Banner SMI30 —Intrinsically Safe User Manual

SMI30 Series Intrinsically Safe Sensors

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Rugged, NEMA 6P-plus sensors in 30 mm threaded PBT barrel housings

• Designed for use with approved amplifiers and intrinsically safe barriers in explosive
environments

• Very high excess gain; 350 foot range (standard 10 ms models)

• Fast 1 ms response models (152 foot range) available by special order

• Totally sealed, self-contained, intrinsically safe threaded-barrel opposed mode sensor
pairs in rugged 30 mm PBT housings

• Highly immune to noise: the best noise immunity of any self-contained emitter/receiver
pair

• Internal alignment indicator LED may be viewed either from the side or from the front
of the receiver through the lens

• Integral mini-type 3-pin "QD" (quick-disconnect) connector

Models

Response Time

Models with 10 ms re­sponse time

Models with 1 ms re­sponse time

WARNING: Not To Be Used for Personnel Protection
Never use this device as a sensing device for personnel protection. Doing so could lead to serious
injury or death. This device does NOT include the self-checking redundant circuitry necessary to allow its

use in personnel safety applications. A sensor failure or malfunction can cause either an energized or de­energized sensor output condition.

Frequency "A" (stand­ard)

Repeatability: 1 ms Repeatability: 1.6 ms Repeatability: 2.3 ms

Emitters SMI306EQ SMI306EBQ SMI306ECQ

Receivers (light operate) SMI30AN6RQ SMI30AN6RBQ SMI30AN6RCQ

Receivers (dark operate) SMI30RN6RQ SMI30RN6RBQ SMI30RN6RCQ

Repeatability: 360 µs Repeatability: 210 µs

Emitters SMI306EYQ SMI306EYCQ

Receivers (light operate) SMI30AN6RYQ SMI30AN6RYCQ

Receivers (dark operate) SMI30RN6RYQ SMI30RN6RYCQ

Frequency "B" (special
order)

Frequency "C" (special
order)

Overview

Banner SMI30 Series intrinsically safe barrel sensors are extremely rugged and powerful opposed mode infrared sensor pairs designed
for the most demanding industrial applications. Their high excess gain (350 foot range) provides enough sensing power to penetrate the
heaviest contamination (see Excess Gain Curve). Electronics are fully epoxy-encapsulated for maximum resistance to mechanical shock
and vibration. Positive sealing at both ends, with no exposed epoxy interfaces, eliminates all leak paths (including capillary leakage).
Construction exceeds NEMA 6P (IEC IP 67) standards. Sensors are approximately 1.2 inches in diameter by 4 inches long.

SMI30 series dc receivers operate from 10 to 30V dc. These sensors carry entity approval from Factory Mutual Research and CSA for
intrinsically safe operation in hazardous atmospheres. SMI30 Series sensors are certified as being intrinsically safe when used with ap­proved intrinsic safety barriers. SMI30 Series sensors are suitable for intrinsically safe use in hazardous locations as defined by Article
500 of the National Electrical Code (see classifications, above right). SMI30 Series sensors are also certified by Factory Mutual and CSA
as non-incendive devices when used in Division 2 locations (except Groups E and F) without intrinsic safety barriers.

SMI30 Series sensors may be wired for either two- or three-wire current-sinking operation. In the three-wire hookup, which requires two
intrinsic-safety barriers (or one dual barrier), the sink current is 15 mA. The two-wire hookup, which requires one barrier, sinks ≤ 10 mA
(OFF state) and ≥ 20 mA (ON state).

P/N 035331 Rev. E 4/4/2013

SMI30 Series Intrinsically Safe Sensors

Intrinsic safety barriers are available from Banner. Current trip point amplifier CI3RC2 is also offered. Several mounting brackets are
available.

SMI30 Series receivers have a red LED alignment indicator that lights whenever the receiver "sees" its modulated light source. Emitters
have a red LED to indicate "power on". All LED indicators are mounted internally to preserve the waterproof integrity of the sensor hous­ing, and are visible from both the side and front of the sensor through the sensor's quad-ring sealed acrylic lens.

The innovative circuitry used in SMI30 Series emitters and receivers provides the best noise immunity of any self-contained opposed
mode sensor pair. For applications where optical crosstalk between sensors might be a problem, SMI30 Series emitters and receivers
are available with a choice of three modulation frequencies (frequency "A", frequency "B", or frequency "C"). This makes it possible to
use high-powered sensor pairs of different frequencies in close proximity to each other without crosstalk. (NOTE: frequency "A" is stand­ard; frequencies "B" and "C" are available by special order. An emitter and its receiver must be of the same modulation frequency.) See
the models table for a summary of models.

Each unit is supplied with two hexagonal jam nuts. A 30 mm clearance hole is required for mounting, and mounting bracket models
SMB30MM, SMB30S, and SMB30C are available. All models have a built-in standard quick-disconnect ("QD") connector. "QD" models
mate with 12-foot long model SMICC-312 or 30-foot long model SMICC-330 mini-type QD cable (sold separately from sensor).

Design Standards

ATEX (European) EN 60079-0, EN 60079-11, EN 60079-26

Canadian CAN/CSA C22.2 No. 0-M91, No. 142-M1987, No.157-92, No. 1010.1, E60079-0, E60079-11

United States FM Class 3600, 3610, and 3810, ANSI/ISA 61010-1 (82.02.01), ANSI/ISA 60079-0, 60079-11, and 60079-26

Wiring Information

SMI30 Series sensors are certified intrinsically safe ONLY when used with certified energy-limiting intrinsically safe barriers. Emitter units
use a two-wire hookup (there is no output connection). Note from the wiring/hookup diagram that the receiver installation may be made
using either a single barrier (2-wire hookup) or with a dual channel barrier (3-wire hookup). In the 2-wire configuration, the sensor acts as
a current sink, drawing less than 10 mA in the OFF state and more than 20 mA in the ON state. The customer must provide a current
sensing device ("current sensor" in the diagram) to convert the current to a logic level. SMI30 Series sensors may be used with Banner
Current Amplifier Control Module CI3RC2.

The CI3RC2 module may be purchased (with model RS-11 module socket, one dual-channel barrier, and DIN rail barrier mounts inclu­ded) by specifying kit model CI2BK-2. One dual-channel intrinsic barrier (alone) may be ordered by specifying model CI2B-1. See Acces-

sories on page 6.

In the 3-wire configuration, the output may be used directly to control loads of less than 15 mA.

In selecting the barrier, it is important to consider the barrier's resistance. The sensors must have at least 10 volts across the brown and
blue power leads for proper operation, and the barrier will cause a voltage drop due to its resistance. The formula that determines how
much resistance is allowed is: R = 40 (supply voltage – 10 volts).

If the supply voltage is 24V dc, then the maximum resistance is 560 ohms. If the supply voltage is 18V dc, then the maximum resistance
is 320 ohms. This includes the resistance of any current sensing device used (in the 2-wire configuration), so the barrier resistance must
be further reduced by the current sensor resistance.

Note that, in the 3-wire hookup, the barrier is in series with the load. This results in an apparent saturation voltage of the output that is
higher than the sensor output by the amount of IxR (current times voltage) drop through the barrier.

Emitters use the 2-wire hookup; receivers use either 2- or 3-wire hookup. Review to the models table for a summary of models.

Barriers are generally classified as either "positive input" or "negative input". SMI30 Series intrinsically safe sensors require "positive
input" barriers for both supply and load. The blue (negative supply) lead of the sensor is normally connected to the ground terminal of the
barrier.

The user of this equipment is responsible for proper installation and maintenance of the equipment, and must conform with the certifica­tion requirements relating to barriers and to maximum allowable capacitance and inductance of the field wiring. If you are in doubt about
these requirements, our applications engineers can refer you to the appropriate authority.

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SMI30 Series Intrinsically Safe Sensors

MAXI-AMP CI3RC2 Current Amplifier Module

Banner MAXI-AMP module model CI3RC2 (part number 36606) is a self-contained module that converts the current output signal of an
SMI30 Series sensor to a trip point switch.

Hookup Using Two Single-Channel Barriers

P/N 035331 Rev. E www.bannerengineering.com - tel: [phone]