44214-0898 <90-00005>
P
AGE
9
INSTALLATION
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CIRCUIT SIDE
OF PC BOARD
COMPONENT SIDE
OF PC BOARD
Reserved
Reserved
Reserved
Reserved
ALB (TTL)
DLB (TTL)
4-Wire RCV or 2-Wire XMT/RCV
4-Wire RCV or 2-Wire XMT/RCV
4-Wire XMT
4-Wire XMT
-21 to -56 VDC
DTR (TTL)
RTS (TTL)
RD (TTL)
TD (TTL)
CTS (TTL)
CD (TTL)
Signal Ground
DSR (TTL)
TD (RS-232)
DTR (RS-232)
RTS (RS-232)
Ground
CD (RS-232)
CTS (RS-232)
DSR (RS-232)
RD (RS-232)
RX- (RS-422)
RX+ (RS-422)
CD- (RS-422)
CD+ (RS-422)
RTS+ (RS-422)
RTS- (RS-422)
TX+ (RS-422)
TX- (RS-422)
TX+ (RS-485)
TX- (RS-485)
RX- (RS-485)
RX+ (RS-485)
When it is necessary to wire directly to the 44214 4-Wire Mo-
dem, refer to Fig. 4 for the pin designation.
F
IG
. 4 - P
IN
D
ESIGNATIONS
