
Sentry SBC Controller Original Instructions 7
Installation
Installation should be performed by qualied personnel in accordance with state/provincial and local codes and
procedures.
Mount the controller in a location that is easily accessible and within view of the sampler.
Mount the controller in a vibration-free location and have a qualied electrician wire the controller to the electrical
supply.
Surge suppression and ltering is recommended but not required.
Hard wire the controller to instrument-quality power using appropriate certied conduit, ttings, and wiring or
cable.
Use a suitable external over-current protection device, such as a fuse or circuit breaker (15 A), and disconnect device.
The over-current protection and disconnect devices shall be installed on both the hot (L) and neutral (N) leads.
The disconnect device shall be located near the equipment and marked with appropriate ON(|) OFF(O) markings as
specied by local codes.
When penetrating the controller enclosure, use tubes and ttings that maintain the environmental rating of the
enclosure.
Inputs
ÂNOTE
Inputs I3 through I7 are located on the Index Cabinet. Inputs H1 through H4 and A1 are eld-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 ll in the Indexing Cabinet.
I5. IC DOOR: Proximity sensor input conrming position of door on the Indexing Cabinet. Operation inhibited if
door is open.
I6. IC Carousel: Proximity sensor input conrming 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 ow 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 ow based proportional sampling.