NORSTAT Safety Relays - Manual (Page 26)

Two hand control relays
DEVICE SAFE CZ
Two hand control relay
APPLICATIONS for type IIIc or II
APPROVALS CE, (TÜV, UL, C-UL pending)
CONTACTS 4 OSSD
LED indicators for status and supply diagnostic
SPECIAL CHARACTERISTICS wearless contacts, "AND" function between several SAFE C possible,
automatic start possible
LED Power, channel 1 and channel 2
24 V DC ( + 25 - 20 % )
OPERATING VOLTAGE Overvoltage protection
POWER CONSUMPTION ca. 3 W
START UP DELAY / FALLBACK TIME < 100 ms / < 25 ms
CONTACT CAPACITY max. total current bis 1,8 A
CONTACT CAPACITY min. at 24V DC (*) infinite
SIMULTANEITY 0,5 s
ENVIRONMENTAL TEMPERATURE -25°C to +55°C
SWITCHING CAPACITY to 43 W
CONTACT SECURITY short circuit proof
OPERATING MODE
(*) We offer all devices who have a CONTACT
CAPACITY of min. 100 mA at 24 V DC with
hard gold-plated contacts. In this way the
CONTACT CAPACITY of min. 100 mA is only 4 mA.
Please ask our sales team!
CONNECTION DIAGRAM
In use of the application below the simultaneousness of both switches is
monitored (less than 0,5 s). This behaviour corresponds to EN 954-1 safety
category 4.
This application is suitable for type II of DIN EN 574 and corresponds to EN
954-1 safety category 3.
Wiring changes during operation are not allowed and lead to a failure
message.
Application corresponds to EN 954-1 type IIIc and safety category 4, EN
IEC 62061 up to SIL3 and EN ISO 13849-1 up to PLe.
S35 S34 S22 S12 S11 S21 S21 S33 S32
S36 S37 A2 14 34 44 24 A1
0 V DC +24 V DC
Rückführung/
feedback control
loop
FUNCTION CIRCUIT DIAGRAM
A1 A2
Power Input circuits
S12 S22 S34 S35 S36
Output
circuits
Combination
circuit
S11 S21 S33
MCU1
<Controller 1>
MCU2
<Controller 2> Saf
et y o
ut pu
t ci
rc ui ts
14
24
34
44
S32 S37
Certifications according to
Safety relevant substance data
Depending on wiring (only max. values are given)
EN ISO 13849-1/ EN 61508: PLe, Cat. 4 / SIL3
MTTFd: 163 years / high, DC: high, CCF: achieved
PFH: 2,87*10 -9 1 /
h
, PFD: 2,01*10 -6 1 /
h,
SFF: 0,9573
NORSTAT INC. 300 Roundhill Dr. Rockaway, NJ 07866 Tel: 973-586-2500 Fax: 973-586-1590 www.norstat.com