B7A Interface Unit Settings; Connecting The B7A Unit To The B7A Interface Unit - Omron NT30C-ST141-E Operation Manual

Connection of Expanded I/O

2-9-5 B7A Interface Unit Settings

Caution

2-9-6 Connecting the B7A Unit to the B7A Interface Unit

(2) As shown in the figure below, install the NT30/30C on the rear face of the
NT30/30C, and secure it with the two mounting screws.
Set the operating conditions of the B7A Interface Unit as shown below.
ON
D D D D
1 2 3 4
SW1-1
Function Processing on
transmission error
ON LOAD OFF (clear)
OFF HOLD
Be sure to switch OFF the power supply to both the NT30/30C and the B7A Inter-
face Unit before changing DIP switch settings.
The connection method for each B7A Unit is shown on the following pages.
Use the cable indicated below for the connection:
2
VCTF0.75 mm or greater transmission cable
S Power supply method
A 24 VDC power supply for communication must be supplied to the B7A Inter-
face Unit and the B7A Unit. The connection method differs depending on the
method used to supply power to the Units.
S Setting the transmission delay time
When the setting for transmission delay time is for high-speed transmission, use
a shielded cable. If no shielded cable is used, the maximum transmission dis-
tance will be 10 m regardless of the method used to supply power.
Ground the shield. Do not ground it to the minus terminal of the power supply.
Mounting screws
SW1-2 SW1-3
Transmission ERR indicator
delay time status
High speed Indicator lights
(3 ms)
Standard Indicator does
(19.2 ms) not light
Section 2-9
SW1-4
Not used
--
Setting fixed
as OFF
67