Endress+Hauser SpectraSensors 2-Pack Analyzer System Hardware Installation And Maintenance Manual page 24

2-Pack Analyzer System
TERMINAL BLOCK TB2,
OUTPUT SIGNALS
BACKPLANE
ARM9 CONTROL
BOARD STACK
ALARM/
SIGNAL
RELAYS
TERMINAL
BLOCK (TB3),
INTERNAL
PRESSURE/
TEMPERATURE
–
1 12
NO
COMMON
NC
Figure 1–7 Analyzer A ARM9 electronics control board
(DC) showing signal terminal block and alarm relays
RELAY DRIVER AND 4-20 mA
CONTROL BOARD STACK
- +
24 V
ASSIGNABLE ALARM
GENERAL FAULT
ALARM
4900002256 rev. B 4-13-21
HYTEK
TEMPERATURE
CONTOLLER
FUSE (F3)
SIGNAL
CONVERTER
RS-232 TO
RS-485
(OPTIONAL)
DC POWER
SUPPLY
COMPONENT
GROUND
PROTECTIVE
GROUND
FUSE (F1)
CUSTOMER
GROUND