75
■
Mode Switch
RS485 interface is used to communicate between this unit and the PS·Data compatible system device ,. In this case, it is
required to terminate the both devices on the both ends of the RS485 connection.
The settings of the mode switch will be different whether this unit is used as a receiver or a controller.
When an RS 485 camera is connected to this unit, it is required to terminate the both devices on the both ends of the connec-
tion.
• When connecting this unit with the system controller and
this unit is installed at the end of the PS·Data connection
PS·Data termination switch 1: ON
• When connecting a system device and this unit is installed
at the end of the PS·Data connection
PS·Data terminating switch 2: ON
• When connecting RS485 cameras
Set the termination switch of the connected RS485 (CAMERA)
port to ON.
Connected to the RS485 (CAMERA) port 1: Set the RS485 (1)
termination switch to ON.
Connected to the RS485 (CAMERA) port 2: Set the RS485 (2)
termination switch to ON.
• For 2W communication
Connected to the RS485 (CAMERA) port 1: Set the switch No.2 and No.3 to ON.
Connected to the RS485 (CAMERA) port 2: Set the switch No.5 and No.6 to ON.
• For 4W communication
Connected to the RS485 (CAMERA) port 1: Set the switch No.2 and No.3 to OFF.
Connected to the RS485 (CAMERA) port 2: Set the switch No.5 and No.6 to OFF.
■
RS485 Port
6 7 8
1 2 3 4 5
ON
RS485 (1) terminating switch
RS485 (1) 2/4-wire changeover
RS485 (2) terminating switch
RS485 (2) 2/4-wire changeover
PS•Data terminating switch 1
PS•Data terminating switch 2
RB
RA
TB
TA
DATA
G
N
D
G
N
D
Output Input
RA
RB
TA
TB
Internal block diagram
Summary of Contents for WJHD316 - DIGITAL DISK RECORDER
Page 4: ...4 CONTENTS...
