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.

Product No. : 133819-01

Product type : 3500/60 RTD/TC Non-Isolated I/O Module Internal

Features:

(6) Channels of Temperature Monitoring

Ttemperature Inputs: Resistance Temperature Detector (RTD) and Thermocouple (TC)

Recorder Outputs for each Channel (3500/61)

RTD/TC Non-Isolated or TC Isolated Versions

The GE / Bently Nevada 3500/60 and 3500/61 Series Temperature Monitors Modules provide six

channels of temperature monitoring and accept both Resistance Temperature Detector (RTD) and

Thermocouple (TC) temperature inputs. The modules condition these inputs and compare them against

user-programmable alarm setpoints. The 3500/60 and 3500/61 provide identical functionality except that

the 3500/61 provides recorder outputs for each of its six channels while the 3500/60 does not.

The user programs the modules to perform either RTD or TC temperature measurements using the 3500

Rack Configuration Software. Different I/O modules are available in RTD/TC non-isolated or TC isolated

versions. The user can configure the RTD/TC non-isolated version to accept either TC or RTD, or a mixture

of TC and RTD inputs. The TC isolated version provides 250 Vdc of channel-to-channel isolation to protect

against external interference.

When used in a Triple Modular Redundant (TMR) configuration, temperature monitors must be installed

adjacent to each other in groups of three. When used in this configuration, the system employs two types

of voting to ensure accurate operation and to avoid single-point failures.