Panasonic WJ-RT208 manual RS485 Connection, Pin No Signal Operation Remarks

■RS485 Connection

A 25-pin connector is used to accept and supply control signals.

Internal block diagram

13 1

RA

RB

25TERMINAL/CONTROL 14

TA

TB

Pin No.	Signal	Operation	Remarks
1	TA	RS485 camera sending + data
2	TB	RS485 camera sending – data
3	RA	RS485 camera receiving + data
4	RB	RS485 camera receiving – data
5	Terminal input 1
6	Terminal input 2		The requirements of the alarm
			signal level are as follows:
7	Terminal input 3
		When an alarm occurs in channels 1	Low level: 0 V to 0.8 V
8	Terminal input 4
		– 8, the alarm signals are sent to the	High level: more than 3.3 V
9	Terminal input 5
		recorder through these ports.	(max. 12 V)
10	Terminal input 6
			Pulse width: 2 s or more
11	Terminal input 7		3 s or less
12	Terminal input 8
13	+12 V	+12 V voltage output
14	Grounding
15	Alarm Output 1 (N.O.)	Sends the alarm signal to external
16	Alarm Output 1 (N.C.)	alarm unit 1.
17	Alarm Output 1 (Common)
18	Alarm Output 2 (N.O.)	Sends the alarm signal to external	q Relay output: max. 30 VDC,
19	Alarm Output 2 (N.C.)	alarm unit 2.	1 A or 125 VAC, 0.3 A
20	Alarm Output 2 (Common)
21	Alarm Output 3 (N.O.)	Sends the alarm signal to external
22	Alarm Output 3 (N.C.)	alarm unit 3.
23	Alarm Output 3 (Common)
24	Grounding
25	Grounding

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