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R. Stahl 9170/20-11-11 two-channel Ex i switching repeater, NAMUR input, normally open relay output 125 V / 1 A per channel, 24 V DC supply, DIN rail.
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| MFR / Brand | Stahl |
|---|---|
| MPN | 9170/20-11-11 |
| Model | 9170/20-11-11 |
| Type | Isolator |
|---|---|
| Additional Attributes | Channels: 2; Input: NAMUR EN 60947-5-6; Output: normally open signal relay 125 V / 1 A, 25 W / 50 VA; Supply: 24 V DC, 18-31.2 V, 55 mA, 1.3 W; Line fault detection; SIL 2 (relay); IP30; Ambient -20 to +60 C; ATEX II (1) GD [EEx ia] IIC, II 3 G EEx nAC II T4 |
| Item Weight | 160 g (0.35 lb) |
| Base Number | 9170 |
| Industry Terms | switching amplifier; Ex i isolator; intrinsically safe barrier; NAMUR isolating switch amplifier; IS relay; galvanic isolator |
| Common Misspellings | Stal 9170; R.Stahl 9170 20 11 11; switch repeater; 9170/20-11-12; swiching repeater |
| Application Types | Hazardous area proximity sensor and contact interfacing; oil and gas; chemical plant; marine; tank farms |
| Mpn Variants | 9170/20-11-11; 9170201111; 9170-20-11-11; 9170/20-11-11s; 9170/20-11-11k |
| Compatible With Replaces | Order codes 9170/20-11-11s (screw terminals), 9170/20-11-11k (spring clamp); AC-supply version 9170/20-11-21 |
| Series | 9170 |
| Nominal Rated Input Voltage | 24 V DC (18 to 31.2 V) |
| Mounting Type | DIN rail NS35 or pac-Carrier |
What this part is:
The R. Stahl 9170/20-11-11 is a 2-channel switching repeater from the Series 9170 Ex i isolators. It operates intrinsically safe contacts, NAMUR proximity switches and optocoupler outputs in the hazardous area and passes each signal to a normally open signal relay contact on the safe side. Channels: 2. Power Supply: 24 V DC. Output per Channel: Normally open signal relay, 125 V / 1 A.
Decoding the designation:
9170 — R. Stahl Series 9170 switching repeater, Ex i field circuit.
20 — 2-channel version.
11 — normally open signal relay output, 125 V / 1 A.
11 — 24 V DC power supply.
What these specs mean in practice:
Input Signal: NAMUR per EN 60947-5-6, ON ≥ 2.1 mA, OFF ≤ 1.2 mA. Supply Voltage Range: 18 to 31.2 V DC. Nominal Current: 55 mA for 2 channels. Power Consumption: 1.3 W. Relay Maximum Load: 125 V / 1 A AC or DC, 25 W / 50 VA. Relay Switching Frequency: 15 Hz maximum. Line Fault Detection: open and short circuit, with LED and fault contact, can be switched off. Output Inversion: selectable. Galvanic Isolation: input, output and supply; channels isolated from each other. SIL: up to SIL 2 with relay output (IEC 61508).
Explosion Protection: ATEX II (1) GD [EEx ia] IIC/IIB and II 3 G EEx nAC II T4, certificate DMT 02 ATEX E 195 X. Installation: Zone 2, Division 2 and safe area.
Mounting data:
Mounting: DIN rail NS35/15 or NS35/7.5, or pac-Carrier. Enclosure: IP30, PA 6.6. Terminals: IP20. Item Weight: approx. 160 g. Ambient Temperature: -20 to +60 °C. Storage Temperature: -40 to +80 °C.
Interchange guidance:
Current order codes add a terminal suffix: 9170/20-11-11s screw terminals, 9170/20-11-11k spring clamp terminals. 9170/20-11-21 is the same function on a 120 to 230 V AC supply.
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A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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