--- title: Hardware Outputs for the SCS 500 & 600 Controller description: These Hardware Set Up parameters define how the peripheral refrigeration system components are connected to the SCS Controller for output control. --- [Skip to content](https://support.aofrio.com/hardware-outputs-for-the-scs-controller#main-content) - [English](https://support.aofrio.com/hardware-outputs-for-the-scs-controller) - [Español - México](https://support.aofrio.com/es-mx/hardware-outputs-for-the-scs-controller) - [Português - Brasil](https://support.aofrio.com/pt-br/hardware-outputs-for-the-scs-controller) English Show submenu for translations ![](https://support.aofrio.com/hs-fs/hubfs/e7b764c0-c89a-4e26-92a2-ab6256f23c6a_medium.png?width=100&height=75&name=e7b764c0-c89a-4e26-92a2-ab6256f23c6a_medium.png) Open main navigation Close main navigation - - [English](https://support.aofrio.com/hardware-outputs-for-the-scs-controller) - [Español - México](https://support.aofrio.com/es-mx/hardware-outputs-for-the-scs-controller) - [Português - Brasil](https://support.aofrio.com/pt-br/hardware-outputs-for-the-scs-controller) English Show submenu for translations - Contact us Contact us How can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://support.aofrio.com/?hsLang=en) 2. [IoT hardware operation & behavior](https://support.aofrio.com/iot-hardware-operation-behavior?hsLang=en) 3. [SCS Controller - Parameters](https://support.aofrio.com/iot-hardware-operation-behavior?hsLang=en#scs-controller-parameters) August 14, 2025 # Hardware Outputs for the SCS 500 & 600 Controller ## These Hardware Set Up parameters define how the peripheral refrigeration system components are connected to the SCS 500 & 600 Controller for output control. ### **Compressor** **Compressor Port Configuration** Selects the Compressor connection port: - C. = Not Connected - R = 3A Relay o/p - C = 8A Relay o/p | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | CPC | Port ID | R, C, or NC | C | **Compressor State** Selects the Relay state when the Compressor is on. This function is only used when an External Relay is fitted to the Compressor. - 0 = Normally open (Relay contact open when Compressor is off). Default. - 1 = Normally closed (Relay contact closed when Compressor is off). | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | CPS | Integers | 0 to 1 | 0 | --- ### **Evaporator Fan** **Evaporator Fan Port Configuration** Selects the Evaporator Fan connection port - C. = Not Connected - S1 = 0.4/0.6A Solid State Relay o/p - S2^ = 0.4/0.6A Solid State Relay o/p (^ Not available on SCS500 variants) - S1&S2^ = 0.8/1.2A Solid State Relay o/p (^ Not available on SCS500 variants) Only supported by HW: +SCS Adv, +SCS Adv No Display | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | EFC | Port ID | S1, S2, S1&S2, R or NC | S1 | **Evaporator Fan Control Type** Selects whether the Evaporator Fan Port operates as an ON/OFF switch or as a variable speed fan control output. - on/off = Normal Switch - Var = Variable Speed Fan Control | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | ECt | text | on/off or Var | on/off | **Evaporator Fan Direction** Selects the direction of the evaporator fan rotation. | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | EFd | Dir | CW or CCW | CCW | --- ### Condenser Fan **Condenser Fan Port Configuration** Selects the Condenser Fan connection port: - C. = Not Connected - S1 = 0.4/0.6A Solid State Relay o/p - S2^ = 0.4/0.6A Solid State Relay o/p (^ Not available on SCS500 variants) - S1&S2^ = 0.8/1.2A Solid State Relay o/p (^ Not available on SCS500 variants) Only supported by HW: +SCS Adv, +SCS Adv No Display | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | CdC | Port ID | S1, S2, or NC | NC | **Condenser Fan Control Type** Selects whether the Condenser Fan Port operates as an ON/OFF switch or as a variable speed fan control output. - 0 = Normal Switch - 1 = Variable Speed Fan Control | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | CCt | text | on/off or Var | on/off | **Condenser Fan Direction** Selects the direction of the condenser fan rotation.   | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | CFd | Dir | CW or CCW | CCW | --- ### Defrost **Defrost Port Configuration** Selects the Defrost Coil connection port. This function is only used with a Heated Defrost Cycle. Please also refer to ‘Defrost State’ (dFS). - NC = Not Connected - R = 3A Relay o/p - C = 8A Relay o/p | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | dFC | Port ID | R, C, or NC | NC | **Defrost State** Selects the Relay state when the Defrost Cycle is off. Please also refer to ‘Defrost Port Configuration’ (dFC). - 0 = Normally open (Relay contact open when Defrost Cycle not running). Default. - 1 = Normally closed (Relay contact closed when Defrost Cycle not running). | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | dFS | Integers | 0 to 1 | 0 | --- ### **5V Port** **5V Port Configuration** Enables the 5V output on AD4 - 0 = output disabled - 1 = continuous 5V output enabled | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | dCC | Text | NC or AD4 | NC | --- ### Lighting Port Configuration Selects the lighting connection Port.  - C. = Not Connected - R = 3A Relay o/p - C = 8A Relay o/p - S1 = 0.4/0.6A Solid State Relay o/p - S2^ = 0.4/0.6A Solid State Relay o/p (^ Not available on SCS500 variants) - LE1^ – LE3 = Switched 24V o/p (^ Not available on SCS500 variants) - AD5^\* = Switched 24V o/p (limited by HW to min duty of 5%) (^ Not available on SCS500 variants, \* FW versions 1580 onwards) **Channel A** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LCA Port ID | Port ID | C, R, S1-2, LE1-3, AD5 or NC | R | Please also refer to Lighting State - Channel A (LEA). **Channel B** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LCb | Port ID | C, R, S1-2, LE1-3, AD5 or NC | NC | Please also refer to Lighting State - Channel B (LEB).  **Channel C** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LCC | Port ID | C, R, S1-2, LE1-3, AD5 or NC | NC | Please also refer to Lighting State - Channel C (LEC). **Channel D** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LCd | Port ID | C, R, S1-2, LE1-3, AD5 or NC | NC | Please also refer to Lighting State - Channel D (LED). NOTE: Only supported by HW: SCS Adv, SCS Adv No Display **Channel E** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LCE | Port ID | S1, S2, R, C, or NC | NC | Please also refer to Lighting State Channel E (LEE). NOTE: Only supported by HW: SCS Adv, SCS Adv No Display. LE1 – LE3 and AD5 = Not applicable --- ### Light State Selects the relay state when the port is configured to a digital output and lighting is off. - 0 = Normally Open (Relay contact open when lights are off) (Switched 24V open when lights are off) - 1 = Normally Closed (Relay contact closed when lights are off) (Switched 24V closed when lights are off) When associated lighting channel is configured to an LED channel, this parameter has no effect. **Channel A** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LEA | Integers | 0 to 1 | 0 | Please also refer to the Lighting Port Configuration – Channel A (LCA).  **Channel B** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LEb | Integers | 0 to 1 | 0 | Please also refer to the Lighting Port Configuration – Channel B (LCb). **Channel C** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LEC | Integers | 0 to 1 | 0 | Please also refer to the Lighting Port Configuration – Channel C (LCC). **Channel D** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LEd | Integers | 0 to 1 | 0 | Please also refer to the Lighting Port Configuration – Channel D (LCd). NOTE: Only supported by HW: SCS Adv, SCS Adv No Display **Channel E** | **Digital display** | **Increments & units** | **Parameter range** | **Default** | | --- | --- | --- | --- | | LEE | Integers | 0 to 1 | 0 | Please also refer to the Lighting Port Configuration – Channel E (LCE).  NOTE: Only supported by HW: SCS Adv, SCS Adv No Display - [Support for your role](https://support.aofrio.com/support-for-your-role?hsLang=en#main-content) - [Service technician](https://support.aofrio.com/support-for-your-role?hsLang=en#service-technician) - [Hardware installer](https://support.aofrio.com/support-for-your-role?hsLang=en#hardware-installer) - [OEM buyer or engineer](https://support.aofrio.com/support-for-your-role?hsLang=en#oem-buyer-or-engineer) - [Fleet manager](https://support.aofrio.com/support-for-your-role?hsLang=en#fleet-manager) - [Food Safety manager](https://support.aofrio.com/support-for-your-role?hsLang=en#food-safety-manager) - [Your AoFrio account](https://support.aofrio.com/support-for-your-role?hsLang=en#your-aofrio-account) - 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