SLC-220/MULTI
Smart Leakwise Controller

The SLC-220/MULTI Smart Leakwise Controller is a digital signal processor for full support of up to four LEAKWISE ID-220 Series Sensors.

Key features:

• Communication possibilities: Modbus through RS-485 or RS-232, optional cellular connectivity
• Low power consumption
• Outputs: up to 5 relays per sensor (dry contact SPDT), one analog 4-20 mA per sensor, Status Lights on front panel
• SLC-Manager PC program for system setting and calibration
• Optional 4.3″ color LCD touchscreen on front panel
• Flexible power options: AC, DC, or battery
• Optional Intrinsic Safety compatibility for the sensors (Zener Safety Barriers)
• Various enclosure options: IP65 / NEMA 4X (for safe areas) or NEMA 7 / Exd (for hazardous areas)
• Wide operating temperature: -20 °C to +70 °C

Suitable for diverse industrial applications, the SLC-220/MULTI, together with a LEAKWISE sensor, offers advanced monitoring and flexible integration for reliable hydrocarbon leak detection, monitoring and reporting.

Sensor Support:

Full support up to four LEAKWISE ID-220 series sensors.

Measurement Resolution: 0.1% of sensor’s output signal

Status Lights: Two configurable options:

• Default: Water, Oil, High Oil, Air, Fail, Power On: Six status lights common to all connected sensors.
• Option: Oil 1, Oil 2, Oil 3, Oil 4 (Oil or High Oil per connected sensor), Fail (common to all connected sensors), Power On.

Display (Optional): LCD display installed on the front panel: 4.3” color LCD, 480 x 272 resolution, with backlight and touch operation. Password protected. For configuration and calibration parameters setting and system status continuous viewing.

Serial Ports: Three serial communication ports

• 1 x RS-232 for configuration and calibration parameters setting (interface with PC/Laptop, at 57,600 bps, 8 data bits, no parity, 1 stop bit
• 1 x RS-232 port for optional cellular modem at 57,600 bps, 8 data bits, no parity, 1 stop bit, HW flow control
• 1 x RS-485 half-duplex port for communication to SCADA via Modbus protocol, at 57,600 bps, 8 data bits, no parity, 1 stop bit, settable slave address
• 1 x RS-485 half-duplex port – optional

Outputs Board: Up to four boards can be installed. One Outputs Board is supplied inside each controller, up to three additional boards are optional. Each Outputs Board includes:

• Five dry contact relays: A separate SPDT relay (N.O. and N.C. contacts, rated 6A at 250 VAC or 30 VDC) for Water, Oil, High Oil, Air and Fail indication for one sensor. May be used in Fail Safe mode.

Note: Each board can be set up to serve four sensors. The relays will indicate Oil / High Oil for sensor 1, Oil / High Oil for sensor 2, etc., and the Fail relay will be common to all sensors.

• One 4-20 mA output: Current source analog output indicating measured oil layer thickness and trend. User-configurable (by jumpers) to 4-20 mA, 0-20 mA, 0-24 mA or 0-5V output range.
• Maintenance test for the relays and 4-20mA output (jumper enabled).

Operation & Diagnostic: Built-in test for sensors and system diagnostics. SIL 2 verified

Firmware: Main Board firmware upgradeable through the PC RS-232 serial port.

Cellular Modem: Optional, LTE network compatible. Cellular modem and omnidirectional antenna to enable wireless remote reporting and setting to/from up to six cellular phones and two remote modems. SIM card supplied by user.

Installation Distance: Maximum distance to LEAKWISE ID-220 series sensors is 1,200m (4000 ft.), subject to hazardous area restrictions and use of Zener Safety Barriers. Two sets of Zener Safety Barriers can be installed in all enclosure types.

Power Supply: Three options for system power supply

• 110/220VAC (80-264 VAC, 50/60 Hz)
• 12 or 24VDC
• Ability to operate from a solar panel with 12VDC battery and charger (third party supply).

Power Consumption: 11.5W maximum, not including an optional cellular modem.

Enclosure: NEMA 4X (UL for USA and Canada) or IP65, for non-hazardous areas. (other enclosure options are available, see Enclosures & options)

Dimensions: 297 x 297 x 191 mm (11.69 x 11.69 x 7.52 in) for NEMA 4X / IP65 enclosure

Ambient Temperature: 

• Controller with 12 or 24 VDC input voltage: -40 °C to +85 °C
• Controller with 100-240VAC input voltage: -20 °C to +70 °C; Lower range available.
• Controller with LCD display: -20 °C to +70 °C
• Controller with cellular modem: -20 °C to +55 °C

Humidity: 5 to 95% non-condensing

Power consumption calculation: Low-power consumption when Outputs Boards or LCD are not in use.

• Each sensor consumes 120mW maximum; [four sensors = 0.12W max, since sensors are turned off when not sampled].
• The LCD display consumes 0.6W maximum with backlight, which is dimmed when not used for 15 minutes.
• Each Outputs Board consumes 2.6W maximum [four output boards = 10.4W max].

Total: 11.5W maximum, not including a cellular modem.

Enclosure Options: 

• NEMA 4X (UL for USA and Canada) or IP65, for non-hazardous areas. Dimensions: 398 x 297 x 191 mm (15.67 x 11.69 x 7.52 in).
• ATEX and IECEx Flameproof, certified as II2(1)GD – Ex db [ia Ga] IIB+H2 T6 Gb IP66. Dimensions:  Depends on the actual enclosure in use.
• UL for USA & Canada, Explosionproof NEMA 7 for Class I Groups B, C & D, also NEMA 4. Dimensions:  Depends on the actual enclosure in use.
• Controller without enclosure (Back Plate) for installation in a user-cabinet. Dimensions: 370 x 275.4 x 162 mm (14.6 x 10.8 x 6.4 in).

OPTIONS:

Display: LCD display installed on the front panel: 4.3” color LCD, 480 x 272 resolution, with backlight and touch operation. Password protected. For configuration and calibration parameters setting and system status continuous viewing.

Safety Safety Barriers:

Zener Safety Barriers installed inside the enclosure, in series with sensor cable. Up to four sets of safety barriers can be installed inside SLC-220/MULTI.

Cellular Modem:

LTE network compatible. Cellular modem and omnidirectional antenna to enable wireless remote reporting and setting to/from up to six cellular phones and two remote modems. SIM card supplied by user.

SLR-220 Receiver:

A special version of SLC-220 for interfacing up to four locally wired or remote sensors. A remote sensor is wired to a remote SLC-220/BASIC or SLC-220/MULTI. The SLR-220 and SLC-220 controllers are equipped with cellular modems for communicating the remote sensors to the SLR-220.