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CONNECTIONS
Relay Connections
Two groups (GROUP 1 and GROUP 2) of four 12-pin
connectors are provided on the rear panel. Each group
provides connection for double pole relays. The two groups
provide 32 pairs of relay closures. Relay contact ratings are
24 VAC, 0.6 A resistive load, 2 Amp, 30VDC. Power
through the relays is not supplied by the 2033.
SELECT
ON
GROUP 1
OFF
ABCDEF
PWR
ON
OFF
DATA
ABCDEF
ON
GROUP 2
OFF
ABCDEF
ON
OFF
ABCDEF
The relay connections to the unit must be made with shielded,
2-wire twisted pair (22 AWG or heavier gauge wire or
equivalent). The shield wire is to be connected to the
grounding terminal.
Each connector is labeled with a relay number, from 1
through 32, an A, a B, and a ground symbol. The A and B
on each connector are the contacts for one side of each double
pole relay. The ground pin is provided for shielding.
1
2
3
4
5
A
B
A
B
A
B
A
B
A
B
A
17
18
19
20
21
A
B
A
B
A
B
A
B
A
B
A
B W S
A
B
A
B
A
Figure 2 - Typical 12-Pin Connector
For ease of attaching to external equipment, each connector is
supplied with a mating screw terminal connector, Insert the
three wires of a relay pair and shield into the slots of the rear
panel mating connectors and tighten the hold-down screws.
When all lines have been connected, insert the 12-pin
connectors into the rear panel mating terminals. See Figure 2.
Group 1
6
7
8
9
10
11
B
A
B
A
B
A
B
A
B
A
B
22
23
24
25
26
27
B
A
B
A
B
A
B
A
B
A
B
Group 2
The lower right connector on the rear of the of the 2033
contains the common input and output connections for each
group. The four sections of the connector are labeled with the
group number G1 IN, G1 OUT, G2 IN, and G2 OUT, an A,
B, and ground. These connections are provided for easy
cascading to additional 2033's.
HOLD DOWN SCREWS
B
A
B
5
CONNECTIONS
12
13
14
15
16
A
B
A
B
A
B
A
B
A
B
28
29
30
31
32
A
B
A
B
A
B
A
B
A
B
G1 IN G1 OUT G2 IN G2 OUT
A
B
A
B
A
B
A
B
DATA LINE
IN
1
OUT
120V
60Hz
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