ABB RET 54 Series Technical Reference Manual, General page 100

RET 54_
100
Transformer Terminal
Technical Reference Manual, General
The serial interface RS-485 on the rear panel (connector X3.3) is used for
connecting the transformer terminal to the SPA bus or the LON bus. The SPA/LON
bus is connected via the connection module type RER 103 (ordering number:
RER103-xx) fitted to the 9-pin D-type subminiature connector and screwed to the
rear panel.
The connectors X4.1...X7.2 are 18-pin detachable multi-pole connector strips with
screw terminals. The male part of the multi-pole connector strips is fastened to the
printed circuit boards. The female parts, including accessories, are delivered
together with the transformer terminal. The female connector part can be secured
with fixing accessories and screws. One max. 1.5 mm
wires can be connected to one screw terminal.
The digital inputs and outputs (contacts) of the transformer terminal are connected
to the multi-pole connectors X4.1...X7.2. The auxiliary power supply is connected
to the terminals X4.1:1 (plus polarity) and X4.1:2 (minus polarity). When the RTD/
analog module is used, the inputs and outputs are connected to the terminals X6.1:1
and X6.1:2. The transformer terminal self-supervision output IRF is linked to the
terminals X4.1:3, X4.1:4 and X4.1:5.
Protective earth is connected to the screw marked with the earth symbol.
The connectors are designated according to the module slot in the RET 54_
transformer terminal.
Connector Description
X1.1 connector for transformer inputs (current and voltage trafos) (module slot 1)
X3.1 not used, reserved for future purposes (slot 3)
X3.2 connector for RS-232 interface (slot 3)
X3.3 connector for RS-485 interface (slot 3)
X3.4 connector for the external display module (slot 2)
X4.1 upper connector for combined I/O and power supply module PS1/PS2 (slot 4)
X4.2 lower connector for combined I/O and power supply module PS1/PS2 (slot 4)
X5.1 upper connector for I/O module BIO1 (slot 5)
X5.2 lower connector for I/O module BIO1 (slot 5)
X6.1 upper connector for I/O module BIO1 (slot 6), RET 545
upper connector for RTD/analog module (slot 6), RET 541 or RET 543 with
RTD/analog module
X6.2 lower connector for I/O module BIO1 (slot 6), RET 545
lower connector for RTD/analog module (slot 6), RET 541 or RET 543 with
RTD/analog module
X7.1 upper connector for I/O module BIO2 (slot 7)
X7.2 lower connector for I/O module BIO2 (slot 7)
1MRS755225
2
wire or two max. 0.75 mm
2