Endress+Hauser SS500 - Page 24

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