R. STAHL 9176A Galvanic Isolator

Loop-powered binary output for Ex i field circuits

Article Number: 222182

Product Overview

The R. STAHL 9176A series galvanic isolators provide binary signals for intrinsically safe operation of Ex i solenoid valves, indicator lamps, or sirens. These devices are powered by the control circuit, eliminating the need for a separate auxiliary power supply. The intrinsic safety outputs are electrically isolated from the inputs. Two-channel variants feature electrical channel separation.

Suitable for solenoid valves and signaling devices.
Two-channel variants reduce space requirements.
No separate auxiliary power supply required.

Technical Characteristics

Explosion Protection

Application Domain (Zones)	0, 1, 2, 20, 21, 22
Interface Ex Zone	IECEx BVS 13.0012 X
IECEx Protection Against Explosion of Gas	Ex nA [ia Ga] IIC T4 Gc
IECEx Protection Against Explosion of Dust	[Ex ia Da] IIIC
ATEX Gas Certificate	BVS 04 ATEX E 075 X
ATEX Protection Against Explosion of Gas	II 3 (1) G Ex nA [ia Ga] IIC T4 Gc
ATEX Dust Certificate	BVS 04 ATEX E 075 X
ATEX Protection Against Explosion of Dust	II (1) D [Ex ia Da] IIIC
FM16US0122X	FM16US0122X
FM16CA0067X	FM16CA0067X
cFMus Marking	Class I, Div. 2, Groups A,B,C,D; Class I, Zone 2, Group IIC AIS Class I,II,III, Div. 1, Groups A,B,C,D,E,F,G; Class I, Zone 0, [AEx ia]/[Ex ia] IIC T4 Mounting vert. at Ta = 70°C, or horizontal Ta = 60°C

Certifications

ATEX (BVS) Brazil (ULB) Canada (FM) China (NEPSI) Korea (KTL) USA (FM) IECEx (BVS) SIL (exida)

Marine Approval: CCS, EU RO MR (DNV)

Conformity Certificate: ATEX (EUK), China (CCC)

Safety Values

Maximum Voltage Uo	27.6 V
Maximum Current Io (Ex ia)	110 mA
Maximum Current Io (Ex ib)	50 mA
Maximum Power Po	760 mW
Max. External Capacitance Co for IIC	0.085 μF
Max. External Inductance Lo for IIC	1.2 mH
Max. External Capacitance Co for IIB	0.667 μF
Max. External Inductance Lo for IIB	9 mH
Internal Capacitance	1.1 nF
Internal Inductance	Negligible
Max. Voltage Uo Parallel	27.6 V
Max. Current Io (Ex ia) Parallel	220 mA
Maximum Technical Safety Voltage	253 V

Electrical Characteristics

Number of Channels	1
Auxiliary Power	None
Auxiliary Power Consumption	0.5 W + (I x 37 mW/mA)
Reverse Polarity Protection	Yes

Electrical Isolation

Test Voltage According to Standard	EN IEC 60079-11
Test Voltage According to Standard	EN 50178
Input to Input	350 V AC

Input

Input Voltage for SWITCH ON	18-31.2 V
Input Voltage for SWITCH OFF	0-5 V
Control Power PE	0.5 W + (I x 37 mW / mA) (with IA = required max. output current)

Output

Output Voltage Under No Load U	25 V
Maximum Output Current Io	35 mA
Output Internal Resistance R	250 Ω
Output Residual Ripple	< 100 mV
Output Switching Frequency	≤ 10 Hz
Switching Delay SWITCH ON/OFF	≤ 50 ms
Switching Delay SWITCH OFF/ON	≤ 18 ms
Switching Status Indication	Yellow LED "OUT"

Environmental Conditions

Ambient Temperature (Single Device)	-20 °C ... 70 °C (-4 °F ... +158 °F)
Ambient Temperature (Group Mounting)	-20 °C ... 60 °C (-4 °F ... +140 °F)
Storage Temperature	-40 °C ... 80 °C (-40 °F ... +176 °F)
Maximum Relative Humidity	950%
Usage at Altitude	< 2000 m
Electromagnetic Compatibility	Complies with standards and directives: EN 61326-1, industrial sector use; NAMUR NE 21

Mechanical Characteristics

Degree of Protection (IP)	IP30
Degree of Protection (IP) Pins	IP20
Fire Resistance (UL 94)	V0
Housing Material	Polyamide
Pitch	17.6 mm (0.69 in)
Width	17.6 mm (0.69 in)
Height	114.5 mm (4.51 in)
Length	108 mm (4.25 in)
Weight	170 g (0.37 lb)

Mounting / Installation

Mounting Type	DIN Rail NS35/15, NS35/7.5
Mounting Position	Horizontal, Vertical
Connection Type	Screw terminal
Solid Conductor Cross-Section Minimum	0.2 mm²
Solid Conductor Cross-Section Maximum	2.5 mm²
Flexible Conductor Cross-Section Minimum	0.2 mm²
Flexible Conductor Cross-Section Maximum	2.5 mm²
AWG Connection Cross-Section	24 ... 14

Accessories

Transparent Cover

For ISpac 91xx modules, yellow, transparent. Precise device marking for SIL applications. (Packaging unit: 10 pieces)

200914

Spare Parts

Screw Terminal

3-pole plug, screw connection	M3 thread, stripping length: 7 mm, Color: Green	112817
3-pole plug, screw connection	M3 thread, stripping length: 7 mm, Color: Black	112816
3-pole plug, screw connection	M3 thread, stripping length: 7 mm, Color: Blue	112818

Screw Terminal with Control Tap

3-pole plug with control tap, screw connection	M3 thread, stripping length: 7 mm, Color: Black	113005
3-pole plug with control tap, screw connection	M3 thread, stripping length: 7 mm, Color: Blue	113004

Spring Clamp Terminal

3-pole plug with control tap, spring clamp terminal	Stripping length: 10 mm, Color: Green	112825
3-pole plug with control tap, spring clamp terminal	Stripping length: 10 mm, Color: Black	112824
3-pole plug with control tap, spring clamp terminal	Stripping length: 10 mm, Color: Blue	112826

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