Toshiba 1500 SERIES operation manual DB25 Connector Pinout, Pin Symbol Description

TOSHIBA

6.0UPS Control Interface

6.1DB25 Connector Pinout

RS-232C serial communication and Dry Contacts are both standard features available through a DB25 female connector located on the back panel of the UPS (see Section 9.1). The RS-232C serial communication interface allows control of the UPS from a personal computer running special Toshiba software. The computer is connected to the UPS through a serial RS-232C communication port. The Dry Contact interface is available as open or closed contacts. An adapter is available from Toshiba for splitting the RS-232C and Dry Contact interfaces into two separate DB9 connectors. Contact Toshiba for more information on this option. The following chart shows the pin assignments for the DB25 connector.

RS-232C Serial Interface

Dry Contacts

Pin	Symbol	Description
1	0V	Supply used by Slide-In Options cards (-)
2	+9V	Supply used by Slide-In Options cards (+)
3	RXD_UPS	UPS receive line
4	TXD_UPS	UPS transmit line
5	TXD_AUX	Auxiliary transmit line
6	RXD_AUX	Auxiliary receive line
7		(not used)
8	SNMPSIG1	SNMP option card function
9	RS_Common	Common line for RS-232C communication
10	SNMPSIG2	SNMP option card function
11	DTR	UPS data terminal ready
12	DSR	UPS data set ready
13	RTS	UPS request to send
14	CTS	UPS clear to send
15		(not used)
16	Dry_Common	Common line for Dry Contact signals
17	Backup_O	Open during Battery Backup
18	Backup_C	Closed during Battery Backup
19	Low_Battery	Closed during Low Battery
20	Inverter	Closed during On-Line mode
21	Bypass	Closed during Bypass mode
22	Fault	Closed during Fault
23		(not used)
24	SD_Signal	Shutdown command signal line
25	SD_Common	Shutdown command common line

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