INM 5500 Rev 11
5
3 .2 .2 Wiring up isolators
Each unit is supplied with the appropriate number and type of safe- and hazardous-area connectors
(see Figure 3.4), as dictated by the terminals used and the type of power supply.
Figure 3 .4: Removable power and signal plugs
Note
: Earth Leakage Detection requires the use of hazardous area connector type HAZ1-3,
which may need to be ordered separately. See datasheet for ordering information.
Loop-powered devices do not require power connectors. Depending on the installation, it may
be easier to wire up isolators with power and signal plugs either in place or removed. Either
way, allow sufficient free cable to permit plugs to be removed easily for future maintenance
and/or replacement purposes. See Section 6 for instructions on wiring individual modules.
3 .2 .2 .1
Signal and power conductors
Removable signal and power plugs are fitted with screw clamp terminals. Note that the
conductors should be between 14 and 24 AWG (1.6 and 0.5mm diam.) in size. Signal plugs,
located on top of the modules, are mechanically keyed to fit in only one position. They are
coloured grey, for safe-area connections, and blue, for hazardous-area connections.
For externally powered units, a power plug slots into the socket at terminals 13 and 14 on the
safe-area side of each module. The socket is coloured black if the unit is dc powered. Power
plugs are coloured grey, for plugging into the black sockets of dc powered units.
3 .2 .2 .2
Making connections
a) Trim back the insulation of conductors by 12mm.
b) Check the terminal assignments shown in section 6 or on the side label of the unit.
c) Insert conductors according to the terminal assignments and tighten screws.
If the wires are to be fitted with crimp ferrules, the following is a list of those recommended with
required trim lengths for each:
Plug
type
Entry
Wire size
(mm
2
)
Metal tube
length (mm)
Trim
length
Recommended ferrules
Signal
Single
0.75
12
14
Weidmuller 902591
Signal
Single
1.0
12
14
Cembre PKC112
Signal
Single
1.0
12
14
Phoenix Contact
AI 1-12 RD (3200674)
Signal
Single
1.5
12
14
Cembre PKE1518†
Signal
Single
2.5
12
14
Cembre PKE2518†
Power
Twin
2x0.75
10
12
Cembre PKET7510
Power
Twin
2x0.75
10
12
AMP (non-preferred) 966144-5
Power
Twin
2x1.0
10
12
Phoenix Contact AI-TWIN 2X 1-10 RD
Power
Single
0.75
10
12
AMP 966067-0
Power
Single
1.0
10
12
Phoenix Contact AI 1-10 RD
TABLE 3 .1: Crimp Ferule Options
† These ferrules with 18mm length metal tubes should be cut to 12mm after crimping
Note
: Smaller section wire than that stated can often be successfully used if the crimping is good.
Crimp tool
: Phoenix Contact Crimpfox UD6 part number 1204436
Power Plugs
Grey: dc supplies (PWR5000)
Signal Plugs
Grey: safe-area side
Blue: hazardous-area side
12mm
trim
length
with ferrule
see table below
