Hitachi SJ Series Safety Function Manual page 18

Chapter 4
4.4.2
How to connect STO signals
Please refer to the wiring examples below for wirings on
terminals.
■Wiring
e.g. Internal power supply + Source logic
S12 S12
S11 S11
24V1 24V2
CMo1 CMo2
S13 S13
24V3 24V4
CMo3 CMo4
S3 S3
S2 S2
S1 S1
RLS CME
P24E STC
ST1 ST2
ST2 STC ST1
P24S STC CMS
Short wire
*) Please connect between STC and CMS.
Terminal block of SJ-P1
: Current flow
4-4
4.4.3
Input terminal
Input signals of Safety function are redundant inputs of
terminal group -1 and terminal group -2.
When voltage is applied to each input, currents flow on
each safety path inactivating the Safety function.
When voltage is removed from at least one of the
redundant inputs, the Safety function is activated by the
corresponding safety path.
The voltage source for input signals of safety function is
selectable from the 24V power supply for input terminals
(P24E) or an externally prepared DC24V power supply.
The external power supply must be SELV or PELV DC24V
power supply.
An example of wiring the switch to input S1-1 and S1-2 is
shown below.
■In case of use of the 24V power supply for input
terminals (P24E)
S12 S12
S11 S11
24V1 24V2
CMo1 CMo2
S13 S13
24V3 24V4
CMo3 CMo4
S3 S3
S2 S2
S1 S1
RLS CME
P24E STC
ST1 ST2
■Selecting input terminal function
It can be set the input terminal function.
No. Name
Safety Function
0-11
Select Input 1
Safety Function
0-12
Select Input 2
Safety Function
0-13
Select Input 3
■NO/NC switching function
NO/NC state can be switched only path 2.
No. Name
0-31 Input arrangement 1
0-32 Input arrangement 2
0-33 Input arrangement 3
Safety Function
Related data
00:Invalid/01:STO-A/02:SS1-A/
03:SBC-A/04:SLS-A/05:SDI-A/
11:STO-B/12:SS1-B/13:SBC-B/
14:SLS-B/15:SDI-B
Related data
00:NC(path 1 and path 2) /
01:NC(path 1) and NO(path2)