RKI Instruments RM-5000 Series Multi-Unit Case - Manual (Page 18)

5 Connection between Devices 5-1. Connection of power supply
RM-5000 Multi-unit Case - 18 -
5
Connection between
Devices
5-1. Connection of power supply
The power supply specifications of the multi-unit case are 100 to 240 VAC +/-10%, 50/60 Hz. Prepare a
power supply that complies with the specifications.
Before supplying power, connect the multi-unit case to your grounding terminal. The grounding resistance
must be D type (below 100 Ω). After the multi-unit case is grounded and it is in a safe state, connect the
power supply and other cables.
5-2. Connection to contact output
The indicator/alarm unit outputs the individual alarm contacts, i.e., the first and second alarm contacts and
fault alarm contact. The buzzer unit outputs the common first and second alarm contacts and common fault
alarm contact.
The contact capacities are 100 VAC 0.5 A and 30 VDC 1.5 A (all resistant loads). Configure an auxiliary
relay circuit when you connect a load over the contact capacities.
5-3. Connection to 4 - 20 mA output
Individual 4 - 20 mA signals from the indicator/alarm unit are output.
The maximum allowable load to be connected is 300 Ω. Use a shielded cable equivalent to CVVS for
connection.
5-4. Connection to RS-485 output
From the terminal plate for the buzzer unit, the RS-485 from the indicator/alarm unit (option of the
indicator/alarm unit) is output.
The allowable load to be connected depends on the system designing conditions. Use a shielded cable
equivalent to KPEV-S for connection.
5-5. Connection to signal inputs
To the terminal plate for the buzzer unit, buzzer stop signals (only if the buzzer unit and the indicator/alarm
unit are the lock-in type), alarm test signals, and reset signals can be input.
Use the no-voltage "a" contact for input signals.