Beckwith Electric M-2035 Analog to Digital Interface Module

• Designed to interface with the M-7679 R-PAC.

• Allows the M-7679 R-PAC to monitor third party external power supplies and

12/24 V battery chargers.

• Provides four 0-30 Vdc Analog inputs. Using S-7600 IPScom communications

software, these inputs can be monitored and configured with two level

alarm settings per channel, and used in IPSlogic custom configurations.

• Monitor and test the battery system. Turns off the battery supply to enter

sleep mode during power loss.

• Transient and reverse polarity protected

• Operates on DC power from 8 to 30 V

• Substation hardened -40° C to +85° C

• Conformal coated

Introduction

The M‑2035 Interface Module monitors power supplies and battery chargers

used in Reclosers that have been retrofitted to operate with Beckwith

Electric's M-7679 R-PAC system. This analog to digital interface measures

voltage, current, and current direction which can be monitored with the

same S-7600 IPScom communication software used with the recloser control.

The interface module can be DIN rail mounted during installation of the

M-7679 R-PAC and includes a SATA cable for easy hookup to the Aux I/O port

in the recloser control. The module will accept 8 to 30 Vdc power from the

existing power supply and batteries.

The module features essential indicator lights for battery and communication

status plus on‑board and remote manual wake-up pushbuttons to restore

function after a power failure. Four extra analog to digital inputs are available

for voltage measurements up to 30 Vdc. The module is able to periodically

test the batteries by briefly disconnecting the charger with a high side switch

and switching on a resistive load for five seconds.

Configurable DC Power Monitoring

Four analog inputs allow the user to remotely monitor DC voltages from 0 to

30 Vdc. Each input can be configured with two setpoints to report when voltage

drops below the specified levels. The analog to digital converter is 12 bit and

averaging is done over 128 samples to increase resolution to 16 bits.

Analog metering data is updated every 64 ms.

Summary of Operation

• Installed between the battery and battery charger (with fuse protection for

reverse polarity of charger or battery), the M-2035 measures battery voltage,

charge and discharge current, detects AC power loss, and sends the

measurements to the controller through the SATA communication interface.

• Continuously monitors charger voltage. Conducts scheduled battery load

tests on 12 and 24 V battery configurations while automatically disconnecting

and reconnecting the battery charger.

• During tests, module controls the battery load resistor via command from

the M-7679 R-PAC so that when the load resistor is turned on, it disconnects

the high side switch. Reconnects high side switch after load resistor is turned

off. Does not turn on load resistor if loss of main power is detected.

• When running on battery power, the M-7679 R-PAC commands the M-2035

module to enter low power mode if the battery voltage drops below "Vmin Bat"

setting, disconnecting the M-7679. Local or remote pushbutton provides "

wakeup from sleep" functionality. When pressed, the pushbutton releases

module from sleep and activates high side switch to reconnect the battery

and power supply.

• While in the sleep mode, the M-2035 module wakes up every 5 seconds to

measure voltage at Charger Input (TB4) to determine when main power

returns. Provides "wakeup" functionality when main power is restored.

Turn-on/off Battery Load Test Command

Test frequency is user defined in the Battery Charger common setpoints in

IPScom communication software.

The M-7679 R-PAC issues the "Turn-on/off Battery Load Test" command to the

M-2035 to test the battery capacity only when the charger is operating from

the main power supply.

Battery Supply Off Command

When the battery voltage decreases to less than "Vmin Batt" (Figure 1) the

battery supply to the M-7679 R-PAC will be turned off to protect the battery.

The M-2035 remains connected to the battery. Discharging batteries below

certain levels will shorten the life of or damage the battery.

Threshold voltages can be edited in IPScom/Common Setpoints/IED Power

Supply/Battery Charger Monitor screen.

Wakeup System Command

The Wakeup system command is initiated with local panel pushbutton, allowing

the user to wake module from the Sleep Mode that was initiated by the Battery

Supply Off command. The wakeup system command restores power to the unit

for a user defined time period. If the main source power has not been restored,

the Battery Supply Off command will be repeated. The loss of main power is

determined by monitoring the battery current throughput polarity.