SG1000RA general description (‘R’ is for ‘relays’)
The SG1000RA is a SlideGate Monitor with a 2-Relay output.
The SG1000RA is a rugged, medium cost encoder-based
monitoring device that enables the end-user to very accurately
monitor a slide-gate’s fully-open and fully-closed positions.
The SG1000RA has two modes: Calibration Mode, and Normal
Operating Mode. A simple calibration procedure teaches
(programs) the SG1000RA the fully-closed (0% open)
and fully-open (100% open) gate positions. Once programmed,
the SG1000RA de-energizes one relay when the gate is in the
fully-closed position, and de-energizes the other relay when the
gate is in the fully-open position. Any gate position between
fully-closed and fully-open, is represented by both relays being
energized.
Physical Appearance and Installation Overview
Figure 1 is the front-view of the SG1000RA, showing the
encoder-output-shaft (with the most common shaft end-thread
type shown).
Encoder-Shaft
3/8"-16 UNC-2A threads
Cable
Figure 1:
The SG1000RA attaches to the slide-gate’s ‘rack and pinion’
shaft, or similar rotating mechanical component, using an “end-
of-shaft” mounting method. See Figure 2. In the most common
application, the SG1000RA’s encoder-shaft-end screws into a
single 3/8-inch diameter hole, to a depth of 0.625 inch, having
3/8” – 16 UNC-2B threads. (Other encoder-shaft end-thread
types are optional.)
Even though the SG1000RA is mounted to the process shaft
via the “end-of-shaft” mounting method, installation of flexible
conduit and of the optional stabilizer bracket is recommended,
which allows the SG1000RA to “float” along with any wobble
of the process’s shaft while still preventing the SG1000RA itself
from rotating along with that shaft (see Fig. 2).
Note:
The stabilizer bracket’s U-bolt is slightly oversized
to provide about 1/8” of slack between it and the
SG1000RA. The U-bolt’s slack prevents it from
rigidly clamping to the SG1000RA’s conduit port.
Process Shaft
SG1000
Stabilizer bracket
(use is optional)
U-Bolt
with slack
Structural Framework
Flexible
conduit
Figure 2:
Electrical connections
First, remove (twist CCW) the back-end-cover from the
SG1000RA’s red enclosure, to reveal the User Interface Board
(see Figure 3).
0
F
E
DC
B A 9 8 7 6
5
43
2
1
RELAY 2
SW1
SW2
1
2
3
CAL
CAL
SET-POINT
RELAY 1
Red LED
100% Open
Relay
SW1 Relay
Setpoint
Selection
Red LED
0% Open
Relay
Green LEDs
Calibration
Status
SW2 Calibration Button
Figure 3: User Interface Board
Second, remove the nylon-retained metal nuts that hold the User
Interface Board in place, to reveal the terminal block TB1 (see
Figure 4)
Terminal Block
TB1
Earth Ground
Screw
1 2 3 4 5 6 7 8 9 10
Figure 4: Terminal Block View
SG1000RA SlideGate Monitor
6111 Blue Circle Drive
Minnetonka, MN 55343
Phone: 952.930.0100
Fax: 952.930.0130
ISO 9001:2015 Certified
Free Catalog and Application Assistance
1.800.328.6170
Visit Us Online
www.electro-sensors.com
990-007000 Revision A
