Sennheiser SI 20 User Manual

SI20R/SZI30R

Front view of SI 30/SZI 30

Back view of SZI 30

SI 20-R/SZI 30R Two Channel IR Modulator & Remote Emitter

The SI 20-R two-channel, 95/250 kHz, wideband infrared modulator is a single rack-space unit that can drive up to eight SZI-30R emitter panels for up to 6,000 sq. ft. of coverage. This easy-to- use, integrated system offers a cost-effective solution for ADA compliance for the hard of hearing, simultaneous language interpretation, and other assistive listening applications. Each SZI30-R slave emitter panel floods an area of up to 750 sq. ft. (in mono mode), and can be remotely powered by the SI20-R. Several SZI-30R emitters can be clustered together at a single mounting point and aimed individually, using optional clamping accessories.

Features—Benefits

•Feeds DC power to eight SZI 30-R slave emitters for expanded coverage

•Switchable mono (Channel 1 or channel 2) or stereo operation, 95/250 kHz

•Up to 750 sq. ft. coverage using a single SZI-30R slave emitter

•Compatible with the SET100 personal listening system

•Two BNC connectors allow for expanded coverage using SZI 1029 emitters

•1-year warranty

•Easy installation—no need to supply local power to each slave

•Flexible operation for compatibility

•Wide coverage means greater efficiency

•Wide installed base of SET 100’s ensure a ready audience

•No need for adapters. Just plug and go

•Internal power supply (SI 20-R)

Technical Data

Carrier frequencies	95/250 kHz switchable
Number of diodes	12
Coverage area (mono/stereo)	750/375 sq. ft.
Input sensitivity	40 mV–20 V w/ Automatic Gain Control
Power requirements	110 V AC
Input connectors	1/4" unbalanced line level, (2) phone jacks
Output connectors	5-pin, lockable, Pre H connectors and (2) BNC
Weight	approx. 5.5 lbs.
Dimensions in inches	9 x 1.75 x 8

Product Variants

IR package to	cover 1500/750 sq. ft.
in single/ two channel mode		SI 20-1500
IR package to	cover 2250/1125 sq. ft.
in single/ two channel mode		SI 20-2250
IR package to	cover 3000/1500 sq. ft.
in single/ two channel mode		SI 20-3000

SI20R/SZI30R

SZI 30 RA

Polar pattern of the SI 20-R/SZI 20

Coverage area of the SI 20-R / SZI 20

Four SZI 20, mounted at an angle of 60° to one another. For comparison purposes, the coverage of a single SZI 30 is shown at 30°.

Supplied Accessories

1 power cord for 110V AC outlet

1 SZI 30 RA remote adapter and (2) pre H connectors for SZI 30

Required Components

Mounting clamp
(one required for each SI30 and SZI30)	IZK20
Coax cable with twisted pair (Belden 8734)
to connect SI20-R to SZI30-R, 6”	ICC 20-R

Optional Accessories

Mounting hardware for clusters
of 2 to 4 SI30 and SZI30	IZM 20
Wall/ceiling mount, 5/8” thread	WM1
Adapter, 5/8” to 3/8”, for mounting
a single SI30 or SZI30	MZA216
Omni-directional ball joint wall mount & flange	GZG1029 & GZP10
Floor stand	SEMS3000

Compatible Accessories

Single channel stethophone receiver, 95kHz	RI100-A/RI100-J
Single channel stethophone receiver, 250kHz	HDI91-P2
Two channel stethophone receiver	H200
Two channel stethophone receiver with squelch	HDI92-P
Charger and power supply for 10 batteries	L92-10 and NT92-120
Charger and power supply for 20 batteries	L92-20 and NT92-120
Charger and carrying case for 20 batteries	HC101
Spare rechargeable batteries	BA90 NiMH
Latex replacement ear cushions	EP405L
Foam replacement ear cushions	EP405F

Architect’s Specifications

The unit shall be a 2-Channel IR modulator & remote filter with 12 diodes. The carrier frequencies shall be 95 and 250 kHz. The frequencies must be switchable. The coverage area shall be 750 sq. ft. in mono mode, and 375 sq. ft. in stereo mode. The input sensitivity shall be 40 mV with automatic gain control. The power requirements shall be 110 V AC. The input connectors shall be 1/4" unbalanced line level connectors.The output connectors shall be 5-pin and lockable. The dimensions shall be 9 x 1.75 x 8 inches and weigh approx 5.5 lbs. The unit shall be a Sennheiser SI 20-R/SZI 20R.

Sennheiser Electronic Corporation, 1 Enterprise Drive, Old Lyme, CT 06371 Telephone: [phone] • Fax: [phone] • Web: http://www.sennheiserusa.com

Sennheiser Mexico: Av. Xola 613, PH6, Col. Del Valle 03100, Mexico, DF. Telephone: [phone]. Fax: [phone] Sennheiser Canada: 221 Labrosse Ave, Pte-Claire, PQ H9R 1A3. Telephone: [phone]. Fax: [phone] Manufacturing Plant: Am Labor 1, 30900 Wedemark, Germany