The 1756-L61 controller is a standard ControlLogix series controller that has been designed by Allen-Bradley/Rockwell Automation.
The 1756-L61 controller supports battery backup and its battery can be replaced when it wears out.
This controller can handle up to 32 tasks at a time, and it can handle up to 100 programs per task.
The 1756-L61 controller can handle up to 250 controller connections and it uses a CompactFlash card for backup memory.
The Allen-Bradley 1756-L61 is a ControlLogix controller. It has 2 MB user memory and 478 kb I/O memory available,
with an optional non-volatile storage memory of 128 MB with the use of 1784-CF128 CompactFlash memory card.
It is a chassis-based controller and can be placed in any available slot of the 1756 ControlLogix chassis.
Compatible chassis for this controller are 1756-A4, 1756-A7, 1756-A10, 1756-A13, and the 1756-A17.
It has an open-style type of enclosure and can support up to a maximum of 250 controller connections.
It also has a built-in RS-232 serial communication port. Supported protocols of the RS232 port are DF1 full/half-duplex, ASCII, DF1 radio modem, Modbus via logic, and DH-485.
It has a maximum digital I/O of 128,000, a maximum analog I/O of 4,000, and a maximum total I/O of 128,000.
Controller tasks of the 1756-L61 include 32 tasks, 100 programs per task, and event tasks: all event triggers.
The 1756-L61 has various communication options, such as ControlNet, Data Highway Plus, EtherNet/IP, DeviceNet,
SynchLink, Remote I/O, and third-party process and device networks.
The current draw of the 1756-L61 controller is 1200 mA at 5.1V DC and 14 mA at 24V DC.
Power dissipation is at 3.5 W and thermal dissipation is 11.9 BTU/hr. It also has a continuous isolation
voltage of 30V and has been tested at 720V DC for 60 s. It has an operating temperature of 0 to 60 Degrees Celsius,
a storage temperature of -40 to 85 Degrees Celsius, and a maximum surrounding air temperature of 60 Degrees Celsius.
Relative humidity is between 5% to 95% (noncondensing) and its vibration is 2 g at 10 to 500 Hz, with operating and non-operating shocks of 30 g and 50 g respectively.
