参数资料
| 型号： | LD2T06P0 |
| 厂商： | Red Lion Controls |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | TIMER 6 DIGIT 2.25" 120VAC RED |
| 标准包装： | 1 |
| 系列： | LD |
| 继电器类型： | 集成式 |
| 功能： | 可编程（多功能） |
| 电路： | SPDT（1 C 型） |
| 输出类型： | 机械式继电器 |
| 触点额定电压： | 5A @ 120VAC |
| 电源电压： | 多电压 |
| 安装类型： | 底座安装 |
| 端接类型： | 螺丝端子 |
| 计时调节方法： | DIP 开关，螺丝刀槽 |
| 计时启动方法： | 输入电压 |
| 其它名称： | RLC119 |
3.4 INPUT WIRING
The Large Display Timer is equipped with two signal inputs, A and B. These
inputs are wired using the six position terminal block (TBB) located inside the
unit on the right side.
Terminal 1: Input A
Terminal 3: Input B
Terminal 2: Input Common
CAUTION : DC common is NOT isolated from input common. In order to preserve the safety of the meter application, the DC common must be suitably
isolated from hazardous live earth referenced voltage; or input common must be at protective earth ground potential. If not, hazardous voltage may
be present at the User Input and Input Common terminals. Appropriate considerations must then be given to the potential of the input common with
respect to earth ground.
Two Wire Proximity, Current Source
Current Sinking Output
Current Sourcing Output
ON
Input A
ON
Input A
ON
Input A
**
**
* *
1 2 3 4
INP A
1
1 2 3 4
INP A
1
NPN
O.C.
1 2 3 4
INP A
1
INP COMM
INP B
2
3
2.2 k Ω
INP COMM
INP B
2
3
INP COMM
INP B
2
3
TBB
+EXC
4
TBB
+EXC
4
TBB
+EXC
4
PNP
O.C.
RESET/USER
COMM
5
6
RESET/USER
COMM
5
6
RESET/USER
COMM
5
6
Interfacing With TTL
Switch or Isolated Transistor; Current Sink
Switch or Isolated Transistor; Current Source
ON
*
Input A
+5 V
ON
**
Input A
ON
* *
Input A
1 2 3 4
INP A
INP COMM
1
2
COMMON
1 2 3 4
INP A
INP COMM
1
2
1 2 3 4
INP A
INP COMM
1
2
INP B
3
INP B
3
INP B
3
TBB
+EXC
4
TBB
+EXC
4
TBB
+EXC
4
RESET/USER
COMM
5
6
RESET/USER
COMM
5
6
RESET/USER
COMM
5
6
* Switch position is application dependent.
3.5 SERIAL WIRING
The serial connections are made via terminal block TBD located inside the
unit on the left side for the LD2 and on the right side for the LD4.
RS232 Communications
RS232 is intended to allow two devices to communicate over distances up to
50 feet. Data Terminal Equipment (DTE) transmits data on the Transmitted Data
(TXD) line and receives data on the Received Data (RXD) line. Data Computer
Equipment (DCE) receives data on the TXD line and transmits data on the RXD
line. The LD emulates a DTE. If the other device connected to the meter also
emulates a DTE, the TXD and RXD lines must be interchanged for
communications to take place. This is known as a null modem connection. Most
printers emulate a DCE device while most computers emulate a DTE device.
Some devices cannot accept more than two or three characters in succession
RS485 Communications
The RS485 communication standard allows the connection of up to 32
devices on a single pair of wires, distances up to 4,000 ft. and data rates as high
as 10M baud (the LD is limited to 38.4k baud). The same pair of wires is used
to both transmit and receive data. RS485 is therefore always half-duplex, that is,
without a pause in between. In these cases, the meter employs a busy function.
As the meter begins to transmit data, the RXD line (RS232) is monitored to
determine if the receiving device is “busy”. The receiving device asserts that it
is busy by setting the RXD line to a space condition (logic 0). The meter then
suspends transmission until the RXD line is released by the receiving device.
data cannot be received and transmitted simultaneously.
1
2
5
3
4
RS232 Terminal Block Connection Figure
3
RS485 Terminal Block Connection Figure
5
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