ABB AC500 PLC - Page 156

XC = eXtreme Conditions
Extreme conditions
Terminal units for use in extreme ambient conditions have no sign for XC ver-
sion.
The figure 4 in the Part No. 1SAP4... (lable) identifies the XC version.
The input/output modules (decentralized communication interface modules) plug into the I/O ter-
minal unit. When properly seated, they are secured with two mechanical locks. All the electrical
connections are established via the terminal unit, which allows removal and replacement of the
I/O modules without disturbing the wiring at the terminal unit.
The I/O terminal units TU515, TU516, TU516-H and TU542 are specifically designed for use
with AC500/S500 I/O modules that incorporate only 24 VDC or analog inputs/outputs.
Screw terminals Spring terminals
Conductor
1.5
1.6
1.7
1.8
1.9
Screwdriver Conductor
1.5
1.6
1.7
1.8
1.9
Screwdriver
(opens ter-
minal)
For information about wiring specifications see Ä Chapter 2.6.4.3 “Terminals at
the Terminal Unit” on page 1274.
For a detailed description of the mounting, disassembly and electrical connec-
tion of the terminal units and the I/O modules, please refer to the "System
Assembly, Construction and Connection" chapter Ä Chapter 2.6.3 “Mounting
and Demounting” on page 1261.
The following terminals are used for connection of the process supply voltage .
XC Version
Terminals
Device Specifications
Terminal Units (AC500 Standard) > TU515, TU516, TU516-H and TU542 for I/O Modules
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