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61
PRELIMINARY
2 Theory of Operation (continued)
2.13 Bypass SCR Temperature Detection
2.14 Communication Circuit for RS232
Located on NH-SYS-M board (System MCU and Control Circuit)
Located on NH-SYS-R board (Circuit for RS232, Output Dry Contact, Parallel Port, Connector to connect with each Power Module, Circuit for 2
Slots)
Located on NH-SYS-S or NH-SYS-SA board (Driver Circuit for Bypass SCR)
Located on NH-SYS-M board (System MCU and Control Circuit)
(a) Temperature sensor (NTC) is screwed onto the heat-sink of bypass SCR and connected to CNSA6 on the NH-SYS-S or SA board.
(b) MCU detects the temperature via HS_TEMP (105).
(a) System MCU TX_232 (23) transmits data via RS232 port.
(b) System MCU RX_232 (24) receives data via RS232 port.
RM8 4
RM7 7
G1
CM4 9
5VREF
RM7 6
RM7 9
RM8 7
CM4 8
G1
12
3
DM23
5VS
STS_T H-
(105)
HS_TEMP
7
5
6
2
4 11
UM7B
G1
+12VS
1
2
CNSA6
CON2( 2.54)
STS_TH-
5VREF
G4
RR4 3
5VS
G1
#RX_232
2
3
6
5
8
7
1 4
UR20
CR2 7
G1 5VS
RR2 6
5VS
-12VSF
RR3 1
+12VSF
2
3
6
5
8
7
1 4
UR15
CR2 1
G4+12VSF
RR3 8
+12VSF
RR4 4
RR4 7
D
G
S
QR5
232_RX
232_TX
RR3 7
D
G
S
QR4
RR3 3
G1
#TX_232
RR1 18
1
6
2
7
3
8
4
9
5
CNR6
G4
RS232 Port
232_TX
232_RX
(24)
(23)
RM107
CM5 8
G1
#TX_232
RM111
CM6 2
G1
#RX_232
RX_232
TX_232