2. OIT Installation
It is necessary to follow all installation procedures described in this chapter for
electrical noise immunity and CE compliance.
2.1. Set Jumper for Specific Protocol
This step is required for a few protocols only. Consult the Protocol Guides in your
documentation. If the protocol requires RS-485 half-duplex 3-wire
communication, proceed as follows:
STEPS
1. Remove the protective cover from the rear of the unit.
CAUTION:
When the rear cover is removed, the circuitry inside is exposed to
possible damage by electrostatic discharge. Refer to Static Awareness on page 4.
2. Locate jumper “JP4” using Figure 3 as a guide. The jumper is installed on
the lower two pins of a 3-pin header. This is called Position “A”.
3. Move the jumper to the upper two pins of the 3-pin header (Position “B”).
Ensure that the jumper is pressed fully into place.
4. Replace the rear cover and the six retaining screws.
2.2. Prepare Panel for OIT Mounting
The OIT3200 and OIT3250 are mounted to a control panel from the front. For a
proper NEMA 4/12 seal, you will need a panel with a minimum thickness of
16-gauge (0.059 inches; 1.5 mm) steel or 10-gauge (0.102 inches; 2.6 mm)
aluminum. Thinner panels may bow between the mounting studs requiring the use
of a stiffener on the rear. Two gaskets on the inside rim of the OIT’s bezel provide
an environmental seal to NEMA 4/12.
8
OIT3200/3250
1010-0081A, REV 04
JP4
B
A
JP4
A
B
Position "A",
A
Position "B",
B
Half-Duplex 3-Wire
Normal
(CPU Board)
(Display)
(Key Board)
RS485
Figure 3 OIT3200/3250 Jumper Installation
