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Wiring and Connections

11

Metreau Entry Communicators 

Input/Output (I/O) Port: Connections and Wiring

The I/O port responds to either switch closures, voltage level (high/low) changes, or it can be used for 
logic-level outputs. 

A contact closure between the GND and an I/O port is detected as a Push. 

 

When used for voltage inputs, the I/O port detects a low signal (0 - 1.5 VDC) as a Push, and a 

high signal (3.5 - 5 VDC) as a Release (this IO port uses 5V logic but can handle up to 12V 
without harm).

 

When used for outputs, the I/O port acts as a switch to GND and is rated for 200 mA @ 5 
VDC. This device can use up to 2 I/O ports (see table below).

 

The PWR pin provides +5 VDC @ 200 mA.

 

The GND connector is a common ground and is shared by all I/O ports (see table below).  

Connecting The Device via I/O

When connecting the I/O port, the GND on the Metreau Entry Communicator must be connected to the 
ground of the I/O device, e.g., a master or any third party I/O device.

Relay Port: Connections and Wiring

You can connect up to 2 independent external relay devices to the Relay connectors on the Metreau Entry 
Communicators. 

 

Connectors labeled A are for common; B are for output.

 

Each relay is isolated and normally open. 

I/O Port Wiring Specifications

Pin

Signal

Function

1

5  VDC

PWR

2

I/O 2

Input/Output

3

I/O 1

Input/Output

4

GND

Signal GND