Safety relay module SRM 21 Multi

  • Enclosure width: 22.5 mm
  • 2 NC or 2 change-over contacts can be connected
  • 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

Applied standardsEN ISO 13849-1, EN 62061,
EN 574, EN 60947-5-1
EnclosurePA66, self-extinguishing UL 94 V-0
Contact materialSilver, gold flashed
MountingDIN rail mounting
Connectionscrew connection terminals
Cable cross-section0.2 ... 1.5 mm² (incl. conductor ferrules)
Degree of protectionenclosure and terminals IP 20 to IEC 60529, protection against contact to VBG 4
 
Safety-relevant data:
EN 62061SIL CL 3
PFH2.15 x 10-9 1/h
SFF0.9465
EN ISO 13849-1Performance Level PL e
Category4
TMmax. 20 years
MTTFd100 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 inputs, 1 feedback circuit, 1 start input (monitored)
Outputs2 enabling paths, 1 transistor output as signalling output
Rated operating current/voltage Ie/Ueenabling paths: 3 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
Max. load of
output circuits
50 mA (short-circuit-proof)
Conditional short-circuit current1000 A
Max. fuse ratingsupply voltage: 2 A slow blow; enabling paths: 6,3 A qick-acting; 4 A slow blow
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   Material no.  
Type    Material no.   
Safety relay module SRM 21 Multi stock type Standard versions, in stock or available at short notice 1185607
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.