130 Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019
Chapter 7 Module Overview and Specifications
T9451 Digital Output Module Specification
Table 31 - Digital Output Module Specification
1
SIL 3 is the maximum achievable for a single channel. Selected CPU, input
and output voting configurations could increase or decrease the correct SIL
achieved. Refer to the Safety Manual for more details.
Attribute Value
Functional Characteristics
Output channels 8
Performance Characteristics
Safety integrity level IEC 61508 SIL 3
1
Safety level degradation 1oo1D, 1oo2D
Self-test interval <30 minutes (30s for each module)
Electrical Characteristics
Module supply voltage:
Voltage Redundant +24 Vdc nominal;
18 Vdc to 32 Vdc
Module supply power dissipation 3.0 W (10.2 BTU/hr.)
Output Voltage:
Maximum voltage without damage –1 V to +60 Vdc
Operating field supply voltage 18 Vdc to 32 Vdc
Maximum Field Voltage Slew Rate 150 V/s [
2
,
3
]
Output current: 1 A continuous for each channel
Minimum current required for line monitoring 10 mA for each module (20 mA for dual pair)
Maximum voltage drop 1 Vdc
Maximum current at de-rated temperature
De-rated current at maximum temperature
8 A all channels @ 60 °C
6 A all channels @ 70 °C
Maximum De-energised Output Voltage Slew Rate 12 V/ms
4
Maximum Energised Output Current Slew Rate 0.9 A/ms
4
Output off resistance (effective leakage) 50 KΩ
Voltage monitoring accuracy ± 0.5 V
Current monitoring accuracy ± 10 mA
Output overload protection
Surge 2 A for up to 50 ms
Continuous 1.5 A
Maximum field loop power dissipation 0.57 W for each field loop (1.94 BTU/hr.)
Mechanical Specification
Dimensions (height × width × depth) 166 mm × 42 mm × 118 mm
(6-½ in. × 1-21/32 in. × 4-21/32 in.)
Weight 340 g (12 oz.)
Casing Plastic, non flammable
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