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Innovative High Temperature Fiber Optic Infrared Pyrometers
Installation
27
5.5. Electrical Installation of the Electronics Housing
The Endurance
®
-Series pyrometers with fiber optic attached sensor head are available in two
different variants:

The first standard electronics housing variant is equipped with two IP67 protected
connector sockets. A big M16-metric thread 12-pin DIN connector houses a half duplex
RS485 interface, trigger input, relay contact, current loop input, current loop output and 24V
power supply lines. The second one, a small M12-metric thread 4-socket connector houses
a 100Mbit/s LAN/Ethernet link with integrated Power over Ethernet (PoE) capability.

The second standard electronics housing variant is equipped with a cable gland/grommet
instead of the big standard M16 connector, to feed in the customer specific process wiring.
To preserve the IP67 protection class for the squeezed cable through the cable gland, the
outer cable diameter has to be in the range of 6.5mm to 9.0mm. Only the cable gland
variant with the customer specific wiring allows to run the device in a full duplex RS485
mode. To use the full duplex RS485 capability and all Endurance
®
interface lines via the
customer specific cable gland wiring, you need at least a shielded cable with 14 single
wires. Be aware, that the two RS485 wire pairs should be arranged as twisted pairs, to
minimize electrical impacts.
Endurance
®
-Series pyrometer are able to communicate via both integrated interfaces
(LAN/Ethernet & RS485) simultaneously. Please keep in mind, if doing this, that data corruption
or inconsisty may occur.
The distance between the electronics housing and a computer (via RS485 cable) can be up to
1200 m (4000 feet). This allows ample distance from the harsh environment where the
sensing head is mounted to a control room or pulpit where the computer is located.
To power the electronics housing by 24VDC, you can either use an external 24VDC power
supply, attached to the 12-wire M16 cable or the PoE (Power over Ethernet) capability, where
the power is injected over the 4-wire Ethernet cable (M 12) by a PoE-injector. The standard
12-wire cable is used to wire all analog/digital inputs and outputs of the electronics housing.
For reliable performance it is recommended that the power supply be no
more than 60 m (200 feet) away!
The complete wiring must have only one common earth ground point!
5.5.1. Standard (1) electronics housing variant with M16 and M12 connector
Figure 13: Standard electronics housing with M16 and M12 connector on left side
M16
M12