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.