ABB AC500 PLC Hardware Manual page 879

1.7.4.1.1 Intended Purpose
The Modbus TCP bus module CI521-MODTCP is used as decentralized I/O module in Modbus
TCP networks. The network connection is performed via 2 RJ45 connectors which are inte-
grated in the terminal unit. The bus module contains 22 I/O channels with the following proper-
ties:
● 4 analog inputs (1.0...1.3)
● 2 analog outputs (1.5...1.6)
● 8 digital inputs 24 V DC in 1 group (2.0...2.7)
● 8 digital outputs 24 V DC in 1 group (3.0...3.7)
The inputs/outputs are electrically isolated from the Ethernet network. There is no potential sep-
aration between the channels. The configuration of the analog inputs/outputs is performed by
software.
For usage in enhanced ambient conditions (e.g. wider temperature and humidity range), a spe-
cial XC version of the device is available.
1.7.4.1.2 Functionality
Parameter
Interface
Protocol
Power supply
Supply of the electronic circuitry of the I/O
expansion modules attached
Rotary switches
Analog inputs
Analog outputs
Digital inputs
Digital outputs
LED displays
External supply voltage
Required terminal unit
1.7.4.1.3 Electrical Connection
The Ethernet bus module CI521-MODTCP is plugged on the I/O terminal unit TU507-ETH or
TU508-ETH
face Modules" on page 145. Properly seat the module and press until it locks in place. The ter-
minal unit is mounted on a DIN rail or with 2 screws plus the additional accessory for wall
mounting (TA526
The electrical connection of the I/O channels is carried out using the 30 terminals of the I/O ter-
minal unit. I/O modules can be replaced without re-wiring the terminal units.
2019/04/17
Ä Chapter 1.4.1 "TU507-ETH and TU508-ETH for Ethernet Communication Inter-
Ä Chapter 1.8.2.4 "TA526 - Wall Mounting Accessory" on page 1152).
3ADR010121, 13, en_US
Communication Interface Modules (S500) > Modbus
Value
Ethernet
Modbus TCP
From the process supply voltage UP
Through the expansion bus interface (I/O bus)
for setting the last BYTE of the IP (00h to FFh)
4 (configurable via software)
2 (configurable via software)
8 (24 VDC; delay time configurable via soft-
ware)
8 (24 VDC, 0.5 A max.)
For system displays, signal states, errors and
power supply
Via terminals ZP, UP and UP3 (process supply
voltage 24 VDC)
TU507 or TU508 Ä Chapter 1.4.1 "TU507-ETH
and TU508-ETH for Ethernet Communication
Interface Modules" on page 145
Device Specifications
879