SBS -H2 Installation, Operating, & Maintenance Instructions page 7

For installation of a second sensor
One additional sensor may be added to each detector. Multiple detectors can be installed to
meet the space coverage requirements of your particular installation.
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Locate the 2 sensor installation point within 25 feet of the detector and mount the sensor.
Connect the cable from the second sensor to the Sensor 2 input labeled on the cover. On the
detector printed circuit board, remove the jumper on P9 to enable the second sensor input.
Either sensor is capable of triggering a warning or alarm condition.
Switching from Voltage to Current Output- Required when using cable longer than 100 ft.
When using cable exceeding the 100FT sensor cable (SBS Part# H2-100FT-CABLE), the
Sensor jumper must be moved on the sensor input from the off condition to the on condition, so
it covers both pins.
1. Removing the front snap on cover will reveal the inner electronics of the alarm box.
2. Locate the signal output select jumper(s) (P5 for Sensor 1 and P6 for Sensor 2).
3. Install the jumper across the two pins to enable the current output mode (see photos)
Sensor Disabled
(40mA Signal Output)
Wiring Diagram:
1. The detector has 2 internal relays. One relay energizes when the sensor detects a 1%
concentration of hydrogen gas in the air surrounding it. The second relay contact energizes at a
2% concentration.
The detector's internal relays are rated: 10 amps at 250 volts ac; 10 amps at 30 volts dc; 1/3
horsepower at 125 volts ac; 1/2 horsepower at 250 volts ac.
SBS-H2 Users Manual
Pre-March 2016 Version
Note: (Alarm will emit a
"chirp" noise if sensors are
not connected)
Sensor Enabled
(Voltage Signal Output)
Rev 1.4
7
th
January 6 2013