Safety relay module SRM 21 RT2

Safety relay module
Material number: 1179203
(Material number old: 90560049)
  • Enclosure width: 22.5 mm
  • 2 NC or 1 NC/1 NO contact can be connected
  • Feedback circuit
  • 2 enabling paths
  • 1 transistor output
  • Manual or automatic reset
  • LED indicator for switching condition
  • Crossed wire monitoring
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Technical data

Applied standards EN ISO 13849-1, EN 62061, EN 60204-1, BG-GS-ET-20, EN 60947-5-1, EN 60947-5-3, EN 61326-3-1
Enclosure polycarbonate, black
Tightening torque screw connection terminals: approx. 0.8 Nm
Degree of protection enclosure IP 40, terminal block IP 20 to IEC/EN 60529, protection against contact to VBG 4
Safety-relevant data:
EN ISO 13849-1 Performance Level PL e
Category 4
TM max. 20 years
MTTFd > 113 years
DC/DCavg > 99 %
EN 62061 SIL CL 3
PFHd 3 x 10-8 1/h
hop 8 h/day
dop 220 days/year
tzyklus 30 s
EN 60204-1 stop category 0
Contact material Silver, gold flashed
Mounting DIN rail mounting
Connection screw connection terminals with + and - screws
Cable cross-section min. 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
Rated operating voltage Ue 24 VDC ±15 %
Rated operating current Ie 0.125 A
Rated operating isolation voltage Ui 250 VAC
Rated impulse withstand voltage Uimp 4 kV
Conditional short-circuit current 100 A
Inputs 1 NC/1 NO contact or 2 NC contacts, 1 feedback circuit, 1 start input (monitored)
Outputs 2 enabling paths, 1 transistor output as signalling output
Rated operating current/voltage Ie/Ue to EN 60947-5-1: 2 A/230 VAC; 1 A/24 VDC
to CSA: B300/R300, 250 VAC
Conventional thermal current Ithe 5 A
Utilisation category AC-15; DC-13
Contact load capacity min. 10 mA
Typ. input voltage 20 VDC
Max. load of signalling output 20 mA
Short-circuit protection power supply 2A slow blow, enabling paths 6 A gG/gN fuse
Delay on energisation/ deenergisation ≤ 20 ms
Risk time ≤ 0.5 s (switch-on delay)
Attendance delay tv < 200 ms
Mechanical life > 50 million operations
Display 1 LED for supply voltage, 1 LED each for input A and B, 1 LED for authorisation
Degree of pollution 2
Overvoltage category III
Ambient temperature –22 °C … +55 °C
Storage and shipping temperature –22 °C … +70 °C
Relative humidity 10 % ... 90 %
Shock resistance 15 g
Approvals
Note Inductive loads (contactors, relays etc.) are to be suppressed by suitable circuitry.
The safety-related data are based on a load of 24 V / 1 A / DC-1 for the enabling paths. With higher load currents for the enabling paths and other requirement rates nop, the safety-related data vary from the given data and can be provided on request.
Typ. input current 22 mA
Weight 220 g