Page 2
/ Bulletin 100-50-2
The
IB Series
interface boards have been developed as economi-
cal compliments to the TCB temperature control boards. The
IB Series
is available in five basic models, IB1, IB2, IB3, IB6,
and IB ESX and each can accept 4-20 milliamp or 0-10 volt DC
analog input signals. All are designed to allow externally sup-
plied control signals to control one or two Sporlan step motor
valves including CDS evaporator control valves, SDR electric
discharge bypass valves, and SEI/SER/SEH/ESX electric expan-
sion valves.
Figure 1
IB 1,2,3,6
The IB ESX is specifically programmed to control the ESX fam-
ily of valves. The IB1 is programmed to control any Sporlan step
motor valve having 1596 steps of resolution, the IB2 is used with
valves having 2500 steps, the IB3 is used with valves having
3193 steps and the IB6 is used on valves with 6386 steps. “Q”
denotes quick response for special applications. Please contact
Sporlan Division. Refer to Ordering Information, page 3.
CONFIGURE THE BOARD
When used with a 0-10 volt input signal, a jumper should be
placed on the pins labeled CN3 as shown in Figure 1. This is
the default jumper position. The impedance for this input is 40k
ohms.
When used with a 4-20 milliamp input, the board must be
matched to the impedance of the external controller. Refer to the
manufacturer’s literature and choose the jumper position on CN4
as shown in Figure 1. Possible impedance selections on CN4 are
1,000 ohms (1k), 600 ohms, and 300 ohms.
Choose “Open on Rise” or “Close on Rise” operation using the
middle two pins on jumper CN2. The jumper is stored on one
pin only and will cause the valve to open as input signal rises,
i.e. valve is closed at 0 volts or 4 milliamps and fully open at 10
volts or 20 milliamp input. By placing the jumper on both pins,
the operation is reversed so that the valve will be fully open at 0
volts or 4 milliamps. Other pins on CN2 have been clipped at the
factory and are not used for operation of the valve.
MOUNT THE BOARD
The
IB Series
is based on a 3.0” x 3.0” circuit card with 0.125”
mounting holes, 0.25” from each corner. If desired, these mount-
ing holes may be used with customer supplied non-metallic
standoffs. The
IB Series
does, however, come supplied with a
length of snap-in plastic track. The track should be mounted in
the desired location and one side of the IB engaged in the upper
groove in the track. The IB is then pushed down so that the
opposite side of the board snaps into the uppermost groove in
the opposite side of the track. The board must be mounted in the
orientation shown in Figure 1. Location should be dry, protected
and close to the 24 volt power supply and external controller.
WIRING INSTRUCTIONS & CAUTIONS
Use the chart as a guide for wire connections. Certain precau-
tions must be taken in wiring and operation of the
IB Series
.
1. The 24 volts must be supplied by a 30 VA or 40 VA transform-
er (depending on the valve type and number of valves per IB)
not used for any other purpose. In addition, the secondary
winding of the transformer must not be connected to chassis
ground. A single transformer may be used for multiple IB
boards. If this feature is used, one leg of the 24 volt supply
must be connected to all of the IB boards at the 24+ termi-
nal. The other leg of the 24 volt supply must be connected to
all of the IBs at the 24- terminal.
Please refer to Figure 2.
Incorrect wiring will cause the fuse to fail, a spare fuse is
included and may be replaced with any 1 amp 250 volts
delay fuse type GMC1 or equivalent. Wiring should be cor-
rected before replacing the fuse.
CN2
CN4
CN3
+4-20
-4-20
Black
White
Green
Red
IN
GND
24V+
24V-
Snap Track
CN2
CN4
CN3
IB ESX
+4-20
-4-20
Orange
Red
Yellow
Black
IN
Grey
24V+
24V-
Snap Track
