Introduction

Digital I/O (Input/Output) is a hardware feature that allows gateways to directly interface with physical industrial equipment. This feature bridges the gap between digital networks and physical industrial processes. In industrial environments, this capability is particularly valuable as it allows for monitoring and control of legacy equipment that lacks native network connectivity, enabling industrial IoT applications while maintaining compatibility with existing infrastructure.

Software Configurable Digital I/O

The digital I/O state information and configuration can be accessed from Settings -> Digital I/O menu. For signal physical properties, refer to I/O section of the specific gateway data sheet.

Input port roles

Not selected – no action based on port state
Allow Internet connection – when port voltage is set high, Node allows Internet connections. When port voltage is set low, there is no Internet access and the Node visibility is “offline” for all Keys matched with it.
Prevent Internet connection – when port is set high, Node prevents Internet connection and the Node visibility is “offline” for all Keys matched with it. When port voltage is low, Internet access is allowed.
Allow VPN connections – when port voltage is set high, Node allows incoming VPN connections from matched Keys. When port voltage is low, VPN connections are not allowed and the Node visibility is “offline” for all Keys matched with it.
Prevent VPN connections – when port is set high, VPN connections are not allowed and the Node visibility is “offline” for all Keys matched with it. When port voltage is low, Node allows incoming VPN connections from matched Keys.

Output port roles

Not selected – no action based on port state
Internet connection OK – when Node detects Internet connection to be OK, the port voltage is set high. If the Internet connection is not OK, the port voltage is set low.
Internet connection failed - when Node detects there is no Internet connection, the port voltage is set high. If the Internet connection is OK, the port voltage is set low.
VPN connection active – when Node detects active VPN connection(s) from matched Keys, the port voltage is set high. When there are no active VPN connections, the port voltage is set low.
VPN connection inactive – When there are no active VPN connections the port voltage is set high. When Node detects active VPN connection(s) from matched Keys, the port voltage is set low.

Digital I/O SMS Alert

In order for the SMS alert feature to work, make sure to use a SIM card that supports sending SMS messages. SMS alert feature can be activated on digital I/O settings by selecting “Send SMS” for “Input port 1 role” and/or “Input port 2 role”. After this, more settings for the SMS alert feature will become visible.

The following settings need to be defined for input port 1 or input port 2 or both:

Input port <X> SMS action - Select the trigger (high / low) for SMS sending: “Send message when input ≤X≥ is high” or ”Send message when input ≤X≥ is low”
Input port <X> SMS message - Define the message to be sent. Concatenated SMS is not supported so the maximum length of a message is 160 characters (western alphabet). If using non-western alphabet, the limit is 70 characters.
Input port <X> SMS phone numbers - Enter phone number(s) to send the message to. Only one number per input field is allowed. More phone numbers can be added by adding a new input field.
Input port <X> SMS send limit - Determines how many messages per minute will be sent. “0” stands for no limit. Use this feature when the I/O may switch high-low several times and you do not want to send SMS for each state change. Any message sent will be sent to all numbers defined in “Input port ≤X≥ SMS phone numbers”
Input port <X> SMS target modem - Currently only internal modem is supported. In case there are two SIMs inserted, the SMS will be sent from the active SIM at the time of the alarm.
In devices with two I/O ports both have SMS settings independent of each other.

Sending an SMS will happen in 1-10 seconds of the trigger. In case the SIM subscription does not support sending SMS, the messages will not be sent. Once the SMS has been sent, the time to get it delivered to the destination is dependent on the Operator used.

Some subscriptions need the Message Service Center number defined to be able to send SMS messages. This can be set in “Internal Modem “ settings where ”SMS center number” can be defined. The number should be defined in international format (e.g. “+358…”)

Note that the setting can be defined separately for both SIM slots.

Tosibox 350 and 375

Digital Input

By default the state for Input port 1 and 2 are HIGH
Dry contact (no external voltage)
- Connecting DI0 to GND switches Input port 1 state to LOW (dry contact)
- Connecting DI1 to GND switches Input port 2 state to LOW (dry contact)
Wet contact (with external voltage)
- Providing <1.5V to DI0/GND (or DI1/GND) switches Input port 1 (or 2) state to LOW (wet contact)
- Providing >1.5V to DI0/GND (or DI1/GND) switches Input port 1 (or 2) state to HIGH (wet contact)
Max 0-30V

Relay Output

By default the state for Output relay port 1 and 2 are OPEN
When Output relay port state is OPEN K0+/K0- circuit is open and any load on the circuit is not powered
When Output relay port state is CLOSED K0+/K0- circuit is closed and any load on the circuit is powered with whatever powering is provided on the circuit (5-30V/5A)
Max 30VDC/250VAC, 5A