General Information:
FIGURE 3
Switch Configurations:
The Model 220 indicating / non-indicating differential
pressure switch is configured with one of the outputs
identified in the table below.
OUTPUT RATINGS (Resistive Load)
Type
SPST
SPDT
SPDT
DPDT
Relay
ELEC
Spec.
A A A B,C,D,E,F,
G, H
Output
Option Code
E, F, or G
H
A
R
*Power
60 W
60 W
3W
N/A
Max. Current 3 Amps
1.0 Amps
0.25 Amps
10 Amps
Max. Volts
VAC/ VDC
240 240 125
277
/
30
Setting
(F.S.)
15% to 90% 25% to 90% 10% to 90% 15% to 90%
Hysteresis
(Max/Nom)
20% / 9%
Full
Scale(F.S.)
20% / 18%
Full
Scale(F.S.)
10% / 6%
Full
Scale(F.S.)
20% / 10%
Full
Scale(F.S.)
Repeatability 1% F.S.
1% F.S.
1% F.S.
1% F.S.
Table I
* Product of the switching voltage and current shall not
exceed the power rating of the device.
Hermetically Sealed Switch Outputs:
Electrical Specification Input Option “A” identifies that your
unit does not need input power to operate the switch output
and that your unit is equipped with Hermetically Sealed Reed
switches. The “A” option matched with Output Options A, E,
F, G, & H identifies the output capability of your unit.
Depending on the electrical configuration specified on the
order (A, B, J, or K), your unit will be equipped with 1 or 2
independently adjustable reed switches.
Interface to the 16 position terminal strip shown in Figure 1 is
defined in Table II.
Terminal Connections
Electrical
Options
Qty
Sw.
Function
Switch Adjust
Low Port
Switch Adjust
Hi Port
AAA, JAA,
AAH, JAH
1 SPDT
1(COM), 2(NO),
3 (NC)
No Connection
BAA, KAA,
BAH, KAH
2 SPDT
1(COM), 2(NO)
3 (NC)
8(COM), 7(NO)
6 (NC)
AAE, JAE
1
SPST
NO
1,2 No
Connection
AAF, JAF
1
SPST
NC
1,3 No
Connection
BAE, KAE
2
SPST
NO
1,2 8,7
BAF, KAF
2
SPST
NC
1,3 8,6
BAG, KAG
2
SPST 1
NO, 1NC
1, 3 NC
8, 7 NO
Table II
Chassis connection is to position 13
Customer Interface for the Reed Switch Output Option will be
via connections 1 through 8 and connections 12. Do not
loosen the connections at positions 9, 10, 11, 13 14, 15 , or
16.
Figure 4: Reed Switch Terminal Strip Output Interface
Customer
Interface
Low
Port
High
Port
