SM-I/O PELV Termination

Features

The SM-I/O PELV is designed to meet the I/O requirements of chemical and similar industries. The Solutions Module provides additional galvanic isolation to that within the drive itself. The requirements of PELV (Protective Extra Low Voltage) according to IEC 61800-5-1, and Namur NE37are met.

All terminals on the SM-I/O PELV have the following provisions for electrical safety:

• Decisive voltage class A according to IEC 61800-5-1, i.e. less than 30Vac r.m.s., 42.4Vac peak, 60Vdc mean
• Protective separation from live parts, comprising supplementary insulation in conjunction with the basic insulation of the drive control circuits, suitable for all supply voltages and configurations for which the drive is intended.

The PELV circuit is permitted to be grounded. This connection must be made externally if required.

Note that PELV circuits do not require protection against contact, but this applies only when used within a zone of equipotential bonding. For further guidance on safety requirements and PELV consult the relevant electrical safety code for the region where the Solutions Module will be used.

The SM-I/O PELV can be used on the following products:

• Unidrive SP
• Commander SK

The SM-I/O PELV increases the I/O capability of the drive by adding the following to the existing I/O:

• 2 x Analogue current outputs
• 1 x Analogue current input
• 4 x Digital inputs/outputs
• 1 x Digital input
• 2 x Relays (30Vdc contact rating)

All connections from the Solutions Module to the drive are made via the drive connector.
Connections from external equipment to the 24V voltage input, relays, digital and analogue I/O are made via a 17-way pluggable screw connector.
On the Unidrive SP a total of three SM-I/O PELV modules can be fitted at any one time. On the Commander SK only one can be fitted.