The PT435DC monitors direct-current battery voltage and supports both 12VDC and 24VDC banks. The installer selects between two modes: Mode A operates as a charge controller, while Mode B operates as a deep-discharge protection monitor. Two adjustable thresholds (upper and lower limit) drive a switching relay.

In Mode A, the relay arms when the battery voltage drops below the lower limit (battery under charge) and disarms when it rises above the upper limit (battery fully charged). In Mode B, the relay arms above the upper limit and disarms below the lower limit. The PT435.12-24.230 variant is powered from 230VAC mains and uses an 8-pin lamp-type base (socket code 525086 required).

Key Features

• DC voltage monitor for 12VDC and 24VDC battery banks
• Two selectable modes: charge controller or deep-discharge protection
• Adjustable upper limit: 13/26 to 15/30V
• Adjustable lower limit: 9/18 to 13/26V
• Powered by 230VAC mains
• POWER ON and RELAY ON LED indicators

Product Benefits

• Protects batteries from full discharge with automatic relay action
• Doubles as a charge controller, removing the need for a second device
• Built-in varistor guards against surges and lightning transients
• Compact 4.2x8.9x10cm body suits cabinet and panel installations
• Wide -20 to +50C operating range covers indoor and protected outdoor use

Technical Specifications

• Supply Voltage: 230VAC
• Monitored Voltage: 12VDC / 24VDC
• Output Relay: 1 changeover contact, 10A / 250VAC cat. AC1
• Upper Limit Range: 13/26 to 15/30V
• Lower Limit Range: 9/18 to 13/26V
• Protection: Varistor (surge and lightning)
• LED Indicators: POWER ON, RELAY ON
• Base: Lamp-type, 8-pin (socket code 525086)
• Operating Temperature: -20 to +50C
• Dimensions (WxHxD): 4.2x8.9x10cm

Why You'll Love It

• One module covers both charging supervision and discharge protection
• Independent upper and lower limits give fine control over relay behaviour
• Lamp-type 8-pin base allows quick swap-out without rewiring
• Package includes 1x PELC PT435.12-24.230 8-pin battery voltage monitor