WRT C2S-121B User guide

Model： C2S-121B
C2S-121CS4
121 System Instruction
R
WRT
Version:H2
Add:WRT Industrial Base, Dafu Industrial Park, Guanguang Rd,
GuanLan Town, BaoAn District ShenZhen, China
Tel: [phone]
Fax: [phone]
Http:www.wrtsz.com

2
③ After connecting the transmission wires, hang the door phone on the
screws and pull it until it is stable.
4.Operation：
Max capacity:2 front door cameras can link with max 4 indoor monitors.
※ Instruction of socket for short circuit pin and coding(Only valid
when switched to “NO”)
There is a group of short circuit pins and several switches for coding
on the back of the monitor.Please follow the instruction below to set the
status for them before using.
Socket for video impedance: This is for choosing the resistance for
the the video signal. When there is only one monitor, please plug the short
circuit chip in this socket. When there are more than one monitors, you just
need to plug in the short circuit chip for one monitor(This principle also
applies for Socket 8 and 1.)
Socket 8：Choose the ringtone for monitors. When there is only 1
monitor, please switch to “NO” for Socket 8.(Work with camera: FZH-121).
Socket 7：Choose the model for front door camera. When the front
door camera is FZH-121, please switch to “NO” for Socket 7 for all the
monitors. If the front door camera is other model, than no need to switch to
“NO”.
Socket 1：Same principle as socket for video impedance. However, if
the monitor connects with the front door camera for apartment: EZH-121C,
this socket is for numbering the monitors.
Socket 1～6：These sockets are for numbering the monitors when the
monitorconnects with the camera: EZH-121C.(Max 64 households can be
supported in the apartment system.)
※ Numbering the monitors：
When the front door camera is EZH-121C(for apartment), you must
1
2
6
5
4
3
7
8
DATA
GND
12V
VID EO
+12V
GND
11
10
912
13
14
视频输 入
匹配选 择
1 2 3 4 5 6 7 8
1.Brief Introduction：
① Used in 121 system.
② 4.0"B/W(C2S-121B)/ Color(C2S-121CS4)Display，monitoring
Functions.
③ Receive calls from front door camera.
④ Unlock the doors.
⑤ Call other sub-phones.
⑥ There are two ways for power input: though Jack for adaptor or through
socket for power supply.
2.Equipment Description：
1.LCD Display 2.Microphone 3.Speaker 4.Volumn Adjustment
5.Brightness Adjustment 6.Call Button 7.Unlock/Monitor
8.Intercom 9.Jack for + 12VDC power adaptor 10.Choice for Front
Door Camera 11.Socket for Coding 12.Socket for 12VDC Input
13.Socket for 12VDC Output&GND&A/V 14.Socket for Video Impedance
3.Installation：
① Embed a 86 box in the wall.
② Fix 2 screws to the hole of 86 box .
1

3 4
number the monitors with the socket from 1~6. The way of numbering is :
adding the number which the socket represent to, then add 1 to the sum
you got. The final sum you get is the coded number of the monitors. The
number the socket represent to is as following:
Socket: 1 2 3 4 5 6
Number: 1 2 4 8 16 32
For example: If you want to number a monitor as Monitor 1, then do not plug
the short circuit chip for any socket from 1~6. If you want to number a
monitor as Monitor 16, then switch Socket 1,2,3,4 to “NO”(because 1+2+4
+8=15).
If there are more than one monitors in one family, then number the monitors
as the same.
※ Answering calls from the front door camera
When there is a call received from the camera,
the image from the Door Station will auto-display on the screen.
To talk with the visitor, press “ ” button. The conversation time is limited
to 2 minutes.
To release the electric lock for the visitor, press “ ”button.
To end the conversation, press “ ” button.
If there is no answer for the call within 30 seconds, the display will shut off
automatically after 2 beeps.
※Calling Other Door Phone(s)
When in standby, press“ ”button, you can call other door phone(s) conne
-cted.
If busy tone is heard, please try again later. The chime tone last about 30
seconds if nobody answers the call.The max conversation time is 2 minut
-es. To end the conversation, press “ ” button.
※Answering Calls from Door Phone
When there is a call received from one of the door phones,all other door
phone(s) connected ring at the same time and there are no image on the
screens. To answer the call, press “ ” button.
The max conversation time is 2 minutes. To end the conversation,
press “ ” button.The conversation will end with two beeps.
※ Monitor
You can monitor the sound and doorway image captured by the cameras
for up to 1 minute. There is an impedance selection socket in the back
side of the door phone, If there is only one video door phone connection,
please do remember to plug in the jumper. If more than one video door
phones connected, please plug in the jumper for the video door phone of
longest wiring distance and do remember to remove the jumpers for others.
When in standby, press “ ” the image from camera 1 will appear on
the screen; press “ ” button again, the monitoring will shut off.Within
10 seconds, press “ ” , the image captured by the Camera 2 will
appear on the screen.
In monitoring status, you will hear busy tone when you call the door
phone from the camera.
Voltage Input...........................+12VDC
Standby Current....................... 7 mA
Working current....................... 65 mA( /W)/ 380mA( olor)
CD Screen.............................4.0"
esolution...............................105600dots
................................ 20mV
................................. 5%
............................. 70dBA
Power Input.............................≥5mW
umidity..................................45%95%
5.Specification：
≤0
≤0 B ≤C
L
R
Sensitivity ≤
Distortion ≤
Sound Level ≥
H～

0 0
Working Temperature................-20 C～+55 C
2
Wires for power.......................RVV2×0.5mm
Wires from Door Camera
2
to Monitor................................RVV4×0.5mm ≤50m
2
RVV4×0.75mm ≤75m
2
RVV4×1.0mm ≤100m
Dimensions..............................165×230×50mm
6. Accessories
180mm two-wire connector..........1 pcs
180mm four-wire connector..........1 pcs
User’s manual.............................1 pcs
7.Trouble shooting
Tr o u b l e s
S o l u t i o n s
Check if the power wiring is connected
properly.
Check the wiring if connected well.
Check unlocking wires to see if is
is the wires recommended.
Check if the wiring between Monitor 1
and Monitor 2 is connected properly.
Adjust the volume adjustment to the
proper level.
There is no sound and no
display in the monitor.
When there is call from the
Door Station, there is no ring
tone and no display in the
monitor.
There is no sound or Sound
is too low.
Mo n it o r ca n not un l oc k
th e d oo r .
Mo n it o r 1 ca n t al k t o th e
fr o nt d o or c a me r a, b u t
ca n ’t t a lk t o M on i to r 2 .
DA T A
GND
12V
VIDEO
+12V
GND
VIDEO IN PUT
MATCH
12345678
DA T A
GN D
12 V
VI D E O
+12V
GND
VIDEO IN PUT
MATCH
12345678
DA T A
GND
12V
VIDEO
+12V
GND
VID EO INPU T
MAT CH
12345678
L+ L-
vol umn
adj ust
sta tus
cho osi ng
AU
GND
+12 V
VID EO
WRT-SD power
e-lock
-
L+
LK+
LK-
+
EZH-121C-1
8. Wiring diagram
One camera can connect
to max four monitors.
C2S-121B/C2S-121CS4
C2S-121B/C2S-121CS4 C2S-121B/C2S-121CS4
L+ L-
vol ume
adj ust
sta tus
cho osi ng
AU
GND
+12 V
VID EO
power
e-lock
-
L+
LK+
LK-
+
One camera with two monitors
EZH-121C-1
5 6
+12V /1.2ADC
+12V /1.2ADC
+12V /1.2ADC
WRT-SD

L+ L- L+ L-
vol ume
adj ust
vol ume
adj ust
sta tus
cho osi ng
sta tus
cho osi ng
AU GND
+12 V
VID EO
AU GND
+12 V
VID EO
WRT-SD power WRT-SD power
e-lock e-lock
- -
L+ L+
LK+ LK+
LK- LK-
+ +
No.1 EZH-121C-1 No.1 EZH-121C-1
L+ L- L+ L-
vol ume
adj ust
vol ume
adj ust
sta tus
cho osi ng
sta tus
cho osi ng
AU GND
+12 V
VID EO
AU GND
+12 V
VID EO
WRT-SD power WRT-SD power
e-lock e-lock
- -
L+ L+
LK+ LK+
LK- LK-
+ +
No.2 E ZH -1 21 C- 1 No.2 E ZH -1 21 C- 1
VIDEO
+12V
GND
AU
J2
J1
DO OR _ 2DO OR _ 1
J3
TO -F J
VIDEO
+12V
GND
AU
J2
J1
DO OR _ 2DO OR _ 1
J3
TO-FJ
AP T- 1 2 1 AP T- 1 2 1
DA T A
GN D
12 V
VI D E O
+12V
GND
vid eo inpu t
match
12345678
C2S-121B/C2S-121CS4
DA T A
GND
12V
VIDEO
+12V
GND
vid eo i np ut
match
12345678
DA T A
GN D
12 V
VI D E O
+12V
GND
vid eo inpu t
match
12345678
C2S-121B/C2S-121CS4 C2S-121B/C2S-121CS4
7 8
Two cameras with one monitor Two cameras with two monitors
+12V /1.2ADC+12V /1.2ADC +12V /1.2ADC

Two cameras with three monitors
L+ L-
L+ L-
vol ume
adj ust
vol ume
adj ust
sta tus
cho osi ng
sta tus
cho osi ng
AU
GND
+12 V
VID EO
AU
GND
+12 V
VID EO
WRT-SD power
WRT-SD power
e-lock
e-lock
-
-
L+
L+
LK+
LK+
LK-
LK-
+
+
L+ L-
L+ L-
vol ume
adj ust
vol ume
adj ust
sta tus
cho osi ng
sta tus
cho osi ng
AU
GND
+12 V
VID EO
AU
GND
+12 V
VID EO
WRT-SD powerWRT-SD power
e-lock
e-lock
-
-
L+
L+
LK+
LK+
LK-
LK-
+
+
Two cameras with four monitors
VIDEO
+12V
GND
AU
J2
J1
DO OR _ 2DO OR _ 1
J3
TO -F J
VI DE O
+1 2V
GN D AU
J2
J1
DO OR _ 2DO OR _ 1
J3
TO-FJ
AP T- 1 2 1
AP T- 1 2 1
No.1 EZH-121C-1
No.1 E ZH -1 21 C - 1 No.2 EZH-121C-1 No.2 E ZH -1 21 C- 1
DA T A
GN D
12 V
VI D E O
+12V
GND
vid eo i np ut
mat ch
12345678
DA T A
GN D
12 V
VI D E O
+12V
GND
vid eo i np ut
mat ch
12345678
DA T A
GN D
12 V
VI D E O
+12V
GND
vid eo i np ut
mat ch
12345678
DA T A
GN D
12 V
VI D E O
+12V
GND
vid eo i np ut
mat ch
12345678
DA T A
GND
12V
VIDEO
+12V
GND
vid eo inpu t
mat ch
12345678
DA T A
GND
12V
VIDEO
+12V
GND
vid eo inpu t
mat ch
12345678
DA T A
GN D
12 V
VI D E O
+12V
GND
vid eo inpu t
mat ch
12345678
C2S-121B/C2S-121CS4C2S-121B/C2S-121CS4
C2S-121B/C2S-121CS4C2S-121B/C2S-121CS4
C2S-121B/C2S-121CS4
C2S-121B/C2S-121CS4C2S-121B/C2S-121CS4
9 10
+12V /1.2ADC+12V /1.2ADC
+12V /1.2ADC+12V /1.2ADC
+12V /1.2ADC+12V /1.2ADC
+12V /1.2ADC