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Last modified by Mengting Qiu on 2025/06/04 18:42
From version 162.1
edited by Dilisi S
on 2024/11/05 03:38
Change comment: edits from section 3.6.3
To version 161.1
edited by Dilisi S
on 2024/11/04 17:36
Change comment: edited 3.6.2

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Details

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1430 1430  [[image:1653356991268-289.png]]
1431 1431  
1432 1432  
1433 -=== 3.6.2 Digital Input Ports: DI1/DI2 ( For LT-22222-L) ===
1433 +=== 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1434 1434  
1435 1435  
1436 1436  (((
... ... @@ -1449,7 +1449,7 @@
1449 1449  
1450 1450  (((
1451 1451  (((
1452 -(% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)When connecting a device to the DI port, both DI1+ and DI1- must be connected.
1452 +(% style="font-size: 11pt; font-variant-alternates: normal; font-variant-east-asian: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-position: normal; white-space: pre-wrap; font-family: Arial, sans-serif; color: rgb(0, 0, 0); font-weight: 400; font-style: normal; text-decoration: none" %)When connecting a device to the DI port, both DI1+ and DI1- must be connected.
1453 1453  )))
1454 1454  )))
1455 1455  
... ... @@ -1560,20 +1560,20 @@
1560 1560  [[image:image-20240219115718-1.png]]
1561 1561  
1562 1562  
1563 -=== 3.6.3 Digital Output Ports: DO1/DO2 /DO3 ===
1563 +=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1564 1564  
1565 1565  
1566 -(% style="color:blue" %)**NPN output**(%%): GND or Float. The maximum voltage that can be applied to the output pin is 36V.
1566 +(% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1567 1567  
1568 -(% style="color:red" %)**Note: The DO pins will float when device is powered off.**
1568 +(% style="color:red" %)**Note: DO pins go to float when device is power off.**
1569 1569  
1570 1570  [[image:1653357531600-905.png]]
1571 1571  
1572 1572  
1573 -=== 3.6.4 Analog Input Interfaces ===
1573 +=== 3.6.4 Analog Input Interface ===
1574 1574  
1575 1575  
1576 -The analog input interface is shown below. The LT-22222-L will measure the IN2 voltage to calculate the current passing through the load. The formula is:
1576 +The analog input interface is as below. The LT will measure the IN2 voltage so to calculate the current pass the Load. The formula is:
1577 1577  
1578 1578  
1579 1579  (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
... ... @@ -1580,14 +1580,14 @@
1580 1580  
1581 1581  [[image:1653357592296-182.png]]
1582 1582  
1583 -Example: Connecting a 4~~20mA sensor
1583 +Example to connect a 4~~20mA sensor
1584 1584  
1585 -We will use the wind speed sensor as an example for reference only.
1585 +We take the wind speed sensor as an example for reference only.
1586 1586  
1587 1587  
1588 1588  (% style="color:blue" %)**Specifications of the wind speed sensor:**
1589 1589  
1590 -(% style="color:red" %)**Red:  12~~24V**
1590 +(% style="color:red" %)**Red:  12~~24v**
1591 1591  
1592 1592  (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1593 1593  
... ... @@ -1600,7 +1600,7 @@
1600 1600  [[image:1653357648330-671.png||height="155" width="733"]]
1601 1601  
1602 1602  
1603 -Example: Connecting to a regulated power supply to measure voltage
1603 +Example connected to a regulated power supply to measure voltage
1604 1604  
1605 1605  [[image:image-20230608101532-1.png||height="606" width="447"]]
1606 1606  
... ... @@ -1609,7 +1609,7 @@
1609 1609  [[image:image-20230608101722-3.png||height="102" width="1139"]]
1610 1610  
1611 1611  
1612 -(% style="color:blue; font-weight:bold" %)**Specifications of the regulated power supply**(% style="color:blue" %)**:**
1612 +(% style="color:blue; font-weight:bold" %)**Specifications of the regulated power**(%%) (% style="color:blue" %)**:**
1613 1613  
1614 1614  (% style="color:red" %)**Red:  12~~24v**
1615 1615  
... ... @@ -1620,9 +1620,9 @@
1620 1620  
1621 1621  
1622 1622  (((
1623 -The LT-22222-L has two relay interfaces, RO1 and RO2, each using two pins of the screw terminal (ROx-1 and ROx-2 where x is the port number, 1 or 2). You can connect a device's power line in series with one of the relay interfaces (e.g., RO1-1 and RO1-2 screw terminals). See the example below:
1623 +The LT serial controller has two relay interfaces; each interface uses two pins of the screw terminal. User can connect other device's Power Line to in serial of RO1_1 and RO_2. Such as below:
1624 1624  
1625 -**Note**: The ROx pins will be in the Open (NO) state when the LT-22222-L is powered off.
1625 +**Note**: RO pins go to Open(NO) when device is power off.
1626 1626  )))
1627 1627  
1628 1628  [[image:image-20220524100215-9.png]]
... ... @@ -1662,13 +1662,13 @@
1662 1662  |**RO1**|For LT-22222-L: ON when RO1 is closed, LOW when RO1 is open
1663 1663  |**RO2**|For LT-22222-L: ON when RO2 is closed, LOW when RO2 is open
1664 1664  
1665 -= 4. Using AT Command =
1665 += 4. Use AT Command =
1666 1666  
1667 -== 4.1 Connecting the LT-22222-L to a computer ==
1667 +== 4.1 Access AT Command ==
1668 1668  
1669 1669  
1670 1670  (((
1671 -The LT-22222-L supports programming using AT Commands. You can use a USB-to-TTL adapter along with a 3.5mm Program Cable to connect the LT-22222-L to a computer, as shown below.
1671 +LT supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to LT for using AT command, as below.
1672 1672  )))
1673 1673  
1674 1674  [[image:1653358238933-385.png]]
... ... @@ -1675,7 +1675,7 @@
1675 1675  
1676 1676  
1677 1677  (((
1678 -On the PC, the user needs to set the (% style="color:#4f81bd" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) to a baud rate of (% style="color:green" %)**9600**(%%) to access to access serial console of LT-22222-L. The AT commands are disabled by default, and a password (default:(% style="color:green" %)**123456**)(%%) must be entered to active them, as shown below:
1678 +In PC, User needs to set (% style="color:#4f81bd" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**)(%%) to active it. As shown below:
1679 1679  )))
1680 1680  
1681 1681  [[image:1653358355238-883.png]]
... ... @@ -1682,12 +1682,10 @@
1682 1682  
1683 1683  
1684 1684  (((
1685 -You can find more details in the [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1685 +More detail AT Command manual can be found at [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1686 1686  )))
1687 1687  
1688 1688  (((
1689 -The following table lists all the AT commands related to the LT-22222-L, except for those used for switching between modes.
1690 -
1691 1691  AT+<CMD>?        : Help on <CMD>
1692 1692  )))
1693 1693