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Electrical Power Connection and Interfacing

MAN0984_Iss 4_01/19 Touchpoint Plus

Pt. No. 3011M5001 32 Technical Handbook

5.1.2 DC Power Supply

It is possible to power the Touchpoint Plus controller directly from a DC 18 32 V supply without using AC supplies at

all. However, batteries used alone may quickly drop below the minimum DC 18 V requirement when under load.

Note: The system must still be connected to protective earth (ground) when using an external DC supply.

Connections for DC 24 V Supply

5.1.3 Backup Battery Pack

TPPL can be fitted with a rechargeable 24 volt Lithium-Ion Battery Pack. This would normally be charged by the

SMPS, but can be charged by a separate DC 24 32 V supply. Charging could take up to 24 hours from a fully

discharged state.

Note: The backup battery requires a minimum 24 VDC input to fully charge. It has a non-replaceable 15 A over-

current protection fuse so the battery input should never exceed 32 V, 5 A.

+24 V DC In

-V DC Return

Earth (Ground)

Protective

Earth

(Ground)

System Ground Bus Bar

IMPORTANT

The battery should be charged at DC 24 32 V. The backup battery will not become fully charged and the

buffer time will be reduced if the charging supply is <24 V.

DANGER

DO NOT USE WATER to cool overheated Lithium batteries

as this can cause them to ignite violently or explode.

CAUTION

User shall switch off battery connection switch on the back plane PCB before every battery pack cable

connect and disconnect. Refer to Ch.10.7 Back up Battery Maintenance.

Honeywell Touchpoint Plus Technical Handbook

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