Johnson Controls CSDSC, CSDECM Product Update Bulletin

CSDSC and CSDECM Current Switch Devices

Product Bulletin

The Current Switch Devices Self-Calibrating (CSDSC) Series of Current Switch Devices provide reliable verification of electrical equipment operation in a variety of applications, including fans and pumps. CSDSC current switch devices use a single-turn dial to select motor full load amps, eliminating the need for live calibration and significantly reducing installation time compared to traditional current switches.

CSDSC switches use full load amps instead of horsepower, eliminating the need for separate part numbers as a function of line voltage. CSDSC current switches are installed when the panel is de-energized. The ability to preset the sensor eliminates the need for Personal Protective Equipment (PPE) that is required by OSHA when working with a live panel.

The fixed setpoint Current Switch Device for Electronically Commutated Motors (CSDECM) Series of Current Switch Devices feature a range of minimum turn-on options including 250 mA, 350 mA, and

500 mA. These options eliminate the possibility of a false reading. Even when idle, ECMs draw a small amount of current. Some fixed point sensors feature a minimum turn-on value within the vicinity of the ECM’s idle current, making them ineffective in distinguishing between on and off status.

Code No. LIT-12012403

Issued September 2017

Figure 1: CSDSC Current Switch Devices

Figure 2: CSDECM Current Switch Devices

CSDECM Current Switch Devices can also be used with other electrical loads when a simple sensor is needed.

Features and Benefits

•Split and Solid Core Models with Mini-Sized Variants—Fit in tight enclosures.

•Monitored Load—Supplies power without a power supply.

•Optional N.O. Relay—Adds 10 A at 125 VAC switching power with a choice of 24 or 12 V coil.

•Polarity Insensitive Output—Provides easier wiring.

•Low Turn on Current—Extends use to sub-fractional HP motors.

•LED Indication of Switch Status—Allows you to easily check the switch’s on/off status (CSDSC switch only).

CSDSC and CSDECM Current Switch Devices Product Bulletin

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Operation

The CSDSC and CSDECM Current Switch Devices have an N.O. output (1.0 at 30 VAC/VDC). The output on the CSDSC switch closes when the monitored current exceeds 70% full load amps and opens when the current falls below 60% full load amps, making the loss of load detection permissible without calibration. The output on the CSDECM switch closes when the monitored current exceeds the indicated minimum turn-on amps; it remains open when falling below the same threshold.

Ordering

Table 1: CSDSC Current Switch Devices Ordering Information

Code Number	Core Type	Minimum Turn-On	Maximum	LEDs	Relay Option
		Amps	Amps
CSDSC-C45050Lx	Clamp	0.45 A	50 A	High, Low,	Yes1
				Power
CSDSC-C50100Lx		0.50 A	100 A
CSDSC-C50150Lx			150 A
CSDSCM-C01050		1.00 A	50 A	Trip	No
CSDSCM-S75050L	Solid	0.75 A	50 A
CSDSCM-S75005L
CSDSCMM-S75050L

1.See Table 3 for relay order code information.

Table 2: CSDECM Current Switch Devices Ordering Information
Code Number	Core Type	Minimum Turn-On		Maximum	LEDs	Relay Option
		Amps		Amps
CSDECM-C35200Lx	Clamp	0.35 A		200 A	No	Yes1
CSDECMM-C50050		0.50 A		50 A		No
CSDECM-S25050L	Solid	0.25 A
CSDECMM-S25050L

1.See Table 3 for relay order code information.

Table 3: CSDSC and CSDECM Relay Options
Relay Order Code	Contact Rating	Coil	Relay Code	Relay Dimensions, in.
			Number (Field	(mm) (L x H x W)
			Accessory)
1	N.O. 10 A at 125 VAC	24 VAC/VDC 15 mA	CRCSDP-NO-24	0.84 x 0.72 x 2.06
				(21.3 x 18.3 x 52.3)
2	N.C. 10 A at 125 VAC		CRCSDP-NC-24
3	N.O. 10 A at 125 VAC	12 VDC 30 mA	CRCSDP-NO-12
4	N.C. 10 A at 125 VAC		CRCSDP-NC-12
0	No Relay	N/A	N/A	N/A

CSDSC and CSDECM Current Switch Devices Product Bulletin

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