Campbell SDM-CD16AC Specifications Page 7

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1
SDM-CD16AC 16 Channel AC/DC
Controller
0
1
2
3
0
1
2
3
ADDRESSES
G
ND
C1
C
2
C3
+12V
A
U
T
O
O
N
O
F
F
1
6
1
5
1
4
1
3
1
2
11
1
0
9
8
7
6
5
4
3
2
1
AUTO
ON
O
F
F
C2
C2
C2
16
C2
C2
C2
16
C2
C2
C2
16
C
2
C
2
C
2
1
6
C2
C2
C2
16
C2
C2
C2
16
C
2
C
2
C
2
1
6
C
2
C
2
C
2
1
6
C
2
C
2
C
2
1
6
C
2
C
2
C
2
1
6
C2
C2
C2
16
C
2
C
2
C
2
1
6
C
2
C
2
C
2
1
6
C
2
C
2
C
2
1
6
C
2
C
2
C
2
1
6
C
2
C
2
C
2
1
6
Logan, Utah
SDCD16AC
16 CHANNEL AC/DC CONTROLLER
IN
P
U
T
:
1
2
V
D
C
L
O
A
D
:
5
A
2
7
7
V
A
C
1
/6
H
P
5
A
1
2
5
V
A
C
1
/1
0
H
P
M
A
D
E
IN
U
S
A
S
/N
:
L
IS
T
E
D
IN
D
U
S
T
R
IA
L
C
O
N
T
R
O
L
E
Q
U
IP
M
R
N
T
5
Z
2
1
FIGURE 1. SDM-CD16AC Face Panel
1. Function
The SDM-CD16AC has 16 AC/DC relay control ports and is compatible with
CSI's CR10, 21X and CR7 dataloggers (see Figure 1). Each relay port can be
controlled by a datalogger or controlled manually with a manual override toggle
switch.
The toggle switch has three positions; "ON" and "OFF" for manual override,
and "AUTO" for datalogger control. In the "ON" position, the common
(COM) and normally open (NO) contacts are closed (see Figure 2). In the
"AUTO" position, the state of the relays are controlled by the datalogger
control ports.
The SDM-CD16AC is a synchronously addressed datalogger peripheral.
Datalogger control ports 1, 2, and 3 are used to address the SDM-CD16AC,
then clock out the desired state of each of the 16 control ports. Up to 16 SDM-
CD16ACs may be addressed, making it possible to control a maximum of 256
ports from the first three datalogger control ports.
I/O Instruction 104 is used by the 21X and CR10 to control the SDM-
CD16AC. The CR7 uses Instruction 29.
Ensure that the datalogger contains the appropriate instruction
prior to system deployment.
NOTE
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