Siemens SIMATIC ET 200SP HA System Manual page 88

Wiring
6.5 Wiring the terminal block
①
②
③
④
P1
P2
Figure 6-6
Note
Specific designations of the process terminals in the wiring and block diagrams of the I/O
modules / terminal blocks
● RES: Reserved, these process terminals must be left unconnected for future expansions
● n.c.: Not connected, these process terminals have no function. However, they can be
connected to potentials specifically defined for a module, for example, for the laying unused
wires.
Supply voltage
Connect the supply voltage to a light-colored terminal block. The following two tables show the
terminal blocks to which you need to connect the cables of the supply voltage.
Table 6-3
Potential
● Ground
● L+
88
Push-in terminal
Spring release
Measuring tap
(suitable probes: Diameter 1.0 mm, cone height max 1.15 mm; length ≥ 10 mm in compliance
with the approved voltage category)
Holder for shield contact
Supply voltage L+: The terminal assignment depends on the type of terminal block (see tables
in the following section "Supply voltage")
Supply voltage M
View of the terminal block (example for the terminal block TB22-P32+4B/T)
Connection terminals for the supply voltage on the terminal block TB22.../ TB45-P32...
Terminals on the terminal block
● 1P2 and 2P2
● 1P1 and 2P1
Note: Terminals connected
Labeling of the terminal Voltage on the power
Blue
Red
ET 200SP HA Distributed I/O system
System Manual, 08/2019, A5E39261167-AD
bus
● P2
● P1