SCHNEIDER M522220000 SA SM_DO16R 16 DIGITAL OUTPUTS MODULE

The Saitel DP platform is a complete set of devices provided by Schneider Electric for real-time

control applications and power line automation. It is a high-technology platform which gives a

solution to the business areas of Schneider Electric.

The following figures show a Saitel DP in chassis (left) and in backplane (right).

Saitel DP’s design has been optimized to meet the most demanding requirements of multiple

sectors:

• Cost-efficiency, minimum downtime, and compliance with electrical safety, electromagnetic

compatibility and environmental standards.

• Safety and reliability requirements for power, gas, water, residual water supply, etc.

• Centralized monitoring and control of geographically distributed systems which support

hierarchical data acquisition and redundant networks.

• Local monitoring and control with data sharing capabilities of plant-distributed devices.

• Quick troubleshooting by means of programmable automation execution.

• One of the most remarkable features of Saitel DP is its modular design. All I/O, CPU, power

supply and communication modules have an identical format, sharing the same enclosure.

The SM_DO16R module includes:

• 16 independent free-contact digital outputs (DO) in two independent blocks. Each DO can be

configured as:

o Single: pulsed (fixed time) or preset (latched).

o Double: pulsed or preset.

• All DO are SPST (Single Pole Single Throw) or NO (Normally open).

• External polarization of DO for each block. According to the P/N, DO signals will be polarized

using 24 VDC or 48 VDC.

• Polarization level is monitored for each block.

• An advanced command safety mechanism is used to control field operation.

• Autocheck of DOs every time that the polarization is reset.

• Control by external watchdog for unsafe situations. The module goes to a safe mode

(commands are blocked) if certain conditions are not met.

• Address and communication rate in the bus are setting using microswitches located on the rear

side.

• 20 LED indicators giving information about the status of the module and each DO.

• The software in the module can be upgrade remotely, from the CPU.

• Isolation of 2.2 kV between field connectors and the controller block.

This module implements hot-swapping function, that is, it can removed and installed on the

backplane while the RTU is working without affecting the proper functioning of the system.

The diagram below illustrates the functional blocks integrated in the SM_DO16R module:

• I/O to the bus: Connection to the bus in the backplane to share information with the CPU.

• LEDs: There are 20 LED indicators on the module’s front side which provide information about

the module and the output signals.

• Synchronization: SM_DO16R is synchronized via a message received from the CPU that

includes information about the time. Therefore, the module will be synchronized with the

synchronization source accuracy used for the CPU.

• Controller block: The controller block supports following functions:

o Parameterization and control of the digital output blocks.

o Advanced digital outputs processing.

o Updating the Indications block with the module status information.

o Interface with the Profibus communication bus to connect with the CPU.

• Digital outputs: SM_DO16R mounts two terminal connectors labeled as J1 and J2 which

allow the 16 digital outputs to be connected to field devices. Each block admits 8 SPST signals

with the following features:

o Permanent output verification and automatic polarization test.

o Independent outputs.

o External polarization (24 or 48 VDC, depending on the P/N).

o Maximum current per signal: 2 A, 30 VDC (Ohmic load).

o Output switching capacity: 50 W, 250 VRMS; L/R ≥ 1 ms.

o Maximum simultaneous current per block 8 A (max. 4 latched outputs).

o Galvanic isolation through optocoupler in polarization blocks and between outputs

and power: 2.2 kVRMS.