Model 2410 is a compact open-frame module that interfaces 48 general-purpose TTL/CMOS digital input/output (DIO) signals to Ethernet. It features edge detection, PWM output mode and other functions that offload work from the host computer in measurement and control applications.
I disabled the 2410 communication watchdog timer but the connection still times out after 5 minutes. Why is this happening?
The 2410's communication watchdog is disabled by sending a
wto 0 command. However, most telnet clients also have their own inactivity timer, which is set to a default interval (typically 5 minutes). Consequently, the telnet client will independently close the connection when the session is idle for longer than its own timer interval. To resolve this, you must reconfigure your telnet client to use a different interval.
The 2410 seems to be retransmitting every TCP packet. Why is this happening?
By default, the 2410 echoes all incoming data. To turn off the remote echo function, have your telnet client issue an
IAC DONT ECHO command to the 2410.
Command line functions
Where can I find information about the 2410's telnet commands?
For detailed information about telnet commands, please see Sensoray Model 2410 Command Line Protocol.
If you are manually controlling a 2410 via telnet and you just need a quick list of available commands, type 'help' at the shell prompt and hit return. When you do this you will see something like the following:
For more specific information about a particular command, type 'help <command>' and hit enter. For example, for information about the wdo (write digital outputs) command, type 'help wdo'.
How to connect loads
Using a 2410TA
Model 2410TA is a compact breakout board that plugs directly onto a 2410 module. It has two spring-activated terminals per DIO which accept 16- to 24-gauge wires. For each DIO, the silkscreen legend indicates the DIO number and its "+" and "-" terminals. The "+" terminal conveys +5 VDC and the "-" terminal conveys the active-low DIO signal.
To connect a model 2410TA to a load:
- Route the "+" terminal to the load's positive input and route the "-" terminal to the load's negative input.
- The load's positive and negative inputs should only connect to the 2410TA "+" and "-" terminals; they must not connect to any other circuit nets in your system.
- The load must not draw more than 24 mA (load input resistance must be > 208 Ω).
Without a 2410TA
All DIO signals are conveyed through 7410 header J2. A DIO signal is active-low and should therefore be connected to the negative input of its load. For example, when controlling a solid-state relay (SSR), connect the DIO signal to the SSR "-" control input.
Every load also requires a connection to +5 V, which is not available on J2. Consequently, two other connectors are provided on the 2410 module for this purpose: +5 V is available on J4 pin 1 and J5 pins 1-8. In the case of a solid-state relay, connect +5 V to the "+" control input of the SSR.
In some cases the external circuitry may also need a signal ground, which is available on all even-numbered pins of J2. Note that these should only be used as signal references and should never be connected to external ground nets, as this would result in disruptive, and possibly destructive, ground loop currents.