8.8 EM 2/4F‑DI 1/2F‑RO
Technical data of the expansion module 2/4F‑DI 1/2F‑RO
Device data
Number of sensor inputs (1-channel), safety-related 4
Number of test outputs 2
Number of outputs 2 safety-related single-channel relay outputs
Height
• Screw terminals
• Spring-loaded terminals
102 mm
105 mm
Width 22.5 mm
Depth 124 mm
Weight 160 g
Electrical data
Supply voltage/
rated control supply voltage Us
24 V DC
Operating range 0.85 to 1.15 x Us
Rated insulation voltage U
i
300 V
Rated impulse withstand voltage U
imp
2.5 kV
1)
Total power consumption 85 mA
Rated power at Us 2.0 W
Utilization category in accordance with EN 60947‑5‑1
(relay outputs)
• AC 15 at 230 V
• DC 13 at 24 V
2 A
1 A
Resetting time
2)
of the safety-related outputs t
RT
420 ms
Mechanical durability 10 x 10
6
switching cycles
Max. switching frequency z at rated operational current 1000 1/h
Conventional thermal current I
th
2 A
Output contacts protected with fuses NH type 3NA, DI‐
AZED type 5SB, NEOZED type 5SE
• Operating class gL/gG
• Operating class quick response
4 A
6 A
Safety data according to EN ISO 13849-1
Probability of a dangerous failure per hour (PFH
d
) 3.79 x 10
-9
1/h
Probability of a dangerous failure on demand (PFD) 5.85 x 10
-6
Characteristic values for cables
Max. permissible cable resistance 100 Ω
Max. permissible cable length from device to sensor
(for CU 1.5 mm
2
and 150 nF/km)
1000 m
Max. permissible cable capacitance 330 nF
1)
Protective separation, reinforced insulation 4 kV between input circuit and output contact current paths.
Technical data
8.8 EM 2/4F‑DI 1/2F‑RO
SIRIUS 3RK3 Modular Safety System
376 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006
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