Power & Communication Interface

Overview

The C-Series Modem Power & Communication Interface consists of a single wet-mate bulkhead connector available to provide power, communicate via Ethernet at 10/100 Mbps, RS-232, and/or RS-422 full-duplex, and provide a 1PPS time-sync input to the modem.

Electrical Connections

The figure below shows the electrical connections for the Power & Communication Interface. All signal directions are relative to the C-Series Modem.

Connector face view

This is the face view of the male connector as mounted to all C1500RP and C3500RP variations. C1500LI-00 has a female connector, and the pinout will appear mirror-imaged.

Connector pinout, male pins, face view.

Power & Communication Interface Electrical Pinout

Pin Number	I/O	Pin Name	Notes
1	P	LED Power	+3.3 V out when unit is powered up
2	O	RS-422 TX+	RS-422 transmit positive
3	O	RS-422 TX-	RS-422 transmit negative
4	I	RS-422 RX+	RS-422 receive positive
5	I	RS-422 RX-	Low-side relay driver output
6	I	Power Switch	Short to GND to power down unit. Leave open for normal operation.
7	P	GND	Communication interfaces GND, electrically connected to pin 15
8	O	ENET_DP0_P	T568A: green & white T568B: orange & white
9	O	ENET_DP0_N	T568A: green T568B: orange
10	I	ENET_DP1_P	T568A: orange & white T568B: green & white
11	I	ENET_DP1_N	T568A: orange T568B: green
12	O	RS-232 TX	RS-232 transmit
13	I	RS-232 RX	RS-232 receive
14	I	1PPS Input	Used for 1PPS or general-purpose digital input. +1.8 V to +5 V logic level.
15	P	GND	Power input ground, electrically connected to pin 7
16	P	VIN	C1500LI-00: charger input, LIC-77WH-00: 25.5 V C1500RP/C3500RP: power input, 12-38 V, nominal 24 V

C1500LI-00 Connector Hardware Components

The C1500LI-00 Power & Communication Interface connector is a MacArtney SubConn Micro Circular 16-pin female aluminum bulkhead connector, P/N MCBH16FAS, and female locking sleeve, P/N DLSA-F BLUE.

The Power & Communication Interface is connected using a MacArtney SubConn Micro Circular 16-pin male inline cable, P/N MCIL16M, and male locking sleeve, P/N DLSA-M BLUE. The C1500LI-00 comes with a power-down plug mounted, which keeps pins 6 and 7 shorted and the modem powered down. The install kit for C1500LI-00 also includes an inline cable adapter, Popoto PDI board, battery charger, and dummy plug for easy interfacing with the modem.

C1500RP/C3500RP Connector Hardware Components

The C1500RP/C3500RP Power & Communication Interface connector is a MacArtney SubConn Micro Circular 16-pin male aluminum bulkhead connector, P/N MCBH16MAS, and male locking sleeve, P/N DLSA-M BLUE.

The Power & Communication Interface is connected using a SubConn Micro Circular 16-pin female inline cable, P/N MCIL16F, and female locking sleeve, P/N DLSA-F BLUE. Both are included in the C1500RP/C3500RP install kit.

Mating Cable Notes

Connector handling

Connectors must be greased with MOLYKOTE 44 Medium before every mating.

• Disconnect by pulling straight out, not at an angle.
• Do not pull on the cable and avoid sharp bends at cable entry.
• Ensure that there are no angular loads on the bulkhead connector.
• SubConn connectors should not be exposed to extended periods of heat or direct sunlight. If a connector becomes very dry, soak it in fresh water before use.
• The locking sleeve must be hand-tightened only.
• If using RS-422, mating cables should use twisted-pair wiring for pins 2/3 and 4/5.
• If using Ethernet, mating cables should use twisted-pair wiring, ideally 100 ohm differential impedance, for pins 8/9 and 10/11.
• If using alternate vendors for cabling, the color code may differ. Refer to the connector pinout above for pin and signal locations, and verify with a digital multimeter before terminating.

Popoto SubConn Inline Cable Color Code

Pin Number	Wire Color
1	Red
2	Red/White
3	Black
4	Black/White
5	Yellow
6	Yellow/White
7	Blue
8	Blue/White
9	Orange
10	Orange/White
11	Brown
12	Brown/White
13	Grey
14	Grey/White
15	Green
16	Green/White

MacArtney SubConn Inline Cable Color Code

Pin Number	Wire Color
1	Black
2	White
3	Red
4	Green
5	Orange
6	Blue
7	White/Black
8	Red/Black
9	Green/Black
10	Orange/Black
11	Blue/Black
12	Black/White
13	Red/White
14	Green/White
15	Blue/White
16	Black/Red