RFL Electronics GARD 8000 - Figure 4-5. Pin-Outs RS-449, X.21, V.35

Installation and Commissioning
GARD 8000 SYS RFL Electronics
November 28, 2017 4-10 973.334.3100
DB-37 Male DTE Pinout for RS-449/X.21/ V.35 (Loop Timing)
Timing from External Equipment to the GARD
DB-37 Male DCE Pinout for RS-449/X.21/ V.35 (Internal Timing)
Timing from GARD to External Equipment
Chassis Ground
1
RD (A) (Receive Data A)
SD (A) (Send Data A)
2 3 4 6 7 8 11 1213
RT (B) (Receive Timing B)
14 18
202122
SD (B) (Send Data B)
RD (B) (Receive Data B)
RT (A) (Receive Timing A)
Not Used
9 10 16155
Not Used
Not Used
Not Used
17
STT (A) Not used on X.21
Not Used
19
Signal Ground
Not Used
23
Not Used
24
25
Not Used
262728293031
Not Used
37 36 35 34 33
32
STT (B) Not used on X.21
Not Used
Chassis Ground
1
RD (A) (Receive Data A)
SD (A) (Send Data A)
2 3 4 6 7 8 11 1213
RT (B) (Receive Timing B)
14 18
202122
SD (B) (Send Data B)
RD (B) (Receive Data B)
RT (A) (Receive Timing A)
Not Used
9 10 16155
Not Used
Not Used
17 19
Signal Ground
Not Used
23
24
25
Not Used
262728293031
Not Used
37 36 35 34 33
32
ST (A) Not used on X.21
ST (B) Not used on X.21
Figure 4-5. Pin-Outs RS-449, X.21, V.35