NorthStar RIM Tach
®
8500 & 8500 Quad Instruction Manual
5
Dynapar (800) 873-8731 November 2008
1.1 General
These instructions do not claim to cover all details of variation in equipment or to provide for every possible
contingency or hazard to be met in connection with installation, operation, and service. Should further information be
desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, please
contact
Dynapar
, or one of its designated representatives.
1.2 Description
The RIM Tach
®
8500 (and henceforth 8500 Quad) is a high performance, reliable Digital Tachometer, designed to
provide position and velocity feedback from both AC and DC electric motors with pulse counts ranging from 60
through 1200 pulses per revolution.
The RIM Tach
8500 allows up to 2 sensor modules, whereas the Rim Tach
8500 Quad allows
up to 4.
Designed for NEMA 180 through 500 diameter AC or DC motor frames, the RIM Tach
8500 utilizes rugged ductile
iron casting construction, and provides interchangeable sensor modules and a magneto-resistive technology capable
of withstanding the harshest industrial environments. This ensures a precise and consistent digital motor speed
feedback.
The NorthStar RIM Tach
®
8500 is mounted directly to the motor frame and utilizes a patent pending, heavy-duty,
one piece, magneto-resistance sensor module with encapsulated surface mount electronics. The encapsulation
provides resistance to water, oil mist, dirt, high temperatures, and other harsh environments. The sensor module
includes a 10-pin quick connector requiring only a screwdriver for final electrical installation. The non-contact
magneto-resistive sensor and rugged magnetized pulse wheel are designed and machined to function properly
without any adjustments when assembled to a NEMA 180 type C Face (8.5-inch diameter) motor frame and
accessory mount. There are no bearings to fail or requirements for flexible couplings since the magnetized pulse
wheel assembly is attached directly to the shaft. The RIM Tach
8500 provides precise, reliable speed signals for
many monitoring and control applications, and is a standard feedback device for AC and DC variable speed drives.
The unit is bi-directional providing square wave outputs.
Dimensio ns (RE F): inch (mm)
Channels
PPR
Single
B
C
Dual
D
C
60, 120, 240, 480, 960
64, 128, 256, 512, 1024-Z
75, 150, 300, 600, 1200-Z
12.13[308.1]
12.28[312.0]
12.69[322.5]
7.33[186.2]
7.48[190.0]
7.89[200.5]
15.42[391.8]
15.72[399.3]
16.55[420.4]
7.33[186.2]
7.48[190.0]
7.48[190.0]
4 X 50-1 3UNC X 3 .47 stud s
4 X .50-13UNC acorn nuts
on
C
(2
.2
7
[5
8
])
.25[64]
(92[234])
(1.02[25])
1/2" N P T
Condu it C on nec tion
8
.9
8
[2
2
8
]
"C"
"C"
"D"
"B"
.06[1.5]
∅
8
.5
0
0
[2
1
5
.9
]
-0
0
0
[0
0
]
-.
0
0
2
[.
0
5
]
∅
8
.5
00
[2
1
5.
9]
+
.0
01
5[
.0
38
]
+
.0
00
5[
.0
13
]
2.56[65.0]
3.15[80.0]
.20[5.1]
Figure 1: RIM Tach
8500 Thru-Shaft Enclosure/Sensor Physical Dimension
