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51
Modeswitch
Communication between the recorder and a system device using PS·Data can be performed by RS 485 interface. Devices on
both ends of the RS485 connection are necessary to be terminated.
The mode switch setting differs depending on whether to use the recorder as a receiver or a system controller.
When connecting RS485 cameras to the recorder, devices on both ends of the connection are necessary to be terminated.
• Whentherecorderisontheendoftheconnectionwithasys-
tem controller
PS·Data termination switch 1: On
• Whentherecorderisontheendoftheconnectionwitha
device controller
PS·Data termination switch 2: On
• WhenconnectingRS485cameras
Set the termination switch of the RS485 port to which the
RS485 camera is connected
Connect to the RS485 port 1: Set the termination switch of
the RS485 port (1) to "On".
Connect to the RS485 port 2: Set the termination switch of
the RS485 port (2) to "On".
• Whenconnectingin2-wireconnection
Connect to the RS485 port 1: Set no. 2 and no. 3 to "On".
Connect to the RS485 port 2: Set no. 5 and no. 6 to "On".
• Whenconnectingin4-wireconnection
Connect to the RS485 port 1: Set no. 2 and no. 3 to "Off".
Connect to the RS485 port 2: Set no. 5 and no. 6 to "Off".
RS485 port
RA
RB
TA
TB
Inside block diagram
TBTARARB
DATA
GND GND
IN OUT
6 7 81 2 3 4 5
ON
RS485 (1) Termination switch
RS485 (1) 2-wire/4-wire
connection switch
RS485 (2) Termination switch
RS485 (2) 2-wire/4-wire
connection switch
PS·Data termination switch 1
PS·Data termination switch 2