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Installation Manual - IRIDIUM I/O Module

This manual guides the designer or installer through the physical installation and the electrical connections of the IRIDIUM I/O module.

Power Supply​

Figure of the IRIDIUM power supply terminals (12 VDC input)

The I/O module must be powered with 12 VDC ±5%. Consumption is 120 mA (base, without peripherals) — up to 150 mA catalog rating.

SpecificationValue
Supply voltage12 VDC ±5%
Consumption120 mA (base, without peripherals) — up to 150 mA catalog rating
Important

Use a regulated power supply sized to support the I/O module and all connected peripherals.

Signal Inputs​

Figure of the signal input terminals (INPUT1 to INPUT8)

The I/O module has eight digital inputs (INPUT1 to INPUT8). These inputs are prepared to receive a dry contact, without power.

The contact triggers the input by connecting it to the device's own GND signal. When the input is connected to GND, it means input on (INPUT = 1).

Isolated inputs

Inputs INPUT1 to INPUT4 have isolated circuits with optical couplers and are therefore for preferred use.

Signal Outputs​

Figure of the connection terminals for the four relay outputs (OUTPUT1 to OUTPUT4) and the open-collector outputs

The device's signal outputs consist of four relays (OUTPUT1 to OUTPUT4) that can energize loads of 1A/120VAC or 2A/30VDC.

SpecificationValue
AC load1A / 120VAC
DC load2A / 30VDC
Warning

Observe these limits to ensure the integrity and service life of the relay contacts.

Relay Pinout​

Each relay has three terminals:

TerminalFunction
NCNormally Closed
CCommon
NONormally Open

Open-Collector Outputs​

In addition to the relays, the I/O module provides two open-collector digital outputs — OUTPUT1 OC and OUTPUT2 OC — that work in parallel with relays OUTPUT1 and OUTPUT2, but with a different electrical signal.

The circuits of these outputs consist of transistors with open collectors and will "conduct" to "zero" when the respective output is turned on. They can energize loads up to 100 mA, which must be connected between the +V terminals and the OUTPUT1 OC or OUTPUT2 OC output.

Serial Ports (UARTs)​

Figure of the serial port connectors (UART1, UART2 and UART3)

The I/O module has three serial communication ports. Ports UART1 and UART2 are available for connecting various configurable devices. They operate on the RS232 electrical standard and can supply 5VDC power to the connected device, such as scanners. The maximum current draw is limited to 150 mA on each port.

Serial port UART3 is used only for special applications and its voltage level is TTL 3.3V.

Serial Connector Pinout​

UART1 and UART2 (RS232):

PinSignal
1+5 VDC
2TX
3RX
4GND

UART3 (TTL 3.3V):

PinSignal
1+3.3 VDC
2TX
3RX
4GND

LCD Display​

Figure of the position of the display module (LCD) connector on the board

The I/O module is prepared for the connection of a display module (LCD) with I2C communication. The electrical level of the signals is TTL at 5VDC.

PinSignal
1GND
2+5VDC
3SCL
4SDA

Buttons and Indicators​

Figure showing the location of the RESET and MODE buttons and the STATUS LED on the board

RESET button — forces the I/O module to reboot. Press it quickly to exit configuration mode.

MODE button — puts the I/O module into configuration mode. Press and hold for 5 seconds.

STATUS LED — provides information about the general state of the communication.

Reading the STATUS LED​

When the I/O module is in operation mode, the STATUS LED provides information about the general state of the communication. Every two seconds a series of up to four quick blinks starts:

BlinkMeaning
1I/O module in operation mode
2Network connection (Ethernet/WiFi) OK
3Connection with the system Broker OK
4Communication with the server OK
Diagnostics

When four blinks are counted in each cycle, the situation is normal. This check is very helpful during installation and maintenance for locating communication failures.

Starting the Configuration​

The IRIDIUM I/O module is configured through a browser. To start the configuration, follow the steps below.

1. Activate Configuration Mode​

  1. Press and hold the MODE button for 5 seconds.
  2. The I/O module will automatically boot into Configuration mode.
  3. The STATUS LED will keep blinking rapidly, indicating that the mode is active.
  4. The I/O module activates a WiFi access point (AP mode) and starts accepting client connections.

2. Connect to the I/O Module WiFi Network​

The WiFi network created by the I/O module has a unique and exclusive name (SSID) for each device:

  • Format: iridium + identification code
  • Examples: iridium7512208F, iridium89C0CF6A

3. Access the Configuration Interface​

  1. Connect to the I/O module WiFi network.

  2. Open the browser and go to: http://192.168.4.1

  3. Enter the default credentials:

    • Username: admin
    • Password: iridiumpwd

From here on, refer to the Operation Manual to configure each I/O module screen.

Installation Recommendations​

  1. Location: install the I/O module in a place protected from the weather.
  2. Ventilation: ensure adequate ventilation for heat dissipation.
  3. Grounding: connect the grounding system properly.
  4. Cabling: use shielded cables in environments with interference.
  5. Protection: consider using surge protectors on the power supply.

Next Steps​

After completing the physical installation, refer to the Operation Manual to configure the I/O module.