| QX Color-Touch OCS unit with built-in Backpack capability. 5.7" TFT Display, 256K Ladder, 32Kb Registers, 2 SmartStack modules supported microSD slot, CsCAN, USB mini-B (programming) and USB-A, on-board Ethernet and two RS232/RS485 serial ports. | |
| QX451 | QX Color-Touch OCS base unit w/8.4" TFT Display, 256K Ladder, 32Kb Registers, On-board Ethernet, CompactFlash slot and 3 serial ports. |
| QX501 | QX Color-Touch OCS unit with built-in Backpack capability. 10.4" TFT Display, 640x480 resolution, 256K Ladder, 32Kb Registers, 2 SmartStack modules supported, microSD slot, CsCAN, USB mini-B (programming) and USB-A, on-board Ethernet and two RS232/RS485 serial ports. |
| QX651 | QX Color-Touch OCS base unit w/12.1" TFT Display, 256K Ladder, 32Kb Registers, On-board Ethernet, CompactFlash slot and 3 serial ports |
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