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Installation
ƒ Installation should be performed by qualified personnel in accordance with state/provincial and local codes and
procedures .
ƒ Mount the controller in a location that is easily accessible and within view of the sampler .
ƒ Mount the controller in a vibration-free location and have a qualified electrician wire the controller to the electrical
supply .
ƒ Surge suppression and filtering is recommended but not required .
ƒ Hard wire the controller to instrument-quality power using appropriate certified conduit, fittings, and wiring or
cable .
ƒ Use a suitable external over-current protection device, such as a fuse or circuit breaker (15 A), and disconnect device .
ƒ The over-current protection and disconnect devices shall be installed on both the hot (L) and neutral (N) leads .
ƒ The disconnect device shall be located near the equipment and marked with appropriate ON(|) OFF(O) markings as
specified by local codes .
ƒ When penetrating the controller enclosure, use tubes and fittings that maintain the environmental rating of the
enclosure .
Inputs
 NOTE
Inputs I3 through I7 are located on the Index Cabinet . Inputs H1 through H4 and A1 are field-mounted devices . The signals are
processed in the Sentry SBC Controller .
I1 .
REMOTE ENABLE: External contact from customer which, when open, prohibits all operation of the sampler . If
not used, leave terminals TB2 1 and 2 wired together .
I2 .
REMOTE START: External contact from customer, using terminals TB2 3 and 4, which initiates sampling when in
REMOTE mode .
I3 .
SAMPLER PROX 1: Proximity sensor input . Used for control of MG and SA/E samplers .
I4 .
SAMPLER PROX 2 or IC Jar Sensor: Secondary proximity sensor input or proximity sensor used to sense level of
jar fill in the Indexing Cabinet .
I5 .
IC DOOR: Proximity sensor input confirming position of door on the Indexing Cabinet . Operation inhibited if
door is open .
I6 .
IC Carousel: Proximity sensor input confirming the position of the carousel of the Indexing Cabinet .
I7 .
IC Manual Pushbutton: Manual advance pushbutton for the Indexing Cabinet .
I8 .
Delay Start: Contact closure triggers a time delay . After delay timer expires, sampling will start .
H1 . High Speed Counter: Flow counter input used for flow based sampling (10 kHz max frequrency; 100 µs min
pulse resolution) .
H2 . Digital or COUNTER Input: Extra digital input or high speed counter input available for future control
enhancements .
H3 . Digital or COUNTER Input: Extra digital input or high speed counter input available for future control
enhancements .
H4 . Product Backup Sensor: Proximity sensor input used for sample backup indication .
A1 . 4-20 mA INPUT: Flow meter output used for flow based proportional sampling .
Sentry SBC Controller
Original Instructions
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