Electrical Wiring - Thermo Scientific 60-12 Operating And Service Manual

2.4

Electrical Wiring

Use the following procedures to make electrical connections:
1. Remove the terminal strip cover (Figure 1-1) and the dust plug from the threaded conduit
aperture in the speed sensor housing.
2. Install 1/2 inch flexible conduit to the speed sensor housing.
3. For 60-12C speed sensor, use Beldon 8760 or equivalent, 2 conductor, 18 AWG,
shielded, when total length between speed sensor and totalizer is 200 feet or less. Use
Beldon 8780, 2 conductor, 16 AWG, shielded when total length is 201 to 3,000 feet.
For 60-12F, G, or ENC models, use Beldon 8772 or equivalent, 3 conductor, 20 AWG,
shielded. Maximum distance is 200 feet.
4. Do not put speed sensor cables in the same conduit as power wiring.
5. Connect one wire to each of terminals 15, 16, and 17 as shown in Figure 2-4. (No
connection is needed to terminal 17 for 60-12C speed sensor.) Replace the terminal
strip cover.
The three wires connecting the speed sensor
to the integrator/totalizer must be shielded.
Refer to system wiring diagram for proper
shield termination.
REC 3016 Rev M
CAUTION
9