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BOSCH DS150i Series - Request-to-exit Detectors
The DS150i Series consists of the DS150i Detector (light gray) and the DS151i Detector (black). They are specifically designed for Request-to-exit (REX) applications. The DS150i and DS151i detect motion in their coverage area and signal an access control system or door control device.
Single or double door use
Wall or ceiling mountable
Internal vertical pointability
Wrap-around coverage pattern
Selectable relay trigger mode
Selectable fail safe/fail secure modes
Technical specifications
Electrical
- Current Draw: 26 mA at 12 VDC
- Voltage: 12 VAC or VDC; 24 VAC or VDC
Mechanical
- Alarm Output: Two Form C relay contacts
- Indicators: One activation LED
- Relay Latch Time: Adjustable to 60 sec
- Enclosure Dimensions: 3.8 cm x 15.9 cm x 3.8 cm (1.5 in. x 6.25 in. x 1.5 in.)
- Enclosure Material:
- High impact ABS plastic enclosure
- Power Loss Default Mode:
- Programmable fail-safe or fail-secure modes.
- Timer Mode: Programmable reset (accumulative) or non-reset (counting) mode.
- Mounting Location: Surface mount on wall or ceiling
Environmental
- Operating Temperature: -29°C to +49°C (-20°F to +120°F)
- Radio Frequency Interference (RFI)
- Immunity: No alarm or setup on critical frequencies in the range from 26 MHz to 1000 MHz at 50 V/m.
Manufacturer Resources
Product Specs
- Series:
- DS150i
- Subcategory:
- Motion Sensors
- Commercial/Residential:
- Commercial
- Temperature Range:
- -29°C to +49°C (-20°F to +120°F)
- Product Type:
- Motion Sensors
- Product Group:
- Electronic Access Controls
- Product Subgroup:
- Sensors, Switches, Relays and Timers
- Product Voltage:
- 12/24 VAC/VDC
- Product Finish:
- Black
- Product Category:
- Electronic Access Controls
- Department:
- Plumbing
BOSCH DS150I – Frequently Asked Questions
1) Will the Bosch DS150i request-to-exit sensor run on my 12V access control power supply, or does it need 24V?
Either. The DS150i and DS151i run on 12 VAC/VDC or 24 VAC/VDC, so they tie into whatever supply is already feeding the strike or mag lock. Current draw is 26 mA at 12 VDC, which is low enough that adding one to an existing panel output rarely forces a bigger supply.
2) Does the Bosch DS150i unlock the door if power is lost, or keep it locked?
That's your choice at install. The DS150i is programmable for fail-safe or fail-secure on power loss, so the same detector suits a stairwell that must release and a secured storeroom that must not. Set it to match the lock and the code requirement for that opening before you close the housing.
3) Can one Bosch DS150i REX detector cover a pair of doors, or do I need one per leaf?
One unit handles a pair. The DS150i is rated for single or double door use and throws a wrap-around coverage pattern, with internal vertical pointability to aim the pattern down at the approach side rather than out into the room. For a double opening, mount it centered over the pair and tilt it in.
4) Can a Bosch DS150i drive both a mag lock and a door position alarm shunt at the same time?
Yes, it has two Form C relay contacts, so one set can break the mag lock power while the other shunts the alarm or signals the access panel. Relay latch time is adjustable up to 60 seconds, and the timer runs in either reset (accumulative) or non-reset (counting) mode, so you can hold the door released while a cart or a crowd clears rather than dropping the lock the instant motion stops.
5) Will a REX motion detector like the DS150i operate an automatic door, or is it only for unlocking?
Unlocking only. The DS150i signals an access control system or door control device that someone is exiting, so it releases the lock and shunts the alarm on a manually operated door. It will not activate a powered swing, slide, or fold operator, and it does not do presence detection to hold a door open. For automatic door activation and presence, that's a different sensor entirely, like the MS Sedco DH100-CT for sliding and folding doors, the DH-400 combination motion and presence sensor, or the MicroStar-M microwave activation sensor.
6) What request-to-exit sensor should be used when the mounting surface is a ceiling rather than the wall above the door?
The BOSCH DS150i is a surface mount unit that goes on either a wall or a ceiling, so a ceiling run does not require a different model - the enclosure is 1.5 in. x 6.25 in. x 1.5 in. and has internal vertical pointability to aim the pattern down at the approach. Where a purpose-built ceiling kit is preferred, the Locknetics EMS-100 exit motion sensor ships with ceiling and surface mount adapters. Both are exit motion sensors for signaling a door release on egress.
7) Is an MS Sedco DH-400 or DH100-CT a substitute for a BOSCH DS150i request-to-exit detector?
They are not the same job. The BOSCH DS150i is a request-to-exit detector - it senses motion in its coverage area and signals an access control system or door control device, with two Form C relay contacts and selectable fail safe or fail secure behavior on power loss. The MS Sedco DH-400 FRM-AI is a combination motion and presence sensor for automatic doors, and the DH100-CT FRM-AI is an activation and presence sensor for automatic sliding and folding doors. Those are automatic operator activation and safety sensors; on a swing door with an electric lock and an access control panel, the DS150i is the REX device.
8) How much wall space do I need above the door frame to mount a DS150i motion sensor?
The enclosure measures 3.8 cm x 15.9 cm x 3.8 cm (1.5 in. x 6.25 in. x 1.5 in.), so it takes a strip roughly six and a quarter inches long and an inch and a half across on the header. It surface mounts to wall or ceiling, no back box cut-in, which is what makes it workable on a hollow metal frame or a hard-lid ceiling where you cannot get behind the surface.
9) Will a Bosch DS150i hold up in an unheated parking garage or a loading dock vestibule?
Operating range is -29C to +49C (-20F to +120F), which covers an unconditioned garage, a dock vestibule, or a stair tower in most US climates. The enclosure is high impact ABS. It's a commercial-duty detector, not a residential one.
10) What is the difference between the Bosch DS150i and the DS151i?
Color, and that's it. The DS150i is light gray and the DS151i is black; both are the same request-to-exit detector with the same electrical and relay behavior. Pick gray to disappear against a painted header or an aluminum storefront frame, black against a dark anodized frame or a dark ceiling.
11) What else can I use if I need a request-to-exit sensor with a ceiling mount adapter or a white housing?
The DS150i surface mounts to a wall or ceiling as-is, in gray or black. If you need a mounting adapter kit, the Locknetics EMS-100 exit motion sensor ships with ceiling and surface mount adapters. If the header is painted white and you want the sensor to vanish, the Camden CM-RQE70 series comes in white or black housing and runs 12 to 24V. Other REX detectors worth pricing against it are the Alarm Controls SREX-100 infrared sensor with adjustable time delay, the Securitron XMS, and the Detex MN01 and MN02 dual-pyroelectric sensors.
12) Can I mount a DS150i near a two-way radio repeater or antenna without it false triggering?
RFI immunity is specified as no alarm or setup on critical frequencies from 26 MHz to 1000 MHz at 50 V/m, which covers the land mobile and paging bands that cause trouble in hospitals, campuses, and municipal buildings where staff carry portables. That matters on a REX head, because a false trigger unlocks a door.
13) What is the closest alternative to the BOSCH DS150i request-to-exit detector if a black housing is needed?
The BOSCH DS150i series already covers black - the DS150i is the light gray detector and the DS151i is the black one, so the series itself handles both housing colors. If a different brand is preferred in black, the Camden CM-RQE70 series request-to-exit motion sensor is offered in a white or black housing and runs on 12 to 24V, the same supply range as the DS150i at 12 VAC/VDC or 24 VAC/VDC. Both are infrared REX sensors intended to signal an access control system when someone approaches the door from the secure side.
14) Which exit sensor detects through a header or non-metallic surface instead of by infrared?
The BOSCH DS150i detects motion optically and needs a clear view of the approach area from its wall or ceiling mounting position. Where the sensing element has to work from a concealed position, the MS Sedco MicroStar-M is a microwave motion sensor with HPR for automatic door activation, and microwave is the different detection technology in the group. For a straight infrared REX on the secure side of a swing door, the DS150i and the Alarm Controls SREX-100 infrared motion sensor with adjustable time delay are the like-for-like choices - the DS150i relay latch time is adjustable to 60 seconds.
15) What is the difference between the BOSCH DS150i and the Alarm Controls SREX-100 request-to-exit sensor?
Both are infrared request-to-exit motion sensors with an adjustable time delay - the DS150i relay latch is adjustable to 60 seconds, and the SREX-100 is listed with an adjustable time delay. The DS150i adds two Form C relay contacts, a selectable relay trigger mode, programmable fail-safe or fail-secure behavior on power loss, and a reset (accumulative) or non-reset (counting) timer mode, and its wrap-around coverage pattern with internal vertical pointability covers single or double door openings. Where a second dry contact is needed for a shunt or a local alarm in addition to the lock release, the two Form C contacts on the DS150i are the reason to pick it.
16) What request-to-exit sensor works in an unheated garage or exterior vestibule?
The BOSCH DS150i is rated from -29 degrees C to +49 degrees C (-20 degrees F to +120 degrees F) in a high impact ABS enclosure, which covers unheated parking structures and vestibules in most climates. It also carries RFI immunity with no alarm or setup on critical frequencies from 26 MHz to 1000 MHz at 50 V/m, which matters where handheld radios are in use. Among the alternatives, the Detex MN01 and MN02 series passive infrared motion sensors use dual-pyroelectric detection, a second sensing element approach worth considering where the coverage area sees heat movement that is not a person.
17) Can one request-to-exit sensor cover a pair of doors, or is one needed per leaf?
The BOSCH DS150i is rated for single or double door use and has a wrap-around coverage pattern, so one detector can cover a pair opening rather than one per leaf, with internal vertical pointability to aim the pattern at the approach. Alternatives in the same role include the Securitron XMS request to exit motion sensor and the Locknetics EMS-100 exit motion sensor. Coverage on a pair depends on the header width and the mounting height, so confirm the pattern reaches both leaves before committing to a single unit.
18) Is the Securitron XMS interchangeable with the BOSCH DS150i on an existing REX circuit?
Both are request-to-exit motion sensors that release a door on approach from the secure side, so the role is the same. The BOSCH DS150i runs on 12 VAC or VDC or 24 VAC or VDC at 26 mA draw at 12 VDC and provides two Form C relay contacts, so it drops onto a REX circuit wired for either supply voltage and can serve both the lock release and a second contact. Verify the existing back box and wire run against the DS150i enclosure at 1.5 in. x 6.25 in. x 1.5 in., since the Securitron XMS and the BOSCH will not share a footprint.
19) How do I know the DS150i is seeing someone when I walk test it?
There's one activation LED on the unit. Walk the coverage pattern from the far edge inward and watch it light, then use the internal vertical pointability to tilt the pattern until it picks you up at the approach distance you want and not from the cross traffic beyond it. Two Form C contacts mean you can meter the relay at the same time to confirm the panel is seeing the transfer.
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Does the BOSCH DS150I come with a warranty?
Absolutely. The BOSCH DS150I is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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