KEYENCE DL-RS1A/IG - Manual (Page 5)

3
Before Using the Unit
(5) Alarm indicator
This indicator lights up in red.
For information on the actions you should take when an alarm occurs, refer to "Troubleshooting" (page 21).
After turning on the power, the alarm indicator lights for the following amount of time, and
communication cannot be performed during this time.
(6) Read/write setting switch
Use this switch to allow or prohibit writing to the sensor amplifiers. (You can only manipulate this
switch while the unit is active (turned on).)
(7) Power indicator
Lights up in green when the unit has power.
( 8 ) Communication terminal block
Use the terminals on the terminal block to attach communication cables for connecting the unit with external devices.
* Recommended communication cable
KPEV-SP(1P) wire with balanced type twisted shield (strand wire)
Nominal cross-section area 0.16mm
2 (AWG25) min.
A terminal cover is attached to the terminal block.
The terminal cover must be placed over the terminal block when you finish connecting the cables.
The terminals for SG (Nos. 1, 4, and 5) are used in common with the blue wire of the sensor amplifier
main unit.
No. of connected units Incommunicable time
1 to 4 Approx. 2 s
Position of the switch Description
R
(Factory default position)
The unit can read data from the sensor amplifiers. However, it
cannot write settings to the sensor amplifiers.
RW
The unit can both read data from and write settings to the
sensor amplifiers.
SG
RD
SD
SG
SG
DRQ
Communication cable
To external device
KPEV-SP(1P) wire with balanced
type twisted shield (strand wire)
Terminal No. Terminal Description
1 SG
Connects to the shielded wire of the communication cable.
The terminals for SG (Nos. 1, 4, and 5) are internally short-circuited.
2 RD (input) Connects to the SD terminal of an external device via a communication cable.
3 SD (output) Connects to the RD terminal of an external device via a communication cable.
4 SG The terminals for SG (Nos. 1, 4, and 5) are internally short-circuited.
5 SG The terminals for SG (Nos. 1, 4, and 5) are internally short-circuited.
6 DRQ (input)
When there is a short-circuit between DRQ and SG, the sensor amplifier data is
transmitted even without a command from the external device.
Point
Reference
Connecting the Unit to Sensor Amplifiers
This section describes how to mount a DL-RS1A and connect it to sensor amplifiers.
Mounting the Unit
■ Mounting the unit on the DIN rail
1 Fit the tab of the lower part of the unit to the
DIN rail. While inserting the unit in the
direction of arrow (1), push the body down in
the direction of arrow (2).
2 To detach the unit, lift the unit in the direction
of arrow (3) while pushing it in the direction
of arrow (1).
When using the mounting bracket (OP-60412), install it as shown in the illustration below.
(1)
(3)
(2)
Mounting bracketOP-60412