Black Box IC483C, IC483AE, IC481C-R2, IC481A-R2 manual Ground Strap and Pin Connections

CHAPTER 4: Ground Strap and Pin Connections

4.Ground Strap and Pin Connections

4.1Ground Strap

Signal grounds (Pins 19, 20, and 37 on the 422 interface and Pin B on the V.35 interface) are connected together, but not connected to chassis ground (Pin A). However, for applications requiring the grounds at a common reference point, the grounds can be connected by installing a jumper strap across W3 located at the rear of the printed circuit board between J1 and P1.

CHASSIS GROUND	A	B	SIGNAL GROUND
REQUEST TO SEND	C	D	CLEAR TO SEND
DATA SET READY	E	F	RECEIVE LINE SIGNAL DETECT
DATA TERMINAL READY	H	J	LOCAL LOOPBACK
TEST MODE	K	L	TEST PATTERN
TRANSMITTED DATA	P	R	RECEIVED DATA
TRANSMITTED DATA	S	T	RECEIVED DATA
TRANSMIT TIMING	U	V	RECEIVE TIMING
TRANSMIT TIMING	W	X	RECEIVE TIMING
TRANSMIT TIMING	Y
TRANSMIT TIMING AA		BB	REMOTE LOOPBACK

Figure 4-1. V.35 Interface

RECEIVE COMMON 20	1	SHIELD
	2
21
	3
SEND DATA 22
	4	SEND DATA
SEND TIMING 23	5	SEND TIMING
RECEIVE DATA 24
	6	RECEIVE DATA
REQUEST TO SEND 25
	7	REQUEST TO SEND
RECEIVE TIMING 26	8	RECEIVE TIMING
CLEAR TO SEND 27	9	CLEAR TO SEND
28
	10
DATA MODE 29
	11	DATA MODE
TERMINAL READY 30	12	TERMINAL READY
RECEIVER READY 31	13	RECEIVER READY
32
	14

3315

3416

TERMINAL TIMING 35	17	TERMINAL TIMING
36
	18
SEND COMMON 37
	19	SIGNAL GROUND

Figure 4-2. RS-422 Interface.

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