The Allen Bradley 1756-M08SEG is a SERCOS interface module that can connect to SERCOS interface drives that are Extended Pack Profile compliant. It has 8 available axes but you can only use the AXIS_GENERIC_DRIVE data type for it. A maximum of 32 axes can be used in a single controller. You can only control the drives in position mode and it has LED SERCOS ring status indicators that let you monitor its current status.
The 1756-M08SEG module has two available SERCOS data rates, which are 4 Mbps and 8 Mbps. At 4 Mbps, the SERCOS cycle time is 0.5 ms for up to 2 drives (exclusive to Kinetix 6000 drives), 1 ms for up to 4 drives, and 2 ms for up to 8 drives. The SERCOS cycle time at 8 Mbps is 0.5 ms for up to 4 drives (also exclusive to Kinetix 6000 drives), 1 ms for up to 8 drives, and 2 ms for up to 16 drives.
This module has a backplane current of 760 mA at 5V DC and 2.5 mA at 24V DC. It also has a power dissipation of 5.1 W. It operates at a temperature between 0 to 60 Degrees Celsius. It can be stored at a temperature between -40 to 85 Degrees Celsius. The 1756-M08SEG module also has a non-condensing relative humidity of 5% to 95%. It also has a vibration of 2 g at 10 to 500 Hz, an operating shock of 30 g, and a non-operating shock of 50 g.
The 1756-M08SEG module is a chassis-based module that can be installed in any available slot. It is important to install and ground the power supply and ControlLogix chassis before connecting the module with a fiber-optic cable wire. The wire is important because it connects the module with the Extended Pack Profile compliant drives and only fiber-optic cable wires are compatible with it. The ControlLogix chassis compatible with this module include the 1756-A4, 1756-A7, 1756-A10, 1756-A13, and the 1756-A17
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| Manufacturer | Rockwell Automation |
| Brand | Allen Bradley |
| Part Number/Catalog No. | 1756-M08SEG |
| Series | ControlLogix |
| Module Type | Generic Servo Interface Module |
| Axes per Module | 8 |
| Axes per Controller | 32 |
| Backplane Current (5Volts) | 760 milliamps |
| Backplane Current (24Volts) | 2.5 milliamps |
| Power Dissipation | 5.1 Watts |
| SERCOS Data Rate | 4 or 8 Megabits-Second |
| Current Draw (5.1 Volts) | 1.2 amps |
| Power Dissipation | 6.2 Watts |
| Thermal Dissipation | 21.2 BTU-hour |
| Isolation Voltage | 50 Volts Continuous |
| Enclosure | None |