Safety relay module SRM 21 RT2

General 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 IP40, terminal block IP20 to IEC/EN 60529, protection against contact to VBG 4

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 U_e

24 VDC ±15 %

Rated operating current I_e

0.125 A

Rated insulation voltage U_i

250 VAC

Rated impulse withstand voltage U_imp

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 I_e/U_e

to EN 60947-5-1: 2 A/230 VAC; 1 A/24 VDC
to CSA: B300/R300, 250 VAC

Conventional thermal current I_the

5 A

Utilisation category

AC-15; DC-13

Contact load capacity

min. 10 mA

Typ. input voltage

20 VDC

Typ. input current

22 mA

Max. load of signalling output

20 mA

Short-circuit protection

power supply 2A slow blow, enabling paths 6 A gG/gN fuse

Pick-up delay

≤ 20 ms

Drop-out delay

≤ 20 ms

Risk time

≤ 0.5 s (switch-on delay)

Attendance delay t_v

< 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

ß d

Note

Inductive loads (contactors, relays etc.) are to be suppressed by suitable circuitry.

Weight

220 g

Safety-relevant data

EN ISO 13849-1

Performance Level PL e

Category

4

T_M

max. 20 years

MTTF_d

> 113 years

DC/DC_avg

> 99 %

EN 62061

SIL CL 3

PFH_d

3 x 10^-8 1/h

h_op

8 h/day

d_op

220 days/year

t_zyklus

30 s

EN 60204-1

stop category 0

Note

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 n_op, the safety-related data vary from the given data and can be provided on request.