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| The R400 Series flexibility is provided through its broad range of modules that are easy to configure and neatly connect into the rear of the indicator. There are 4 module slots where an indicator can be equipped with only the features required for a given installation.
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| Communication Modules
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| Communication modules are in addition the built in RS232/RS485 ports on the R400 indicators. These modules are all fully isolated and recommended for application where there is a risk of lightening or surges or where additional communication ports are required. M4201 RS232/RS232, M4202 RS232/RS485, M4203 RS485/RS485)
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| Input/Output Modules (M4301, M4311, M4321, M4331)
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| An R400 indicator can be equipped with up to 32 I/O. These I/O are electrically isolated, designed for direct connection into PLC's and are capable of driving low voltage actuators directly. Each module has 8 digital I/O ports which are limited to maximum input voltage of 30V and can drive up to 400mA.
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| Analogue Output Module (M4401)
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| The Analogue Module provides one isolated (>500V) 4-20mA or 0-10V analogue output. Update rates of up to 400Hz are possible with 1/65,000 resolution. Two digital I/O the same as the M4301 are also provided. It can be scaled to suit the input on the PLC. The fast update and high D to A conversion rate give a smooth output curve which helps a PLC to see more realistic readings (2.5msec step)
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| Button Module (M4302)
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| The Button Module provides 4 voltage free inputs for use with switches or thumbwheels. The voltage free inputs eliminate the need to wire up complicate input driver circuits.
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| Data Storage Device Module (M4501)
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| The Data Storage Module provides non volatile alibi memory storage (6M bytes) according to WELMEC 7.2 L. Compatible with later versions of software.
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