Instruction Manual

2-27
2-6 BL-U1 Connections and Wiring
Installation
2
 Pin layout for BL-U1 reader port
BL-U1 Dipswitch Settings
Set the interface to "RS-485 multi-drop" with the BL-U1 dipswitches. Refer to "Wiring an RS-
485" (Page 2-30) for more information on "RS-485 Terminator."
Pin
number
Symbol Explanation
Signal
direction
1 TIM Trigger input Output
2 RD (RXD) Send RS-232C data Output
3 SD (TXD) Recieve RS-232C data Input
4 OK OK Input
5 GND (SG)
Ground
(Common ground for all signals)
-
6 NG NG Input
7 RS (RTS) RS-232C send capable Input
8CS (CTS)
RS-232C request send (controllable via
dipswitch)
"BL-U1 Dipswitch Settings" (Page 2-27)
Output
9 +5V +5 V power source (1.5A) Output
6789
12345
D-sub9 pin (male)
DCE specification (modem
definition)
#4-40screws (female)
Dipswitch number 1 2 3 4 5 6
Interface selection
RS-232C ON OFF OFF
RS-422A OFF ON OFF
RS-485 Multi-drop OFF OFF ON
RS-422A Terminator
(100 )
OFF OFF
ON ON
RS-485 Terminator
(100 )
OFF OFF
ON ON
Select Reader port CS
control method
Reflects whether the RS-232 CS
is on or off
OFF
Usually on ON
123456
OFF
ON
*The diagram at the left
shows the factory settings.