Hitachi CU-HD500 Operating Instructions Manual page 29

Service information
COMMUNICATION (25pin D-sub male:RDBD-25P-LNA(4-40)(55))
Contact
supply
Voltage
supply
1
14
Plug CU mainframe
Pin Pin
1 1 SYS2
2 2 SYS1
3 3 SYS0
4 4 PD OUT (C)
5 5 PD OUT (H)
6 6 PD SHIELD
7 7 PD IN (C)
8 8 PD IN (H)
9 9 ENG OUT (C)
10 10 ENG OUT (H)
11 11 ENG SHIELD
12 12 ENG IN (C)
13 13 ENG IN (H)
14 14 GND
15 15
16 16 NC
17 17 TALLY COMMON
18 18 G TALLY IN
19 19 R TALLY IN
20 20 NC
21 21 PGM2 IN(C)
22 22 PGM2 IN (H)
23 23 PGM SHIELD
24 24 PGM1 IN(C)
25 25 PGM1 IN (H)
17
18
19
TALLY COMM
TALLY IN
13
25
Signal
2W : OUT/IN(C)
2W : OUT/IN(H)
2W : NC
2W : NC
2W : OUT/IN(C)
2W : OUT/IN(H)
2W : NC
2W : NC
→TALLY COMM
→G TALLY IN
→R TALLY IN
TALLY ; CU internal circuit
Voltage Contact
supply supply
24V
17