From Temposonics instructions:
Instructions for connection
• Use low-resistant twisted pair and shielded cables and connect the shield to ground externally via the controller equipment
.• Keep control and sign leads separate from power cables and sufficiently far away from motor cables, frequency inverters, valve lines, relays, etc
.• Use only connectors with metal housing and connect the shielding to the connector housing.
• Keep the connection surface at both shielding ends as large as possible.
• Keep all non-shielded leads as short as possible.
• Keep the earth connection as short as possible with a large cross section. Avoid ground loops.
• With potential differences between machine and electronics earth connections, no compensating currents are allowed to flow across the cable shielding. Recommendation: Install potential compensating leads with large cross section, or use cables with separate double shielding, and connect only one end of the shield.
• Use only stabilized power supplies in compliance with the specified connecting values