Cimt2 Installation Instruction: Engineering Bulletin
Cimt2 Installation Instruction: Engineering Bulletin
Cimt2 Installation Instruction: Engineering Bulletin
Engineering Bulletin
CIMT2
Installation Instruction
MileGate
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Content
CIMT2 - Cable Impedance Matching Transformer 2-Pair 5
CIMT2 - Characteristics 5
Prerequisites 7
Installation 7
Warnings
Danger by overvoltage.
During faults unprotected voltages may occur that are dangerous to per-
Caution sons.
£ Take care for sufficient grounding of the housings, i.e. by connecting
the grounding contact.
2-Pair
CIMT2 - Characteristics
Characteristics Remark
Installation on a top-hat rail
Article number of the device 37971506
Copper pairs 1 ... 2
Power supply none - passive component
Temperature range - 40 to +85 °C
Relative humidity 0 to 98% non-condensing
MTBF > 75 years
Impedance matching 1: 1.13 (e.g. 135 ohms to 174 ohms) (from in to out)
CIMT2 - Characteristics
Characteristics Remark
Dimensions h * w * d (mm) 96 * 38 * 48
Voltage range 0 to 160 VDC
maximum wire diameter 2.26 mm (4 mm²)
First line
IN1 OUT1
IN2 OUT2
Second line
Fig. 2: Jacks to CIMT2 with first and second line pair.
Contacts
Jack Purpose
In 1 1. Copper pair for connection to the local terminal device - the impedance
of this wire is too low. This jack is connected to jack Out 1.
In 2 2. Copper pair for connection to the local terminal device - the impedance
of this wire is too low. This jack is connected to jack Out 2.
Out 1 1. Wire pair for connection to the remote terminal device on cables with high
impedance. This jack is connected to jack In 1.
Out 2 2. Wire pair for connection to the remote terminal device on cables with high
impedance. This jack is connected to jack In 2.
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MileGate - CIMT2 Engineering Bulletin EN/LZTBU 881 105 RA | 2.2008
CIMT2 - Cable Impedance Matching Transformer 2-Pair © KEYMILE
Prerequisites
1.2 Prerequisites
Devices of the type CIMT2 have to be installed at the end of the transmis-
sion line with high impedance - for this reason you need two devices for
point-to-point connections.
Devices of the type CIMT2 require a mounting rack with top-head rails or a
suitable mechanical adapter.
You need the following materials:
Required materials
Material Purpose
Top-hat rail CIMT2 can only be fixed reliably on top-hat rails. Other instal-
lation locations are not permitted
CIMT2 One unit of the type CIMT2 is required for each two copper
pairs.
It is allowed to connect only one copper pair.
If you connect only one copper pair the other pair of connec-
tors may be employed for the copper pair of a further device.
Transmission line to This transmission line can be maximum copper pair. The
the local terminal impedance of this line is nominal 135 ohms
device
Transmission line to This transmission line can be maximum one copper pair. The
the remote terminal impedance of this line is nominal 174 ohms
device
Slotted screwdriver To unfix and fix the screws in the screw terminals at the
3 mm device.
Stripper To skin the ends of the transmission lines if necessary.
Wire cutter To reduce the transmission line if necessary.
Planning documents Show the transmission lines affected and which copper pairs
belong to a transmission line.
Isolation material To insulate free cable ends during working steps in order to
prevent short voltages.
1.3 Installation
Proceed as follows:
1. Affix CIMT2 on hat rail.
2. Repeat for each of the connectors:
3. Remove isolation from transmission line.
4. Insert wire with low impedance into In 1 and the other in In 2.
5. Tighten screws.
6. Insert wire with high impedance into Out 1 and the other in Out 2.
7. Tighten screws.
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MileGate - CIMT2 Engineering Bulletin EN/LZTBU 881 105 RA | 2.2008