Specifications

Installing an S7-200 PLC
2-11
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
The following descriptions are an introduction to general isolation characteristics of
the S7-200 family, but some features may be different on specific products.
Consult your product specifications in Appendix A for information about which
circuits include isolation boundaries and the ratings of the boundaries. Isolation
boundaries rated less than 1,500 VAC are designed as functional isolation only,
and should not be depended on as safety boundaries.
 Logic circuit reference is the same as DC sensor supply M.
 Logic circuit reference is the same as the input power supply M on a CPU with
DC power supply.
 CPU communication ports have the same reference as logic circuit.
 Analog inputs and outputs are not isolated from logic circuit. Analog inputs are
full differential to provide low voltage common mode rejection.
 Logic circuit is isolated from ground to 500 VAC.
 DC digital inputs and outputs are isolated from logic circuit to 500 VAC.
 DC digital I/O groups are isolated from each other by 500 VAC.
 Relay outputs are isolated from logic circuit to 1,500 VAC.
 Relay output groups are isolated from each other by 1,500 VAC.
 AC power supply line and neutral are isolated from ground, the logic circuit, and
all I/O to 1,500 VAC.
Using the Optional Field Wiring Connector with Units without a Removable
Connector
The optional field wiring fan-out connector (Figure 2-8) allows for field wiring
connections to remain fixed when you remove and re-install the S7-200 unit. Refer
to Appendix E for the order number of the fan-out connector.
Field Wiring
Fan-Out Connector
Figure 2-8 Optional Field Wiring Connector