---
title: "Universal port"
canonical: "https://docs.cuesystem.com/space/PRODUCTS/292159618/Universal%20port"
format: markdown
---
**Connector pinout**

|  |  |  |
| --- | --- | --- |
| 2-pin 3.5 mm | Pin | Description |
| ![image](media://70276af1-f177-478b-92d7-141aa4ba41b6) | S | Universal signal |
| G | Ground |

The Universal port can be used as:

> Macro (toc)

## Digital Input

For digital input usage, the output has to be in an open state and the pull-up current source can be used.

**Parameters **of digital input are as follows:

- Input protected to +30 VDC / -12 VDC
- Digital levels 0: < 0.6 V, 1: > 2.5 V
- Input impedance >100 kOhm

## Digital Output

The digital output provides on/off closure signals for driving a relay and triggers inputs from a variety of devices. For digital output, the **open collector switch** is used and the pull-up resistor can be switched on. 

**Parameters **of digital output are as follows:

- Open collector
- Max. sink current 200 mA / max. 30 VDC
- Catch diodes for use with real load
- Current-source pull-up 9 mA (max. 10 V)
- Current-source pull-up -9 mA (max. -10 V)

**Examples of use:**

| **Connection** | **Description** |
| --- | --- |
| ![image](media://dda4737a-187d-4c0d-a3d9-9322734e4106) | Driving relays with the low-voltage coil. |
| ![image](media://6d5933c6-1d7a-4816-a7ed-a8ebc1166d89) | Driving LEDs for custom indicators on keyboards, control panels, etc. |
| ![image](media://8f756b77-ba8a-486f-9124-377f4c640c24) | Driving LED strips with max. voltage 30 VDC and max. current 200 mA. |

## IR Output

This mode provides output for infra-red emitters IR Adapter /i.

**Parameters **of IR output are as follows:

- Maximum IR carrier frequency 500 kHz
- Up to three original infra-red emitters IR Adapter can be connected to each output in parallel. All emitters send the same IR codes. This configuration can be used for different types of devices.

> ⚠️ It is not recommended to connect more infra-red emitters of various manufacturers in parallel because the output can be either overloaded or damaged.

**Connecting**

![image](media://4dc48108-790e-4140-85bf-202ccf6fb01c)

## Serial Output

This mode provides a one-way RS-232 output channel. 

**Parameters **of serial output are as follows:

- Maximum serial data rate 115 200 Bd (bps)
- Output signal level range -12 V to +12 V.

> ⚠️ In case there are more ports in the unit, all pins labeled G are connected.

**Connecting**

![image](media://dda8c155-43a8-4a28-b403-e30673ecb24a)