User Instructions

www.pulsar.pl INTR
3
Features:
 power supply via the „SERIAL” socket
 connection of the PSU of PSBEN or EN54 series with the RS485 bus
 easy connection
 galvanic isolation
 half-duplex communication system
 cooperation with PowerSecurity program
 optical indication
 warranty - 5 years from the production date
1. General description.
The RS485-TTL ”INTR” interface enables connecting the PSU of PSBEN and EN54 series to the RS485
bus with full galvanic isolation. The RS485 bus is a two-wire, differential, half-duplex communications bus, where
transmitting and receiving data is alternate
2. Components arrangements.
The picture below shows the arrangement of the most important components and connectors of the
RS485-TTL interface on the PCB.
Fig.1. The view of the RS485-TTL interface.
Table 1. Description of the components.
Element
No.
Description
[1]
Connector of the RS485 bus
A+, B- - RS485 data transmission
SG - signal ground
[2]
TTL cable – for connection with the PSU
[3]
LEDs – optical indication:
PWR – supply voltage indication
TX – data transmission
RX – receiving data