
2013 Moxa Inc. All rights reserved.
P/N: 1802001016020
PTC-101-M12
Hardware Installation Guide
Moxa Industrial Media Converter
Second Edition, January 2013

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Overview
The PTC-101-M12 industrial media converter is designed to provide
reliable and stable operation in harsh industrial environments. The
PTC-101-M12 converts between 10/100BaseT(X) and 100BaseFX. To
keep your industrial automation applications running continuously, the
PTC-101-M12 comes with a relay output warning alarm to help prevent
damage to your equipment.
The PTC-101-M12 has a wide operating temperature range of -40 to 85°C,
and is designed to withstand a high degree of vibration and shock. The
rugged hardware design makes the PTC-101-M12 perfect for ensuring
that your Ethernet equipment can be used with critical industrial
applications, such as in hazardous locations. The converter complies with
FCC, UL, and CE standards.
Package Checklist
The PTC-101-M12 is shipped with the following items:
• Moxa Industrial Media Converter
• Hardware Installation Guide
• Moxa Product Warranty booklet
Note: If any of these items are missing or damaged, please contact your
customer service representative for assistance.
Features
• Supports 10/100Base-TX auto-negotiation and auto-MDI/MDI-X
• Single mode with SC or ST fiber connector available
• Supports Link Fault Pass-Through
• Power failure by relay output
• Redundant dual VDC power inputs
• -40 to 85°C operating temperature range

Terminal block for power input
3. Normal Open (NO, COM) /
Normal Close (NC, COM)
4. DIP switch
5. Power input PWR LED
6. Fiber Link/Active LED
7. 100BaseFX Port
(ST/SC connector)
8. TP port 100 Mbps LED
9. TP port 10 Mbps LED

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Dimensions
Wiring Requirements
Be sure to disconnect the power cord before installing
• Calculate the maximum possible current in each power wire
and common wire, and observe all electrical codes dictating
the maximum current allowable for each wire size.
If the current goes above the maximum ratings, the wiring
could overheat, causing serious damage to your equipment.

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You should also pay attention to the following:
• Use separate paths to route wiring for power and devices. If power
wiring and device wiring paths must cross, make sure the wires are
perpendicular at the intersection point.
Do not run signal or communications wiring and power wiring in
the same wire conduit. To avoid interference, wires with different
signal characteristics should be routed separately.
• You can use the type of signal transmitted through a wire to
determine which wires should be kept separate. The rule of thumb is
that wiring that shares similar electrical characteristics can be
bundled together.
• Keep input wiring and output wiring separated.
• It is strongly advised that you label the wiring to all devices in the
system.
Grounding the PTC-101-M12
Grounding and wire routing help limit the effects of noise due to
electromagnetic interference (EMI). Run the ground connection from the
ground screw to the grounding surface prior to connecting devices.
This product is intended to be mounted to a well
mounting surface such as a metal panel.
Wiring the Redundant Power Inputs
The top five contacts of the 8-contact terminal block connector on the
PTC-101-M12’s top panel are used for the two DC inputs. Top and front
views of one of the terminal block connectors are shown here.
STEP 1: Insert the negative/positive DC wires
into the V
To keep the DC wires from pulling
-clamp screws on the front of
the terminal block connector.
Insert the plastic terminal block
connector prongs into the terminal block
receptor, which is located on the
PT
Before connecting the PTC
-101-M12 to the DC power inputs,
make sure the voltage of the DC power source is stable.

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Communication Connections
The PTC-101-M12 has one 10/100BaseT(X) Ethernet port, and one
100BaseFX (SC or ST type connector) fiber port.
10/100BaseT(X) Ethernet Port Connection
The 10/100BaseT(X) ports located on the PTC-101-M12’s front panel are
used to connect to Ethernet-enabled devices.
Pinouts for the 10/100BaseT(X) Ports
M12 (4-pin, M) to M12 (4-pin, M) Cross-Over Cable Wiring
M12 (4-pin, M) to M12 (4-pin, M) Straight-Through Cable Wiring
Auto MDI/MDI-X Connection
The Auto MDI/MDI-X function allows users to connect PTC-101-M12’s
10/100BaseTX ports to any kind of Ethernet device, without needing to
pay attention to the type of Ethernet cable being used for the connection.
This means that you can use either a straight-through cable or cross-over
cable to connect the PTC-101-M12 to Ethernet devices.

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100BaseFX Ethernet Port Connection
The concept behind the SC port and cable is quite straightforward.
Suppose you are connecting devices I and II. Contrary to electrical signals,
optical signals do not require a circuit in order to transmit data.
Consequently, one of the optical lines is used to transmit data from device
I to device II, and the other optical line is used transmit data from device
II to device I, for full-duplex transmission.
All you need to remember is to connect the Tx (transmit) port of device I
to the Rx (receive) port of device II, and the Rx (receive) port of device I
to the Tx (transmit) port of device II. If you are making your own cable,
we suggest labeling the two sides of the same line with the same letter
(A-to-A and B-to-B, as shown below, or A1-to-A2 and B1-to-B2).
SC-Port to SC-Port Cable Wiring
ST-Port to ST-Port Cable Wiring
Redundant Power Inputs
The PTC-101-M12 has two power inputs, which can be connected
simultaneously to live DC power sources. If one power source fails, the
other live source acts as a backup, and automatically supplies all of the
PTC-101-M12’s power needs.

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DIP Switch Settings
“Auto Negotiation” function. The speed and duplex
states for each port link segment are automatically configured
using the highest performance interoperation mode.
Disables the “Auto Negotiation” function. The speed and duplex
states depend on the
manual setting configuration.
(Only when Auto Negotiation is disabled)
Forces the Ethernet port to use 100 Mbps transmission.
Forces the Ethernet port to use 10 Mbps transmission.
(Only when Auto Negotiation is disabled)
Forces the Ethernet port to use Full Duplex.
Forces the Ethernet port to use Half Duplex.
Enables “Link Fault Pass Through.” The link status on the TX port
will inform the FX port of the same device and vice versa.
Disables “Link Fault Pass Through.” The link status on the TX port
will not inform the FX port.
Forward” mode. Begins to forward a packets
to a destination port after an entire packet is received. The latency
depends on the packet length.
Selects “Pass Through” mode. Operates with the minimum
latency. Both transceivers are
interconnected via internal MIIs
and the internal switch engine and data buffer are not used.
With “Pass Through” mode enabled, the Ethernet port and fiber
port should transmit at 100 Mbps, which is equivalent to full
duplex mode.
Default DIP settings are all in the ON position.
After changing the DIP switch setting, you will need to power off
and then power on the PTC-101-M12 to activate the new setting.

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LED Indicators
The front panel of the PTC-101-M12 has several LED indicators. The
function of each LED is described in the table below.
Power is being supplied to power
input PWR1.
Power is not being supplied to
power input PWR1.
Power is being supplied to power
input PWR2.
Power is not being supplied to power
input PWR2.
Blinking
Data is being transmitted or
10 Mbps Ethernet port link is active.
Blinking
Data is being transmitted at
10 Mbps Ethernet port link is
inactive.
100 Mbps Ethernet port is active.
Data is being transmitted at
100 Mbps.
100 Mbps Ethernet port link is
inactive.
IEEE 802.3u for 100BaseT(X), 100BaseFX
100BaseFX (SC/ST connectors)
PWR1, PWR2, Fiber Link, 10/100M (TP port)
Note: Default DIP settings are in the ON position.
One relay output with current carrying
capacity of 1 A @ 24 VDC

Optical Fiber: 100BaseFX, Single-mode
* 9/125 μm, 3.5 PS/(nm*km) fiber optic cable
1.6 A (protects against two signals shorted
Reverse Polarity
Protection
112 x 145 x 67 mm (4.40 x 5.70 x 2.63 in)
-40 to 85°C (-40 to 185°F)
-40 to 85°C (-40 to 185°F)
5 to 90% (non-condensing)
FCC Part 15, CISPR (EN55022) class A
EMS EN 61000-4-2, Level 4
EN 61000-4-3, Level 3
EN 61000-4-4, Level 4
EN 61000-4-5, Level 4
EN 61000-4-6, Level 3
EN 61000-4-8, Level 5
EN 61000-4-11, Criteria B
See www.moxa.com/warranty

Technical Support Contact Information
www.moxa.com/support
Moxa China (Shanghai office):
Toll
+49-89-3 70 03 99-99
Moxa Asia-Pacific:
Tel: