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TNR1

TNR2

Data Rx TTL Level

Data Tx TTL Level

GND

+12VDC 

Note: Do not put RS-232-

level signals into the pins.

Must use Advanced

Programming Cable P/N

2500-521065.

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ST2-KP Side Panel

The ST2-KP’s setup button, OS update pins and hardware tuner select pins are 

located on the right side of the keypad (when facing front).

CAT-5 Connection

The ST2-KP keypad uses a 110-

punchdown terminal on the back

panel to provide a simple installation

and strong connection for CAT-5

cable’s eight conductors. Punchdown

terminals require the use of a punch-

down tool. Attach the CAT-5 cable to

the 110-punchdown terminal on the

ST2-KP keypad as shown, matching

the conductor colors to the connec-

tion color guide. The keypad will not

operate properly if the terminations

deviate from the required connection

order.  

Take care when using an impact 110

punchdown tool, as this may over-

spread the contact points. Use of the

impact tool may propel stray bits of

wire and jacket into the keypad’s chas-

sis and possibly cause a short in the cir-

cuitry. Gently shake or blow air through

the keypad chassis to remove stray

wire before the keypad is installed into

the junction box.

ST2-KP Back Panel

Keypad Installation

1. Check whether or not you can route the wire to the location you

have chosen.

2. To install a single-gang keypad, you will need to use a UL/CSA

approved plastic single-gang (18 ci) electrical box or a low voltage

mounting ring.

3. Route CAT-5 wire to the junction box from the ST2 tuner.

4. Use a 110 punchdown tool to connect each wire to its correspon-

ding color labeled on the punchdown terminal.

5. Mount the keypad in the electrical box and attach the cover plate.

CAT-5 Cable

Keypad to ST2 Connection

The ST2 tuner supports up to two ST2-KP keypads. An SA-ZX3 Keypad Splitter

can be used to add additional keypads.

The ST2-KP connects to the ST2 tuner with CAT-5 cable. 

The keypad connects to the ST2 tuner with an RJ-45 (T568A) jack on the tuner

connection end of the cable. 

Be sure to use the keypad ports for the ST2-KP and NOT the RNET link ports.

Note:

ST2-KP keypads are not to be used when the ST2 Tuner is a component

of an RNET™ controller such as the CAV6.6. The RNET-system keypads are

capable of providing all functions of the ST2-KP. 

Junction Box

ST2-KP

Back Plate

Cover Plate

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OS Update/Run Jumper -The pins are jumpered when performing an OS update

on the keypad, and the jumper is left on one pin during normal operation.

(Typically needed only on a keypad that has never been updated)

Hardware Selected Tuner Jumper - The ST2-KP can be set to select only Tuner 1

(jumper on bottom two pins) or Tuner 2 (jumper on top two pins), or to select

both tuners (no jumper or simply store jumper on a single pin).

Setup Button - Activates information and update menus for the keypad.

OS Update Port - Used to update the ST2-KP keypad operating system firmware.

If an update is released, it will be available online through the Document Center

on 

www.russound.com.

Look for it in the “Firmware and Downloads” section

under Multi-Zone product type. The Advanced Programming Cable is available

from Russound, Part #2500-521065. 

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ST2-KP Side View

Tuner 2 

selected

Tuner 1 

selected

Safety Instructions

1. Read Instructions - All the safety and operating instructions should be

read before the appliance is operated.

2. Retain Instructions - The safety and operating instructions should be

retained for future reference.

3. Heed Warnings - All warnings on the appliance in the operating instruc-

tions should be adhered to.

4. Follow Instructions - All operating and user instructions should be fol-

lowed.

5. Water and Moisture - The appliance should not be used near water; for

example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet

basement, or near a swimming pool.

6. Wall Mounting - The appliance should be mounted to a wall only as 

recommended by the manufacturer.

7. Heat - The appliance should be situated away from heat sources such as

radiators, heat registers, stoves, or other appliances (including ampli-

fiers) that produce heat.

8. Power Sources - The appliance should be connected to a power supply

only of the type described in the operating instructions or as marked on

the appliance.

9. Object and Liquid Entry - Care should be taken so that objects do not fall

and liquids are not spilled into the enclosure through the openings.

10.Damage Requiring Service - The appliance should be serviced by quali-

fied service personnel when:

A.

Objects have fallen, liquid has been spilled into the appliance; or

B.

The appliance has been exposed to rain; or

C.

The appliance does not appear to operate normally; or 

D.

The appliance has been dropped.

11.Servicing - The user should not attempt to service the appliance beyond

that described in the operating instructions. All other servicing should be

referred to qualified service personnel. 

Precautions:

1. Do Not Touch The Unit With Wet Hands – Do not handle or touch the

keypad when your hands are wet or damp. If water or any other liquid

enters the ST2-KP’s cabinet, take the unit to a qualified service person

for inspection.

2. Care – From time to time you should wipe off the front panel with a soft

cloth. Do not use rough material, thinners, alcohol or other chemical sol-

vents or cloths since this may damage the finish or remove the panel

lettering.

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Tuner 1 + 2

selected

OS update

mode selected

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