User manual

eElectro Industries/GaugeTech Doc # E113-7-03-1.18 2-2
• Relay Option: Once powered up, the relay will stay energized unless there is a problem. One
of the following conditions will de-energize the relay:
1. Checksum Mismatch on the unit’s run time code.
2. Internal Modem is not functioning properly.
3. Loss of power in the unit.
• Power On and Off Switch: With this switch, you can shut down without unplugging the unit.
• Second Phone Jack for Phone Use: A telephone can be connected to this jack which may be
used immediately, if there is an emergency at the site. Picking up this line will disconnect the
unit and the second phone line will have a dial tone in 10-15 seconds.
• Optional Upgraded Internal Modem Unit: The Internal Modem is now available in 33.6k or
the upgraded 56k option.
- Self Protection (Included from Version 3.4): The SM1-16 is always a slave to the
Master/Modem Port. At the same time, SM1-16 is always a Master to its 16 slave ports.
In the previous version, SM1-16 always listened to the slave ports. Starting with this version,
SM1-16 will only listen to the slave ports in Throughput Mode. That means that the data
coming into the slave ports will be ignored if SM1-16 is in Command Mode or in Start-up
Mode. (Start-up Mode refers to the short period of time after Power-up or reset.)
Additionally, when the connection at the Master/Modem port is lost, SM1-16 will reset itself
right away.
- Programmable Escape Sequences (Included from Version 3.5): There are 5 different escape
sequences available. They are %%%, $$$, ###, @@@, !!!. This makes it possible to have
daisy-chained SM1-16 units in the field.