ALARM-24 Series User Manual P/N 821542 Rev-A
14
© 2003 Wohler Technologies Inc. ALL rights reserved
Rear Panel Features
Section 2: Operation
(Continued)
Pin#
1
2
3
4
Function
DCD
8
9
7
5
6
Rx Data
Tx Data
DTR
Ground
DSR
RTS
CTS
Not Used
RS232 Serial Control DB-9 Pinout (DCE)
Note:
Pins 1, 4, and 6 are linked and pins
7 and 8 are linked.
E
F
G
H
Option Select Switch
This 10-position BCD rotary switch is used to set operation of the unit. It can be accessed using a small flathead screwdriver
or similar tool. Set to
position 3
for
normal
operation. See table below for settings.
Note:
For
position 2,
see page 17 (
Wohler Alarm Profile Editor Installation and Operation: Equipment hookup and
Data Download
) for instructions for downloading alarm threshold settings.
Port 1 Connector
This DB-25 connector (Port 1) is used to convey alarm conditions to outboard equipment. This port has isolated contact
closures which indicate Alarm conditions for the assiciated channel pairs. These contacts are normally open and close on
alarm.
A
summary contact pair exists between
pins 1
and
14
. If any relay pair in the unit closes, the summary contacts also
close.
Example:
If
channel 15
or
16
trips into alarm, a contact closure will occur between
pins 9
and
21
for the duration of
the alarm.
Serial Control Connector
This connector is used for
Remote Control
and for software upgrades of the product. See page 20 (
RS232 Status and
Control
) for more information about this connector. See table below for pinout information.
Power Input Connector
Attach a standard IEC-320 power cord between this connector and mains power (100 - 240VAC nominal, 50/60 Hz). The
front panel
Power Indication LED
(
Item 6
, page 10) will glow GREEN to indicate operating voltages are present.
CH 3-4 A
3
9
8
7
6
5
4
CH 9-10 A
CH 7-8 A
CH 5-6 A
Port 1 DB-25 Pinout
2
1
Pin#
Function
Unit Alarm A
CH 1-2 A
11
13
12
10
25
24
23
22
21
20
19
18
17
16
15
14
Unit Alarm B / CH 1-2 B
Pin#
Function
CH 11-12 A
CH 13-14 A
CH 15-16 A
CH 17-18 A
CH 19-20 A
CH 21-22 A
CH 23-24 A
CH 23-24 B
CH 21-22 B
CH 19-20 B
CH 17-18 B
CH 15-16 B
CH 13-14 B
CH 11-12 B
CH 3-4 B
CH 5-6 B
CH 7-8 B
CH 9-10 B
Alarm Threshold Download
2
8
7
6
5
4
3
Normal Operation
Position
BCD Option Rotary Switch - 10-Position
1
0
Function
Factory Only
9
Factory Only
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used