Sonance One Zone Amplified Connecting Block ACB1 - Manual (Page 2)

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CAUTION: Do not use unregulated 12V power supply adapters from other manufacturers.
These may deliver excessive voltage to the IR receivers and cause them to “latch-up”. When
this occurs, the “talk-back” LEDs and VE1 emitters (if used) will stay on continuously!
4. For clarity, connections in this illustration are
shown going to a 3-conductor bus in a "daisy
chain" fashion. In an actual installation, however,
it is recommended that 4-conductor "home-runs"
be pulled from each room to the ACB1 Connecting
Block in the main room. This maintains higher
power supply voltage to each IR receiver and
keypad for best operation (plus a spare lead).
5. The "IR RCVR" jack on the ACB1 allows the
SMR1P and the CR1 (with a 3.5 mm stereo mini
plug) to be plugged directly into the ACB1. You
can do this when the ACB1 Connecting Block is
within reach of the IR receiver's cable -- such as when installing the SMR1P in a cabinet
where the controlled equipment is behind closed doors.
CAUTION: Plug only Sonance IR Receivers equipped with a stereo mini plug into the
IR RCVR jack. Do not plug in emitters or other devices. To do so will destroy emitters
and damage power supplies!
Emitter Output Ports - High and Low Power Settings
The emitter ports are driven in parallel with a choice of either a 100 Ohm or a 470 Ohm
resistor connected in series with each port. The 100 Ohm choice delivers high power output
and the 470 Ohm setting is lower power. The high power setting is achieved by plugging a
small jumper (10 are supplied) onto the pair of pins adjacent to the desired emitter port, as
shown in Fig. 3 below. The low power option is with the jumper removed.
NOTE: The ACB1’s are shipped from the factory with the jumpers removed
(low power position).
Consider the following factors when choosing high or low power modes:
1. In the majority of cases, when you mount an emitter on the IR sensor window of the con-
trolled device, you would use the low power mode (jumpers removed).
This prevents overload of high gain sensor circuits and allows proper operation.
2. The high power mode may be used in installations where you mount the emitters on an
+12VDC
GND GND
SIGNAL
EMITTERS
PWR
IR RCVR
CR1 HUB CONNECTING BLOCK
Fig. 2: A Typical ACB1 System
33-1285 ACB1-instr 3-02 5/8/02 11:38 AM Page 2