Rockwell Automation 1440-REX00-04RD XM-441 Expansion Relay Module User Manual
Page 23
Rockwell Automation Publication GMSI10-UM019C-EN-P - June 2011
Installing the XM-441 Expansion Relay Module 23
There are four double pole double throw relays in the XM-441. All relay
contacts (24 total) are available for wiring at the terminal base unit, as shown in
Table 2.1 on the page 23.
Figures 2.6 and 2.7 illustrate the behavior of the NC and NO terminals when
the relay is wired for failsafe, alarm or nonalarm condition or non-failsafe,
alarm or nonalarm condition.
IMPORTANT
All XM relays are double pole. This means that each relay
has two contacts in which each contact operates
independently but identically. The following information
and illustrations show wiring solutions for both contacts;
although, in many applications it may be necessary to wire
only one contact.
IMPORTANT
The NC/NO terminal descriptions (pages 20–22)
correspond to a de-energized (unpowered) relay.
When the relay is configured for non-failsafe operation, the
relay is normally de-energized.
When the relay is configured for failsafe operation, the
relay is normally energized, and the behavior of the NC and
NO terminals is inverted.
Table 2.1 Relay Connections for XM-441
Configured for
Failsafe Operation
Relay 1 Terminals
Relay 2 Terminals
Relay 3 Terminals
Relay 4 Terminals
Nonalarm
Alarm
Wire Contacts
Contact 1
Contact 2 Contact 1
Contact 2
Contact 1 Contact 2 Contact 1
Contact 2
Closed Opened
COM
21
20
24
22
27
25
29
28
NO
5
4
8
6
11
9
13
12
Opened
Closed
COM 21
20
24
22
27
25
29
28
NC
39
38
42
40
45
43
47
46
Configured for
Non-failsafe Operation
Relay 1 Terminals
Relay 2 Terminals
Relay 3 Terminals
Relay 4 Terminals
Nonalarm
Alarm
Wire Contacts
Contact 1
Contact 2 Contact 1
Contact 2
Contact 1 Contact 2 Contact 1
Contact 2
Closed
Opened
COM
21
20
24
22
27
25
29
28
NC
39
38
42
40
45
43
47
46
Opened
Closed
COM
21
20
24
22
27
25
29
28
NO
5
4
8
6
11
9
13
12