Ohaus DEFENDER 5000 BENCH SCALES Relay Option Kit Manual multi - Manual (Page 4)

EN-2 Relay Option Kit
2. INSTALLATION
2.1 Safety Precautions
For safe and dependable operation of this equipment, please comply with all safety
precautions mentioned in this manual.
• Installation of these options should only be performed by qualified personnel.
• Disconnect all equipment from the mains power supply before beginning
installation.
• If batteries are installed in the indicator’s battery compartment, remove them
before beginning installation.
• If the rechargeable battery option is installed in the indicator, disconnect the
battery from the charging pc board before beginning installation.
2.2 Relay Wiring Guidelines
WARNING: WHEN MAKING ANY LINE VOLTAGE CONNECTIONS TO THE
AC RELAY OPTION, FOLLOW NATIONAL ELECTRICAL CODE (NEC) OR
LOCAL AUTHORITY WIRING STANDARDS AND SAFETY PRACTICES.
IMPORTANT: WHEN CONNECTING ANY AC LINE SUPPLIED DEVICE TO
THE RELAY OPTION, ENSURE THAT EACH EXTERNAL DEVICE UTILIZES A
PROPERLY GROUNDED AC CONNECTION.
• For connections to nominal 120 VAC or 220-240 VAC systems, use only
insulated wire sets rated to the local electrical code requirements.
• The wire sets used for connection to the relay option pc board must be part of a
multi-conductor cable with a smooth, round outer insulating jacket.
• Do not run more than one cable through the strain relief bushing.
• Do not use the cable that connects to the relays to make other connections.
• The indicator’s strain relief bushing only permits cable diameters from 0.16 to
0.31 inch (4 to 8 mm).
• The terminal block on the relay pc board only permits wire sizes of 26 to 16 AWG
(0.14 to 1.5 mm 2 ). Strip the wire ends to 0.25 inch (6 mm).