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参数资料
| 型号： | HMR2300R-485 |
| 厂商： | Honeywell Microelectronics & Precision Sensors |
| 文件页数： | 6/8页 |
| 文件大小： | 0K |
| 描述： | MAGNETOMETER RS485 3 AXIS |
| 产品培训模块： | Magnetic Sensors |
| 标准包装： | 1 |
| 系列： | HMR |
| 轴： | X，Y，Z |
| 测量范围： | ±2 高斯 |
| 用于测量： | 磁场强度，方向 |
| 分辨率： | 67 µ高斯 |
| 类型： | 数字磁力计 |
| 封装/外壳： | 模块（无外壳） |
| 接口： | RS-485 |
| 配用： | 342-1012-ND - KIT DEVELOP MAGNETOMETER RS232 |
| 其它名称： | 342-1020 |
HMR2300r
DATA COMMUNICATIONS
The RS-422 signals are balanced differential signals that
can send and receive simultaneously (full-duplex). The RS-
485 signals are also balanced differential levels but the
transmit and receive signals share the same two wires.
This means that only one end of the transmission line can
transmit data at a time and the other end must be in a
receive mode (half-duplex).
The RS-422 and RS-485 lines must be terminated at both
ends with a 120 ohm resistor to reduce transmission errors.
There are termination resistors built into the HMR2300r as
shown in Figures 4 and 5.
the escape code immediately after it, then a systematic
stop reading will occur. If an operator is trying to stop
readings using the keyboard, then several (if not many)
escape key entries must be given, since the RS-485 lines
share the same wires for transmit and receive. If an escape
key is entered during the time data is sent from the
HMR2300r, then the two will produce an erroneous
character that will not stop the data stream. The data stream
stop only when the escape key is pressed during the time
the HMR2300r is not transmitting.
The signals being transmitted are not dependent on the
absolute voltage level on either Lo or Hi but rather a
Computer
D
Z
Rx-lo
Rx-hi
Z
R
HMR
difference voltage. That is, when a logic one is being
transmitted, the Tx line will drive about 1.5 volts higher than
Tx-lo
the Rx line. For a logic zero, the Lo line will drive about 1.5
R
Z
Tx-hi
Z
D
volts lower than the Hi line. This allows signals to be
transmitted in a high noise environment, or over very long
distances, where line loss may otherwise be a problem—
typically 4,000 feet. These signals are also slew-rate limited
Z=120 ?
RS-422 Balanced (full-duplex)—Figure 4
for error-free transmission. The receiver has a common
mode input range of -7 to +12 volts. The signal connections
are shown in Figure 6.
Computer
D
Lo (A)
Z
Lo
Z
R
HMR
Note: When the HMR2300r is in a continuous read mode
on the RS-485 bus, it may be necessary to enter several
escape keys to stop the readings. If the computer taking
the readings can detect a carriage return code and send
R
Hi (B)
Z=120 ?
Hi
D
RS-485 Balanced (half-duplex)—Figure 5
PINOUT DIAGRAMS—FIGURE 6
J1 Pins
P1 Sockets
+6.5 to +15VDC power - 9
connected to P1 pin 6 - 7
+6.5 to +15VDC return - 5
Tx-lo (RS-422) or Lo (RS-485) - 3
Rx-lo (RS-422) - 1
J1 Pin#
1
2
3
4
5
6
7
8
9
10
10 - nc
8 - Rx-hi (RS-422)
6 - connected to P1 pin 2
4 - Chassis ground
2 - Tx-hi (RS-422) or Hi (RS-485)
Pin Assignment
Rx-lo (RS-422)
Tx-hi (RS-422) or Hi(B) (RS-485)
Tx-lo (RS-422) or Lo(A) (RS-485)
Chassis ground
+6.5 to +15VDC return
connected to P1 pin 2
connected to P1 pin 6
Rx-hi (RS-422)
+6.5 to +15VDC power
(no connect)
for manufacturers use only - 9
nc - 7
+6.5 to +15VDC power - 5
+6.5 to +15VDC return - 3
nc - 1
P1 Pin#
1
2
3
4
5
6
7
8
9
10
10 - for manufacturers use only
8 - for manufacturers use only
6 - connected to J1 pin 7
4 - Chassis ground
2 - connected to J1 pin 6
Pin Assignment
(no connect)
connected to J1 pin 6
+6.5 to +15VDC return
Chassis ground
+6.5 to +15VDC power
connected to J1 pin 7
(no connect)
for manufacturers use only
for manufacturers use only
for manufacturers use only
6
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