Large Display Temperature Meters
Instruction Manual
22
Wiring Instructions
For connector locations, refer to:
Figure 31 on page 61 for PD755
Figure 32 on page 62 for PD756
Figure 33 on page 62 for PD757
1. All field connections to be made with insulated copper wire, either solid or
stranded. Tighten all screw terminals to 4.5 lb-in (0.5 Nm).
Strip length = ¼ in (7 mm).
DO NOT
pre-treat wire with solder.
2.
Terminals L1(V+), L2(V-) on J2, Main PCB, Earth Ground, and terminals
1-6 on J3-J4, Options PCB:
Use AWG #12-18 wire, 600 volt, 60
°
C.
Connect only one wire to each terminal.
3.
Terminals EN, AK, H, CM, P-, P+, EX, +, –, on J1 Main PCB and
ter, - on Options PCB:
Use AWG #12-22 wire, 150 volt, 60
°
C. If
using AWG #20 or smaller wire, up to two wires may be connected to each
terminal. If using AWG #18 or larger wire, only one wire may be connected to
each terminal.
4. Install conduit hubs to the enclosure cable input ports. To maintain NEMA 4X
rating use only UL/CSA watertight conduit hubs.
5. Feed all wires through the enclosure cable input ports.
6. Remove one connector at a time from the headers and connect the wires to
the connector.
7. After wiring a connector, insert it back into the header.
Terminals Designation
Terminal Description
Terminal Description
L1, L2, Gnd
AC input power
P+, P-
24 VDC supply
V+, V-
DC input power
EX
Excitation for RTD
EN
External Enter
+, -
(Main PCB)
TC & RTD input
AK External
relay
acknowledge
+, -
(Options PCB)
4-20 mA output
(see page 27)
H Hold
reading
1-6
(Option PCB)
Relays 1-4
(see page 27)
CM
Common (return) for
AK, EN, & H
