FRD-57 Remote Display LED, Technical Manual
Rev.2.1, October 2018
Page 4 of 8
4 Installation
Open the rear wall and choose the required connection. The serial connection can be established over
RS232, RS485 or 20mA current loop. Only one of the connections can be used at the same time. The
connections of the unused interfaces must not be connected.
There are two jumpers next to the connection terminal. These are used to select the serial interface.
The communication parameters of the selected interface can be changed via S1 DIP-switch
5 Electrical Connections
Figure 1
Settings DIP Switch (S1)
Baud rate
1200
2400
9600
19200
Dip SW (on)
---
1
2
1,2
Device
FT-1x, FT-10, FT-11x
FT-0x / LDU, DAD14x.x, DAS72.1
FT-0x
Data
N,8,1
N,8,1
E,7,1
Dip SW (on)
3, 4
3
---
Operation mode (Jumper JP1, JP 2)
RS-232
20mA cur.Loop
RS-485
Figure 2
