Honeywell EXCEL 5000 OPEN SYSTEM XFL521B Product Data page 8

DISTRIBUTED I/O
Relay Modules MCD 3 and MCE 3
The relay modules facilitate the control of peripheral devices
with high load via the analog outputs. Figure 4 and Figure 5
present connection examples for the relay modules MCD 3
and MCE 3, respectively.
FUSE
230 Vac / 120 Vac
1112131415161718
MCD 3
K1 2 K3
1 2 3 4 5 6 7 8
L N
Figure 4. Analog Outputs, Connection of Relay MCD 3.
MCD 3
Relay terminal 17 controls the changeover contact K3. Relay
terminal 18 controls the ON contacts K1, K2. Ground can be
looped through terminals 2/3.
EN0B-0090
AO1
18
AO2
19
AO3
20
AO4
21
0.2 A 3 A
K 1 K 3
K 2
FUSE
230 Vac / 120 Vac
11 12 13 14 15 16 17 18
MCE 3
K2 K3
K1
1 2 3 4 5 6 7 8
Figure 5. Analog Outputs, Connection of Relay MCE 3.
MCE 3
Relay terminal 16 controls the ON contact K3. Relay terminal
17 controls the changeover contact K2. Relay terminal 18
controls the changeover contact K1.
Power Supply
Several relay modules can be connected in series via the
bridged terminal pair:
24 Vac: Terminals 11/12 of the relay
24 Vac (-): Terminals 13 to 16 of the relay
8
AO1
18
AO2
19
AO3
20
AO4
21
0.2 A 2 A
K 1
K 2
K 3