueBec Pro I/Os are now in input state by default.
+Ver. 3.11.3 (14-09-2017)
+Ver. 3.11.2 (27-06-2017)
+Ver. 3.11.1 (09-06-2017)
+Ver. 3.11.0 (28-04-2017)
+Ver. 3.10.0 (05-12-2016)
+Ver. 3.9.0 (31-10-2016)
+Ver. 3.8.5 (02-09-2016)
+Ver. 3.8.4 (17-06-2016)
+Ver. 3.8.3 (03-06-2016)
+Ver. 3.8.2 (01-06-2016)
+Ver. 3.8.1 (10-05-2016)
+Ver. 3.8.0 (27-04-2016)
+Ver. 3.7.0 (11-01-2016)
+Ver. 3.6.7 (06-11-2015)
+Ver. 3.6.6 (02-11-2015)
+Ver. 3.6.5 (28-10-2015)
+Ver. 3.6.4 (13-10-2015)
+Ver. 3.6.3 (13-08-2015)
+Ver. 3.6.2 (03-07-2015)
+Ver. 3.6.1 (29-06-2015)
+Ver. 3.6.0 (21-05-2015)
+Ver. 3.5.2 (20-04-2015)
  • Q: Does the Neets Switching Relay - 4 protect the screen from the possibility of getting mains on both sides of the engine at the same time? (Mutual blocking)
    A: Yes, this feature is built into the hardware, if you use the dedicated screen connections.
  • Q: How do I easily adjust the end stops for the screen?
    A: You can use the test buttons to manoeuvre the screen up and down to ease the adjustment.
  • Q: Why are there odd cut-outs in the printed circuit board?
    A: They are used for cable ties to relieve the cables.
  • Q: How do I control the Neets Switching Relay - 4?
    A: The Neets Switching Relay - 4 can be controlled via RS-232, LAN or I/O ports.
  • Q: How do I update the firmware of Switching Relay - 4, if the firmware is newer than 3.6.3?
    A: Open Project Designer and press update to ensure you have the latest firmware downloaded, then connect the Switching Relay - 4 to a computer via USB, and then a box appears if there is a newer firmware than the one in the device.
  • Q: How do I update the firmware if the firmware is 3.6.2 or older? (Only relevant for products bought before August 2015)
    A: Connect the Switching Relay - 8 to a computer via USB, and the box should show as a drive in file explorer.

    Now swap the file on the drive with the newest firmware from our website. In the future, the relay will update automatically when connecting to Neets Project Designer. Be sure you have updated the Project Designer software before starting the process!
    Note: This can only be done form a computer running Windows 7!
  • Q: What is the default Baudrate of a 4-Relay?
    Baudrate: 19200
    Data bit: 8
    Stop bit: 1
    Parity: None
  • Q: What is the default LAN settings of an 4-Relay?
    IP address:
    Subnet address:
    Default Gateway:
    DHCP: off
    LAN speed: 100 Full duplex
    TCP port: 5000
  • Q: How do I set the Neets Switching Relay - 4 IP address?
    A: This is done with the RS-232 on port 1 by sending the following command:
    where the UNIT ID of your relay is 1, and is the IP address you want to set.
    Remember to send a save command to save your settings for when the power is off.
    The save command is: NEUNIT=1,SAVE=TRUE
    See the protocol list in the manual for further network settings you can alter.
    means Carriage Return Hex=0D
  • Q: How does RS-232 loop-through work?
    A: Connect your control panel to the RS-232 port 1 and any sequence sent to this port with an id number different from itself will be retransmitted on port 2.
  • Q: What is the internal power supply for?
    A: You can use the PSU to power your Neets Control System, which will then make the PSU that comes with the control system obsolete.
  • Q: How can I tell if the Switching Relay 4 is the new improved version?
    A: Locate the serial number, new range are starting at 1732XXXXX and upwards.

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