Denso BHT-7500S, BHT-7500W user manual Pin No Signal Functions Signal Input/Output

[ 3 ] Interface Specifications

131

		25	14
		RS-232C Interface Port (Dsub-25S) on the CU-7000
Pin No.	Signal	Functions		Signal Input/Output
				CU-7000	External
					device
1	FG	Frame ground			Ñ
2	SD	Send data			→
3	RD	Receive data			←
4	RS	Request to send			Ñ
5	CS	Ready to send			Ñ
6	DR	Data set ready			Ñ
7	SG	Signal ground			Ñ
8	CD	Carrier detect			Ñ
20	ER	Data terminal equipment ready			Ñ

Shown below is a diagram of the internal connection in the CU-7000.

Host computer,
modem, or
other devices
Signal
	Pi	n	No.
Name
FG	1			Not used.
SD	2
RD	3

CU-7000

RS-232C

Interface

Circuitry

Optical Interface
Optical
Communications	BHT
Interface
Circuitry

RS	4
CS	5
DR	6
ER	20
CD	8
SG	7

174