RKI Instruments RM-5000 Series Indicator/Alarm Unit - Manual (Page 14)

3 Product Components 3-3. Block diagram
RM-5000 - 14 -
3-3. Block diagram
*1: Installed only in GP-5001, NC-5001, NC-5001W, NP-5001, SP-5001, GH-5001, OX-5001.
*2: Only on a model with RS-485 (option) mounted.
Reset signal input
Test input
Buzzer stop
signal input
Controller
(CPU)
POWER INPUT (24 VDC)
Power supply part
Gas alarm contact (ALM1,
ALM2)
Fault alarm contact (FAULT)
* Standard setting of
contact activation
• De-energized
(De-energized at a
normal state)
• ON-ALARM
(Closed contact at an
alarm state)
Alarm contact controller
Transmitter
4-20 mA DC transmission
Digital data (RS-485)
transmission (*2)
Gas alarm signal
(ALM1, ALM2) output
Fault alarm signal
(FAULT) output
Amplifier (*1)
Controller
(CPU)
LCD display
Bar meter, gas name display,
concentration display, unit display, etc.
Lamp
(POWER) (ALM1) (ALM2) (FAULT)
Operating unit
(MODE) (ALM2/▲) (ALM1/▼)
(TEST/SET)
Alarm signal controller
Control signal input
Detector head (option)