AMX Metreau Entry Communicator with Display MET-ECOM-D - Manual (Page 17)

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
Do not use the relays on this unit for "secure" applications such as door and gate
releases. For security reasons, an external relay box put in a secure location will work
better for these devices.