SOR Single Point Ultrasonic Level Switch - Manual (Page 7)

Form 771 (08.13) ©SOR Inc. 7/20
Electrical Connection (Intrinsically Safe)
Intrinsically Safe Models (does not apply to viscous or epoxy controls and sensors):
Any model numbers containing the designators “AI”, “CI” or “FI” are listed Intrinsically
Safe with CSA (AI), CENELEC (CI) or FM (FI). Please note the housing nameplate to deter-
mine the Agency Approval of your instrument. Connections must be as shown on the SOR
Control Drawings shown on pages 8-12.
AI CSA Intrinsically Safe... ................Class I, Div. 1, Groups C, & D; Class II, III, Div. 1,
Groups E, F, & G; Class I, Div. 2, Groups A, B, C, D; Class II, III, Div. 2, Groups F, G;
Type 4X; T4
Connections must be as shown on the SOR Control Drawing 9065-136.
CI CENELEC Intrinsically Safe...... ....................................................EEx ia IIB T4, IP65
Connections must be as shown on the SOR Control Drawing 9065-146.
FI FM Intrinsically Safe....... ............................................Class I, Div. 1, Groups C, & D;
Class II, III, Div. 1, Groups E, F, & G; Class I, Div. 2, Groups A, B, C, D;
Class II, III, Div. 2, Groups F, G; NEMA 4X; T4
Connections must be as shown on the SOR Control Drawing 9065-135.
Electrical Connection (CE Marking)
Shield Beads
Three beads are included with your CE marked unit. Two of the beads are 5/8” dia. x 1/2”
long; they are used in the sensor installation. (See page 3.) The other bead is 3/8” dia. x
3/4” long. Use this bead for the following electrical connection.
In order to achieve the stated accuracy of ±1mA, a customer supplied shielded cable and
cable gland are used with the furnished 3/8” dia. x 3/4” bead. SOR recommends using a
shielded cable made of PVC insulation around a tinned copper braid shield (Olflex CY or
equivalent). Install the bead as close as possible to the cable gland.

Strip outer cable insulation and shield approx.
10 inches.

Separate the positive and negative wires.

Slide the bead over both wires.

Wrap each wire around opposite sides of the bead
to make two complete loops. (See )

Make internal power connections as shown on page 4.

Install the cable gland per manufacturer’s instructions. The cable gland will provide
necessary grounding for the cable shield.
Install bead as close as
possible to cable gland