JVC VN-H257U Cables, Troubleshooting, Specifications, Audio cable connection (VN-H257U), Alarm I/O cable connection (VN-H257U)

Cables

			Cable type		Color	Signal name
1	2 3	4	1Monitor output cable (Common)		Red	AC 24 V
			2Power cable
			(VN-H257U)		Black	AC 24 V
					Red	INPUT 1 (ALARM)
			3Alarm I/O cable		Brown	INPUT 2 (ALARM)
				Black	Orange	OUTPUT 1 (ALARM)
			(VN-H257U)
					Yellow	OUTPUT 2 (ALARM)
					Black	GND (ALARM)
				Brown	White	MIC IN
			4Audio cable		Yellow	GND (MIC IN)
			(VN-H257U)	Black	White	LINE OUT
					Yellow	GND (LINE OUT)

	Troubleshooting
Symptom	Causes and Countermeasures
Images on the monitor are dark	• If you connect the monitor output (RCA terminal) inside the dome cover to the test
	monitor while the monitor output cable on the bottom is connected to video recording
	equipment or another monitor, images may be dark.
	• Disconnect the monitor output cable from the video recording equipment or another
	monitor. Alternatively, set the terminal of either one of the equipments to “OPEN”.
	• After adjusting the image, restore the original condition.
Movement of network image is not	• If the monitor image output is turned ON, a lower frame rate is set for network images.
smooth	• If you turned the monitor image output to OFF, set the frame rate again.
	(☞ “Instructios (Setting)” - “Internet Explorer Setting” - “Encoding Page”)
No monitor image is output.	The image output may be turned Off on Internet Explorer.
	Check the monitor output setting.
The external mic sound is not heard.	• Check the MIC connection.
	• Is the audio setting turned off? (☞ “Instructions (Setting)” - “Audio Page”)
Lens is out of focus	Is the focus adjustment gear engaged? Check the location of the catch.

●Connecting the power cable to AC 24 V source

Conductor	1.0 mm dia	1.6 mm dia	2.0 mm dia
diameter (mm)	or more	or more	or more
Max cable	90	240	370
distance (meters)
(Reference value)

Note

•For safety reasons, turn on the power only after confirming that all the connections are completed.

•Be sure to turn off the camera before connecting cables.

•If you use both the AC 24 V power cable and the PoE-based LAN cable simultaneously, the camera may fail. Always supply power using either method.

•To use an AC 24 V power supply, remove the factory- installed tape from the power cable, connect to an AC 24 V power supply, and wrap the connector with new insulation tape.

●LAN cable

•When connecting to a switching hub: Use a straight cable.

•When connecting to a computer: Use a crossing cable.

•A 100-meter or less length and Category-5 or higher grade STP (shielded) cable is recommended.

Note

•The crossing cable may not be used for some computer models. Check the LAN specifications of the computer when you directly connect this unit to the computer.

●Alarm I/O cable

•A 50-meter or less length shielded cable is recommended.

Specifications

* The specifications and appearance of this unit are subject to change for purposes of improvement without prior notice.

		VN-H257U		VN-H237U
	Image sensor	1/3-inch Square-Pixel Progressive Scan CMOS (elementary color filter)
Camera	Effective pixels	Approximately 2,120,000 pixels
		1944 (H) x 1092 (V)
section	Minimum illuminance	(50 %, AGC High, 1/30 s)		(50 %, AGC High, 1/30 s)
		Color: 0.3 lx (typ.)		Color: 0.3 lx (typ.)
	of subject
		Black and White : 0.03 lx (typ.)		Black and White : 0.25 lx (typ.)
Monitor output		75 Ω, 1.0 Vp-p
		NTSC or PAL (switch selectable)
	Input	Can connect to a microphone that has a		–
Audio input		plug-in power system
	Reference voltage	DC 2.47 V(typ.)		–
	Impedance	2.2 kΩ (typ.)		–
Audio output		Line OUT (200 Ω, Max 1.9 Vp-p)		–
	Image compression format	JPEG, H.264 High Profile, H.264 Baseline Profile, MPEG-4
			1920 × 1080

Audio cable connection (VN-H257U)

Connect the audio cable for an audio device.

Audio cable (Brown and White) (MIC IN)	: Connect to a condenser microphone that has a plug-in power
	system, etc.
Audio cable (Black and White) (LINE OUT)	: Connect to a speaker with a built-in amp, etc.
Memo
• A shielded audio cable is recommended.

* For the location to connect the audio cable, refer to [Cabling] (☞ page 2).

Alarm I/O cable connection (VN-H257U)

		1280 × 960
	Frame size	1280 × 720
Network		640 × 480
		640 × 360
output
		320 × 240
	Audio compression	μ-Law (64 kbps), AD/DA 16 bits,	–
	formats	Fs = 8 kHz, monaural
	Network interface	RJ-45
		100BASE-TX/10BASE-T/FULL/HALF/Auto-negotiation enabled
		No-voltage a contact input, PNP
Alarm input		open collector input, low level, latch/
		momentary (500 msec or longer) (1 mA	–
		circuit current at low level, and 3.3 VDC
		applied voltage at high level)
Alarm output		NPN open collector-output (16 VDC safe
		excitation voltage, and 30 mA allowable	–
		sink current)
Alarm record		16 MB
	Focal length	f = 3 mm to 9 mm	f = 2.8 to 10.5 mm
Lens	Maximum aperture ratio	F1.2 (f = 3 mm) to F2.1 (f = 9 mm)	F1.2 (f = 2.8 mm) to F2.6 (f = 10.5 mm)

Alarm input

Connect an infrared sensor, door sensor, metal sensor, a manual switch or other device.

•To avoid noise entering the internal circuit, enter the non-voltage contact signal in the Alarm IN terminal.

•Do not supply voltage.

•The alarm can be set to be activated during close contact (MAKE) or during open contact (BREAK) can be set from the menu.

•The alarm signal should last for at least 500 msec. If the alarm signal is short, it may not be recognized.

●Input conditions

•Connect non-voltage a contact or open collector output circuit

(For details on how to set polarities, please refer to “Instructions (Setting)”.)

•Low level terminal current below 1 mA

•High level terminal current 3.3 V

This
camera		Sensor example (1)
DC3.3 V		VCC
Input 1 or
Input 2	OUT	R
3.3 V	1 mA
G	G
(Alarm input equivalent circuit)		Sensor example (2)
		Relay switch or
		other devices

OUT

G

Alarm output

Connect an alarm device, indicator, lighting, buzzer or other device.

•An alarm output signal is an open collector output. You can configure the menu to set the alarm to sound when contacts short circuit (MAKE) or when the contacts are open (BREAK). (Pressure resistance lower than 16V, 30 mA)

•This terminal has different polarities. The output voltage at the positive terminal must always be higher than the output voltage at the negative terminal. Otherwise, the circuit may be damaged.

●Output conditions

•Equivalent to NPN open collector output

(For details on how to set the output logic, please refer to “Instructions (Setting)”.)

•Safe excitation voltage: DC16 V or lower

•Allowable surge current: 30 mA

•Momentary (100 ms to 5000 ms) output

(For details on how to set the time, please refer to “Instructions (Setting)”.)

Alarm device

Thisexample camera

Output 1 or		DC12 V
Output 2	IN R

G G

(Alarm output equivalent circuit)

Note

•Connect the G terminal cable of this camera to the GND of the alarm device.

	Aperture range	F1.2 to F360	F1.2 to F360
	Zoom ratio	3 x	3.75 x
LAN	Standards	Compliant with IEEE802.3, IEEE802.3u and IEEE802.3af
	Communication	TCP/IP, UDP/IP, FTP, ICMP, ARP, DHCP, SNTP, HTTP, SMTP, RTP, RTSP, IPv4,
standards
	protocol	IPv6, DSCP, HTTPS, SNMP
	Power supply voltage	AC24 V 50 Hz/ 60 Hz, or PoE (DC-48 V)	PoE(DC-48 V)
	Current consumption	AC24 V 0.5 A, or PoE 150 mA (7.2 W)	120 mA
	Ambient temperature	-10 °C to 50 °C (Operation)
General		0 °C to 40 °C (Recommended)
	Ambient humidity	20 %RH to 90 %RH (without condensation)
	Mass	Approx. 480 g	Approx. 450 g
	Option (sold separately)	Ceiling mount bracket (WB-S2205)

VN-H257U/VN-H237U
External dimensions (unit: mm)		Mounting hole	46
	111	for a screw
		4.5
		.5
		4
		117	83.5
			.5
		87	4
SR4	2		4.5
		.
		5	Mounting hole for a screw
Hole in the ceiling (unit: mm)			Mounting hole for a screw
		Front of the camera
		46

* For connecting the Alarm I/O cable, refer to [Cabling] (☞ page 2).

		body)
	111	(camera
Φ
		Φ 30 (cable hole)
83.5
		20	Pan adjustable
			range
			350

Direction cables were pulled out

7.7

Mounting hole for a screw 10

LST1234-001D

4