Honeywell HA20 Technical Manual page 33

HA20 2-Channel Controller
4 Enclosures
The HA20 controller enclosures are shown in Figures 4-1, 4-2, and
4-3. Non-metallic enclosures are not grounded by metal conduit. For
internal ground points to be grounded to earth, the TB5 – GND terminal
must have a proper earth ground connection (see
4.1 HA20PCS NEMA 4X/HA20SS NEMA 4 Steel
Enclosures
The HA20PCS (painted carbon steel) and HA20SS (stainless steel)
enclosures are shown in Figure 4.1.
Instrument
Viewing Window
Single 1/4 Turn Latch
Side View
6.20
2.70
0.0 2.40 4.12 5.84 7.56
Figure 4-1. NEMA Painted Carbon Steel or Stainless Steel Enclosure
HA20 Technical Manual
Figure
9.84
8.84
2.56
C L
11.81 12.90 13.65
Front View
1/2 in. NPTConduit Fittings
(Typical 4 places)
Notes:
Material
Part#1000-2377 316 Stainless Steel
Part#1000-2378 Painted Carbon Steel
Bottom View
4.2 HA20PY NEMA 4X Polycarbonate
Enclosure
CAUTION
3-2).
Nonmetallic enclosures do not provide grounding between conduit
connections. Use grounding type bushings and jumper wires. All field wiring
must have insulation suitable for at least 250V.
The HA20PY polycarbonate enclosure is shown in Figure 4.2.
4-2
Figure 4-2. NEMA Polycarbonate Enclosure