RKI Instruments RM-5000 Series Indicator/Alarm Unit - Manual (Page 18)

4 How to Use 4-3. Precautions for system designing
RM-5000 - 18 -
If load is to be activated, appropriate measures must be taken to stabilize the operation of the
indicator/alarm unit and protect the alarm contact referring to the following information.
• Relay it with an external relay at a lower voltage of 100 VAC or below (contact amplification). At the same
time, the surge absorbing part SK1 suitable for the specifications must be attached to the external relay.
• In addition, the surge absorbing part SK2 must be attached to the loaded side of the external relay if
necessary.
• It may be recommended that the surge absorbing part should be attached to the contact for certain load
conditions. It must be attached to an appropriate position by checking how the load is activated.
RM-5000
Load
SK1 SK2
Coil
Power supply Power supply Alarm contact
External relay
(low voltage relay)
* SK1, SK2: Surge absorbing parts