Safety relay module SRM 21 Multi

Features/Options

  • Enclosure width: 22.5 mm
  • 2 NC contact combination connectable
  • Feedback circuit
  • 2 enabling paths potential-free
  • 1 auxiliary output
  • Manual or automatic start
  • LED indicator for switching condition
  • PL e, SIL CL 3

Technical data

StandardsEN ISO 13849-1, EN 62061,
EN 574, EN 60947-5-1
EnclosurePolyamid PA 6.6 V0 black;
DIN rail mounting
per EN 50022
Contact materialAgNi 10 + 0.2 µm Au
MountingDIN rail mounting
Connectionscrew connection terminals
Cable cross-sectionmin. 1x 0.5 mm² (AWG 20)
including conductor ferrules,
max. 1x 2.5 mm² (AWG 14) including conductor ferrules,
2x 1.5 mm² (AWG 16) including conductor ferrules
Degree of protectionEnclosure IP 40, Terminal block
IP 20 to IEC/EN 60529,
shock protection to VBG 4
 
Safety-relevant data:*
EN 60204-1stop category 0
EN 61508SIL CL 3
PFH2.2 x 10-9
PFD4.64 x 10-6
EN ISO 13849-1PL e, Category 4
TMmax. 20 years
MTTFd> 100 years
DC/DCavg> 99 %
 
Rated operating voltage Ue24 VDC -20 % ... +25 %
Rated operating current Ie0.125 A
Rated operating isolation voltage Ui250 VAC
Rated impulse withstand voltage Uimp4 kV
Inputs2 NC contacts, 1 feedback input,
1 start input
Outputs2 enabling paths, 1 auxiliary output
Ie/Ue enabling paths3 A/230 VAC; 5 A/24 VDC
Utilisation categoryAC-15; DC-13
Contact load capacity5 mA … 6 A; 5 V ... 250 VAC/DC
Typ. input current/
voltage
8 mA/ 24 VDC
Short-circuit current Ikpower supply 2A slow blow
enabling paths 6 A gG/gN fuse
Delay on energisation/ deenergisation≤125 ms
Risk time≤ 0.5 s (switch-on delay)
Simultaneity of
input circuits
< 0.5 s with two-hand control circuit
Mechanical life> 10 million operations
Display2 LEDs for inputs, 2 LEDs for outputs,
1 LED for supply voltage, 1 LED for fault
Degree of pollution2
Overvoltage categoryIII
Ambient temperature–25 °C … +55 °C
Storage and shipping temperature–25 °C … +75 °C
Shock resistance10 g
Approvals
NoteInductive loads (contactors, relays etc.) are to be suppressed by suitable circuitry.
Weight120 g
Ordering details
Type code
Type   Material no.
Safety relay module SRM 21 Multi 1185607